Eight Percent Or More Total Nickel Plus Manganese Containing Patents (Class 420/56)
  • Patent number: 9528173
    Abstract: High-Mn austenitic stainless steels having a chemical composition comprising C: 0.02-0.12 mass %, Si: 0.05-1.5 mass %, Mn: 10.0-22.0 mass %, S: not more than 0.0028 mass %, Ni: 4.0-12.0 mass %, Cr: 14.0-25.0 mass % and N: 0.07-0.17 mass % with the balance being Fe and inevitable impurities, provided that these components are contained so that ? cal represented by the following equation is not more than 5.5%: ? cal (mass %)=(Cr+0.48Si)?(Ni+0.11Mn?0.0101Mn2+26.4C+20.1N)?4.7, wherein each element symbol in the equation is a content of the respective element (mass %), and having a magnetic permeability of not more than 1.003 under a magnetic field of 200 kA/m.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: December 27, 2016
    Assignee: NIPPON YAKIN KOGYO CO., LTD.
    Inventors: Shigeru Hirata, Yuji Ikegami, Kazuhiro Yamakawa
  • Patent number: 8980167
    Abstract: There is provided a cost-effective stainless steel pipe having excellent expandability for oil country tubular goods, the stainless steel pipe having excellent CO2 corrosion resistance under a severe corrosive environment containing CO2, Cl?, and the like. The stainless steel pipe having excellent expandability for oil country tubular goods contains 0.05% or less C, 0.50% or less Si, Mn: 0.10% to 1.50%, 0.03% or less P, 0.005% or less S, 10.5% to 17.0% Cr, 0.5% to 7.0% Ni, 3.0% or less Mo, 0.05% or less Al, 0.20% or less V, 0.15% or less N, and 0.008% or less O, optionally at least one selected from Nb, Cu, Ti, Zr, Ca, B, and W, in a specific content, and the balance being Fe and incidental impurities, wherein a microstructure mainly having a tempered martensitic phase has an austenitic phase content exceeding 20%.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: March 17, 2015
    Assignee: JFE Steel Corporation
    Inventors: Mitsuo Kimura, Yoshio Yamazaki, Masahito Tanaka
  • Publication number: 20140326849
    Abstract: A mechanical structure is provided with a crystalline superelastic alloy that is characterized by an average grain size and that exhibits a martensitic phase transformation resulting from a mechanical stress input greater than a characteristic first critical stress. A configuration of the superelastic alloy is provided with a geometric structural feature of the alloy that has an extent that is no greater than about 200 micrometers and that is no larger than the average grain size of the alloy. This geometric feature undergoes the martensitic transformation without intergranular fracture of the geometric feature.
    Type: Application
    Filed: September 13, 2012
    Publication date: November 6, 2014
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Christopher A. Schuh, Jose M. San Juan, Ying Chen
  • Publication number: 20140241932
    Abstract: An alloy for golf club heads includes 3.0-5.5 wt % of silicon, 8.0-10.5 wt % of manganese, 14.5-17.0 wt % of chromium, 3.5-6.0 wt % of nickel, the rest being iron and inevitable impurities.
    Type: Application
    Filed: February 25, 2014
    Publication date: August 28, 2014
    Applicant: FUSHENG PRECISION CO., LTD.
    Inventors: Chan-Tung Chen, Wen-Ching Tsai
  • Publication number: 20140234153
    Abstract: A corrosion-resistant, hot and cold formable and weldable steel for use in hydrogen-induced technology with high resistance to hydrogen embrittlement has the following composition: 0.01 to 0.4 percent by mass of carbon, ?3.0 percent by mass of silicon, 0.3 to 30 percent by mass of manganese, 10.5 to 30 percent by mass of chromium, 4 to 12.5 percent by mass of nickel, ?1.0 percent by mass of molybdenum, ?0.2 percent by mass of nitrogen, 0.5 to 8.0 percent by mass of aluminum, ?4.0 percent by mass of copper, ?0.1 percent by mass of boron, ?1.0 percent by mass of tungsten, ?5.0 percent by mass of cobalt, ?0.5 percent by mass of tantalum, ?2.0 percent by mass of at least one of the elements: niobium, titanium, vanadium, hafnium and zirconium, ?0.3 percent by mass of at least one of the elements: yttrium, scandium, lanthanum, cerium and neodymium, the remainder being iron and smelting-related steel companion elements.
    Type: Application
    Filed: May 1, 2014
    Publication date: August 21, 2014
    Applicant: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Joerg NAUMANN, Wolfgang LEISTNER, Werner THEISEN, Sebastian WEBER, Thorsten MICHLER, Mauro MARTIN
  • Patent number: 8808471
    Abstract: A martensitic stainless steel alloy is strengthened by copper-nucleated nitride precipitates. The alloy includes, in combination by weight percent, about 10.0 to about 12.5 Cr, about 2.0 to about 7.5 Ni, up to about 17.0 Co, about 0.6 to about 1.5 Mo, about 0.5 to about 2.3 Cu, up to about 0.6 Mn, up to about 0.4 Si, about 0.05 to about 0.15 V, up to about 0.10 N, up to about 0.035 C, up to about 0.01 W, and the balance Fe and incidental elements and impurities. The nitride precipitates may be enriched by one or more transition metals.
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: August 19, 2014
    Assignee: QuesTek Innovations LLC
    Inventors: James A. Wright, Gregory B. Olson, Weijia Tang
  • Publication number: 20140154129
    Abstract: Stainless steel for fuel cell separators contains C: ?0.03%, Si: ?1.0%, Mn: ?1.0%, S: ?0.01%, P: ?0.05%, Al: ?0.20%, N: ?0.03%, Cr: 16 to 40%, and one or more of Ni: ?20%, Cu: ?0.6% and Mo: ?2.5%, the balance being Fe and inevitable impurities. According to X-ray photoelectron spectroscopy, the surface of the stainless steel contains fluorine and provides a 3.0 or higher ratio of the total of atomic concentrations of Cr and Fe in other than the metallic forms calculated from data resulting from the separation of peaks of Cr and Fe into metallic peaks and peaks other than the metallic peaks to the total of atomic concentrations of Cr and Fe in the metallic forms calculated from data resulting from the separation of peaks of Cr and Fe into metallic peaks and peaks other than the metallic peaks.
    Type: Application
    Filed: July 25, 2012
    Publication date: June 5, 2014
    Applicant: JFE STEEL CORPORATION
    Inventors: Noriko Makiishi, Hisato Noro, Shin Ishikawa, Shinsuke Ide, Tomohiro Ishii, Masayasu Nagoshi
  • Publication number: 20140131338
    Abstract: Various embodiments of a metal cored wires, hardband alloys, and methods are disclosed. In one embodiment of the present invention, a hardbanding wire comprises from about from about 16% to about 30% by weight chromium; from about 4% to about 10% by weight nickel; from about 0.05% to about 0.8% by weight nitrogen; from about 1% to about 4% by weight manganese; from about 1% to about 4% by weight carbon from about 0.5% to about 5% by weight molybdenum; from about 0.25% to about 2% by weight silicon; and the remainder is iron including trace elements. The hardband alloy produced by the metal cored wire meets API magnetic permeability specifications and has improved metal to metal, adhesive wear resistance compared to conventional hardband alloys.
    Type: Application
    Filed: November 12, 2013
    Publication date: May 15, 2014
    Applicant: Postle Industries, Inc.
    Inventor: Christopher J. Postle
  • Publication number: 20130287619
    Abstract: In one embodiment, a neutron shielding material is formed of boron-adding stainless steel of either austenite-ferrite two-phase stainless steel or ferritic stainless steel, the austenite-ferrite two-phase stainless steel containing, in mass %, B: 0.5% to 2.0%, Ni: 3.0 to 10.0%, and Cr: 21.00 to 32.00%, the ferritic stainless steel containing, in mass %, B: 0.5% to 2.0%, Ni: 4.0% or less, and Cr: 11.00 to 32.00%, and the boron-adding stainless steel being well in ductility and thermal conduction property.
    Type: Application
    Filed: June 12, 2013
    Publication date: October 31, 2013
    Inventors: Masanori Kibata, Yuuji Saito, Motoji Tsubota, Yoshitaka Doken, Makoto Sato, Shunichi Hatano, Masanori Ishiga, Go Ono
  • Patent number: 8486204
    Abstract: The hinge is made with a metal injection molding process from an alloy having at least: from 4 to 32 wt % Mn, from 16 to 37 wt % Cr, and from Fe that fills up the rest of the percentage.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: July 16, 2013
    Assignee: Shin Zu Shing Co., Ltd.
    Inventors: Yu-Chi Lu, Yu-Chan Hsieh, Shun-Tian Lin
  • Patent number: 8337749
    Abstract: An austenitic stainless steel composition including relatively low Ni and Mo levels, and exhibiting corrosion resistance, resistance to elevated temperature deformation, and formability properties comparable to certain alloys including higher Ni and Mo levels. Embodiments of the austenitic stainless steel include, in weight percentages, up to 0.20 C, 2.0-9.0 Mn, up to 2.0 Si, 15.0-23.0 Cr, 1.0-9.5 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.05-0.35 N, (7.5(% C))?(% Nb+% Ti+% V+% Ta+% Zr)?1.5, Fe, and incidental impurities.
    Type: Grant
    Filed: November 2, 2009
    Date of Patent: December 25, 2012
    Assignee: ATI Properties, Inc.
    Inventors: David S. Bergstrom, James M. Rakowski
  • Patent number: 8337748
    Abstract: An austenitic stainless steel composition including relatively low nickel and molybdenum levels, and exhibiting corrosion resistance, resistance to elevated temperature deformation, and formability properties comparable to certain alloys including higher nickel and molybdenum levels. Embodiments of the austenitic stainless steel include, in weight %, up to 0.20 C, 2.0-9.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 1.0-7.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.05-0.35 N, up to 4.0 W, (7.5(% C))?(Nb+Ti+V+Ta+Zr)?1.5, up to 0.01 B, up to 1.0 Co, iron and impurities. Additionally, embodiments of the steel may include 0.5?(Mo+W/2)?5.0 and/or 1.0?(Ni+Co)?8.0.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: December 25, 2012
    Assignee: ATI Properties, Inc.
    Inventors: James M. Rakowski, David S. Bergstrom, Charles P. Stinner, John J. Dunn, John F. Grubb
  • Patent number: 8192682
    Abstract: High strength metal alloys are described herein. At least one composition of a metal alloy includes chromium, nickel, copper, manganese, silicon, niobium, tungsten and iron. System, methods, and heaters that include the high strength metal alloys are described herein. At least one heater system may include a canister at least partially made from material containing at least one of the metal alloys. At least one system for heating a subterranean formation may include a tublar that is at least partially made from a material containing at least one of the metal alloys.
    Type: Grant
    Filed: April 26, 2010
    Date of Patent: June 5, 2012
    Assignee: Shell Oil Company
    Inventors: Phillip James Maziasz, John Paul Shingledecker, Michael Leonard Santella, Joachim Hugo Schneibel, Vinod Kumar Sikka, Harold J. Vinegar, Randy Carl John, Dong Sub Kim
  • Patent number: 8133431
    Abstract: An austenitic stainless steel, which comprises by mass %, C<0.04%, Si?1.5%, Mn?2%, Cr: 15 to 25%, Ni: 6 to 30%, N: 0.02 to 0.35%, sol. Al?0.03% and further contains one or more elements selected from Nb?0.5%, Ti?0.4%, V?0.4%, Ta?0.2%, Hf?0.2% and Zr?0.2%, with the balance being Fe and impurities, and among the impurities P?0.04%, S?0.03%, Sn?0.1%, As?0.01%, Zn?0.01%, Pb?0.01% and Sb?0.01%, and satisfy the conditions F1=S+{(P+Sn)/2}+{(As+Zn+Pb+Sb)/5}?0.0075 and 0.05?F2=Nb+Ta+Zr+Hf+2Ti+(V/10)?1.7?9×F1 has not only excellent liquation cracking resistance in the HAZ on the occasion of welding and excellent embrittling cracking resistance in the HAZ during a long period of use at high temperatures but also excellent polythionic acid SCC resistance and high temperature strength.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: March 13, 2012
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Takahiro Osuki, Kazuhiro Ogawa, Hiroyuki Hirata, Yoshitaka Nishiyama
  • Publication number: 20110286879
    Abstract: As a stainless steel for a metal part for clothing ornament capable of working into a complicated form part and having such nonmagnetic properties that the worked part can cope with the detection through needle detecting device is provided a high-Mn austenitic stainless steel having a chemical composition comprising C: 0.02-0.12 mass %, Si: 0.05-1.5 mass %, Mn: 10.0-22.0 mass %, S: not more than 0.03 mass %, Ni: 4.0-12.0 mass %, Cr: 14.0-25.0 mass % and N: 0.07-0.17 mass %, provided that these components are contained so that ? cal (mass %) represented by the following equation (1) is not more than 5.5 mass %: ? cal (mass %)=(Cr+0.48Si+1.21Mo+2.2(V+Ti)+0.15Nb)?(Ni+0.47Cu+0.11Mn?0.0101Mn2+26.4C+20.1N)?4.7??(1) and having a magnetic permeability of not more than 1.003 under a magnetic field of 200 kA/m.
    Type: Application
    Filed: February 26, 2010
    Publication date: November 24, 2011
    Applicant: NIPPON YAKIN KOGYO CO., LTD.
    Inventors: Shigeru Hirata, Yuji Ikegami, Kazuhiro Yamakawa
  • Publication number: 20110226459
    Abstract: The invention relates to an iron-based brazing material comprising a brazing alloy, which alloy comprises: from about 9 wt % to about 30 wt % Cr, from about 5 wt % to about 25 wt % Ni, from about 0 wt % to about 9 wt % Mo, from about 0 wt % to about 5 wt % Mn, from about 0 wt % to about 1 wt % N, from about 6 wt % to about 20 wt % Si. Within the alloy is at least one of the B and the P are present as a melting point lowering supplement to Si, and wherein B is from about 0.1 wt % to about 1.5 wt %, or wherein P is from about 0.1 to about 15 wt % P. The brazing alloy may comprise contaminating elements as at least one of C, O, and S, and optionally the brazing alloy also comprises at least one micro-alloying element as V, Ti, W, Nb, or Ta, and the micro-alloying element is less than 1.5 wt % in the brazing alloy. All values are stated in weight percent, and wherein Si, B and P lower the liquidus temperature, that is the temperature when the brazing material is completely melted.
    Type: Application
    Filed: March 22, 2011
    Publication date: September 22, 2011
    Inventor: Per Erik Sjodin
  • Publication number: 20110192127
    Abstract: A filter comprising a porous sintered stainless steel is provided. The filter includes 10-30% chromium, 5-25% nickel, 0.5-3% manganese; 1-4% silicon, and 0-3% molybdenum with the remainder being iron and inevitable impurities. The sintered steel has a density less than 80% of full density. The use of a stainless steel powder for the preparation of a filter having improved permeability at high temperatures also is described.
    Type: Application
    Filed: April 20, 2011
    Publication date: August 11, 2011
    Applicant: HÖGANÄS AB
    Inventors: Owe Mårs, Ingrid Hauer
  • Publication number: 20110064601
    Abstract: The invention relates to a stainless steel product, particularly to a duplex stainless steel casting with high machinability, to the use of the product and to the method to produce the product. The product contains in weight percent up to 0.07% carbon, up to 2% silicon, 3-8% manganese, 19-23% chromium, 0.5-1.7% nickel, up to 1% of molybdenum and/or tungsten with the formula (Mo+½W) less than 1%, up to 1% copper and 0.15-0.30% nitrogen, the remainder being iron and incidental impurities.
    Type: Application
    Filed: May 14, 2009
    Publication date: March 17, 2011
    Applicant: OUTOKUMPU OYJ
    Inventors: Mats Liljas, Jan Olsson, Peter Samuelsson, Mikael willför
  • Publication number: 20100253006
    Abstract: A steel product having a composition which contains by mass C: 0.01 to 1.9%, Si: 0.01 to 1.9%, Mn: 5.0 to 24.0% with balance consisting of Fe and unavoidable impurities and a steel product described above which further contains Cr: 18.0% or below and/or Ni: 12.0% or below in addition to the above essential elements. The above steel products may each further contain Al: 1% or below and/or N: 0.3% or below and the above steel products may each further contain one or more elements selected from among Nb, Ti, Zr, Mo and Cu in a total amount of 4.0% or below. The steel products can sufficiently follow the thermal expansion of a cylinder made of an aluminum alloy and thus enables the production of a piston ring which is suitable for use as a piston ring to slide on the inner face of a cylinder bore made of an aluminum alloy in an internal combustion engine and which can retain excellent sealing properties.
    Type: Application
    Filed: November 28, 2008
    Publication date: October 7, 2010
    Applicant: NIPPON PISTON RING CO., LTD
    Inventors: Yoshiki Ishikawa, Seisuke Takaki, Motonobu Onoda
  • Publication number: 20100189589
    Abstract: A Cr—Mn—N austenitic stainless steel, in which moderate manganese (Mn) and nitrogen (N) are essentially substituted for the costly nickel to produce a novel Cr—Mn—N steel, is provided, whereby reducing the cost of materials while maintaining the original physical and mechanical properties. The composition thereof includes by weight: 0.005% to 0.08% carbon, 0.3% to 0.9% silicon, 12.1% to 14.8% manganese, 0.001% to 0.04% phosphorus, 0.001% to 0.03% sulfur, 16% to 19% chromium, 0.001% to <0.82% nickel, 0.2% to 0.45% nitrogen, 0.001% to 0.3% molybdenum, 0.001% to 0.3% copper, 0.001% to 1.0% niobium by weight; 0.001% to 0.5% titanium by weight; and trace elements unavoidable in most manufacturing processes.
    Type: Application
    Filed: March 18, 2010
    Publication date: July 29, 2010
    Applicant: ADVANCED INTERNATIONAL MULTITECH CO., LTD
    Inventor: Wei-Ming Liu
  • Patent number: 7749431
    Abstract: A high-strength stainless steel, having good mechanical properties and corrosion resistance in a high-pressure hydrogen gas environment, is used as a container or other device for high-pressure hydrogen gas, and consists of, by mass %, C: not more than 0.04%, Si: not more than 1.0%, Mn: 7 to 30%, Cr: 15 to 22%, Ni: 5 to 20%, V: 0.001 to 1.0%, N: 0.20 to 0.50% and Al: not more than 0.10%, and the balance Fe and impurities. Among the impurities, P is not more than 0.030%, S is not more than 0.005%, and Ti, Zr and Hf are not more than 0.01% respectively, and the contents of Cr, Mn and N satisfy the relationship, 2.5Cr+3.4Mn?300N. The weld metal of the welded joint of the container or other device made of the said stainless steel satisfies the relationship, ?11?Nieq?1.1×Creq??8.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: July 6, 2010
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Masaaki Igarashi, Hiroyuki Semba, Mitsuo Miyahara, Kazuhiro Ogawa, Tomohiko Omura
  • Publication number: 20100150771
    Abstract: An austenitic series stainless steel and relevant casting method mainly comprises procedures of a preparation, a heat, a refinement, and a formation; wherein the present method mainly applies cheap scraps of stainless steels with about 13 to 18 wt % chromium basic to the manufacture. Further, the element manganese is used to substitute nickel and thence the proportion of nitrogen is increased while manufacturing. Accordingly, a component of the austenitic stainless steel of the present invention contains less than 0.08 wt % carbon, less than 0.9 wt % silicon, about 13 to 19 wt % manganese, less than 0.04 wt % phosphorus, less than 0.04 wt % sulfur, about 13 to 18 wt % chromium, less than 0.1 wt % nickel, less than 0.8 wt % nitrogen, and essentially iron and residuals. Such inclusion assists the austenitic stainless steel to attain same properties of preferable corrosion resistance and mechanism behaviors as those of the typical 300 series stainless steel.
    Type: Application
    Filed: December 17, 2008
    Publication date: June 17, 2010
    Inventor: Chen-Tung Tseng
  • Publication number: 20100080921
    Abstract: A target material for thermal spraying may include chromium and at least one of about 0.5-12% by weight of aluminum and about 2-15% by weight of manganese.
    Type: Application
    Filed: September 30, 2008
    Publication date: April 1, 2010
    Inventor: M. Brad Beardsley
  • Patent number: 7682471
    Abstract: The method of forming hard facing on an engine valve comprising providing an engine valve, providing an austenitic iron-based alloy, the austenitic iron-based alloy including, by weight, about 0.25% to about 0.9% carbon, about 1.5% to about 3.5% boron, about 1% to about 2% silicon, at least 20% chromium, an amount of manganese effective to provide the iron-based alloy with an austenitic structure, and the balance including iron and incidental impurities, and welding the austenitic iron-based alloy to at least a portion of the engine valve.
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: March 23, 2010
    Assignee: TRW Automotive U.S. LLC
    Inventor: Victor D. Levin
  • Publication number: 20090324441
    Abstract: A rustproof austenitic cast steel part having tensile strength greater than 550 MPA and elongation at break over 30%, is characterised in that the cast steel having an aluminium content of 0 to 4% and a silicon content of 1 to 4% is within an alloying range that is determined by the coordinates of four points (Crequiv.=14; Niequiv.=8), (Crequiv.=14; Niequiv.=14), (Crequiv.=22; Niequiv.=8) and (Crequiv.=22 Niequiv.=16), wherein the chromium and nickel equivalents are calculated from the chemical composition of a cast steel using the relations (1) and (2): Cr equiv . = % ? ? Cr + % ? ? Mo + 1.5 ? % ? ? Si + 0.5 ? % ? ? W + 0.9 ? % ? ? Nb + 4 ? % ? ? A ? ? 1 + 4 ? % ? ? Ti + 1.5 ? % ? ? V + 0 ? .9 ? % ? ? Ta ( 1 ) Ni equiv . = % ? ? Ni + 30 ? % ? ? C + 18 ? % ? ? N + 0.5 ? % ? ? Mn + 0.3 ? % ? ? Co + 0.2 ? % ? ? Cu - 0.
    Type: Application
    Filed: July 19, 2007
    Publication date: December 31, 2009
    Applicant: ACTECH GMBH
    Inventors: Andreas Weiss, Heiner Gutte, Matthias Radtke, Piotr Scheller
  • Publication number: 20090162239
    Abstract: The martensitic stainless steel according to the invention includes, in percent by mass, 0.010% to 0.030% C, 0.30% to 0.60% Mn, at most 0.040% P, at most 0.0100% S, 10.00% to 15.00% Cr, 2.50% to 8.00% Ni, 1.00% to 5.00% Mo, 0.050% to 0.250% Ti, at most 0.25% V, at most 0.07% N, and at least one of at most 0.50% Si and at most 0.10% Al, the balance consists of Fe and impurities, and the martensitic stainless steel satisfies Expression (1) and has a yield stress in the range from 758 MPa to 862 MPa. In this way, the martensitic stainless steel has a yield stress of 110 ksi grade (a yield stress in the range from 758 MPa to 862 MPa) and the value produced by subtracting the yield stress from the tensile stress is not less than 20.7 MPa. 6.0?Ti/C?10.
    Type: Application
    Filed: February 20, 2009
    Publication date: June 25, 2009
    Inventors: Hideki TAKABE, Tomoki MORI, Masakatsu UEDA
  • Publication number: 20090038280
    Abstract: A filter comprising a porous sintered stainless steel is provided. The filter includes 10-30% chromium, 5-25% nickel, 0.5-3% manganese; 1-4% silicon, and 0-3% molybdenum with the remainder being iron and inevitable impurities. The sintered steel has a density less than 80% of full density. The use of a stainless steel powder for the preparation of a filter having improved permeability at high temperatures also is described.
    Type: Application
    Filed: May 24, 2006
    Publication date: February 12, 2009
    Applicant: Hoganas AB
    Inventors: Owe Mars, Ingrid Hauer
  • Publication number: 20090010793
    Abstract: A method for producing cold-formable, high-strength steel strips or sheets with TWIP properties, wherein in successive working steps are carried out without interruption, uses a molten material of the following composition (mass %): C: 0.003-1.50%, Mn: 18.00-30.00%, Ni: ?10.00%, Si: ?8.00%, Al: ?10.00%, Cr: ?10.00%, N: ?0.60%, Cu: ?3.00%, P: ?0.40%, S: ?0.15%, selectively one or more components from the Se, Te, V, Ti, Nb, B, REM, Mo, W, Co, Ca and Mg group provided that the total content of Se, Te is ?0.25%, the total content of V, Ti, Nb, B, REM is ?4.00%, the total content of Mo, W, Co is ?1.50% and the total content of Ca, Mg is ?0.50%, the rest being iron and melting conditioned impurities, wherein the content of Sn, Sb, Zr, Ta and As, whose total content is equal to or less than 0.30% is included in said impurities.
    Type: Application
    Filed: November 3, 2004
    Publication date: January 8, 2009
    Applicant: THYSSENKRUPP STEEL AG
    Inventors: Jens-Ulrik Becker, Harald Hofmann, Manfred Menne, Jochen Wans
  • Publication number: 20080310990
    Abstract: There is provided a cost-effective stainless steel pipe having excellent expandability for oil country tubular goods, the stainless steel pipe having excellent CO2 corrosion resistance under a severe corrosive environment containing CO2, Cl?, and the like. The stainless steel pipe having excellent expandability for oil country tubular goods contains 0.05% or less C, 0.50% or less Si, Mn: 0.10% to 1.50%, 0.03% or less P, 0.005% or less S, 10.5% to 17.0% Cr, 0.5% to 7.0% Ni, 3.0% or less Mo, 0.05% or less Al, 0.20% or less V, 0.15% or less N, and 0.008% or less O, optionally at least one selected from Nb, Cu, Ti, Zr, Ca, B, and W, in a specific content, and the balance being Fe and incidental impurities, wherein a microstructure mainly having a tempered martensitic phase has an austenitic phase content exceeding 20%.
    Type: Application
    Filed: February 24, 2006
    Publication date: December 18, 2008
    Inventors: Mitsuo Kimura, Yoshio Yamazaki, Masahito Tanaka
  • Patent number: 7455811
    Abstract: An iron based brazing material for joining objects by brazing represents an alloy, which apart from iron contains approximately 9-30% Cr, approximately 0-8% Mn, approximately 0-25% Ni, 0-1% N, a maximum of 7% Mo, less than about 6% Si, approximately 0-2% B and/or about 0-15% P, all stated in weight percent, which addition of Si, P, and B in combination or separately lowers the liquidus temperature, that is the temperature at which the brazing material is completely melted. A brazed product is manufactured by brazing of iron based objects with an iron based brazing material which is alloyed with a liquidus lowering element as Si, P and B.
    Type: Grant
    Filed: June 3, 2002
    Date of Patent: November 25, 2008
    Assignee: Alfa Laval Corporate AB
    Inventor: Per Erik Sjodin
  • Publication number: 20080199345
    Abstract: Austenitic lightweight steel with a characteristic value of the cold formability higher than 30,000 MPa %, with tensile strengths between 600 and 800 MPa, and fracture strains over 50% has a chromium content of >2.0%<18%, a silicon content of >1.0%<4%, a manganese content of >2.0%<20%, an aluminum content of >0.05%<4%, wherein the steel is within an alloying range determined by (Crequ=14; Niequ=14.5); (Crequ=14; Niequ=17.5) (Crequ=20; Niequ=10) (Crequ=20; Niequ=13), wherein the chromium and nickel equivalents are calculated based on the following relations (1) and (2): Crequ=% Cr+% Mo+1.5% Si+0.5% W+0.9% Nb+4% Al+4% Ti+1.5% V??(1) Niequ=% Ni+30% C+18% N+0.5% Mn+0.3% Co+0.2% Cu?0.2% Al??(2) from the chemical composition of the steel, wherein the values represent wt. % and the balance is largely iron and other steel accompanying elements.
    Type: Application
    Filed: May 8, 2006
    Publication date: August 21, 2008
    Inventors: Piotr R. Scheller, Andreas Weiss, Heiner Gutte
  • Patent number: 7381369
    Abstract: Provided is free cutting alloy excellent in machinability, preserving various characteristics as alloy. The free cutting alloy contains: one or more of Ti and Zr as a metal element component; and C being an indispensable element as a bonding component with the metal element component, wherein a (Ti,Zr) based compound including one or more of S, Se and Te is formed in a matrix metal phase. The free cutting alloy is more excellent in machinability, preserving various characteristics as alloy at similar levels to a conventional case. The effect is especially conspicuous, for example, when a compound expressed in a chemical form of (Ti,Zr)4C2(S,Se,Te)2 as the (Ti,Zr) based compound is formed at least in a dispersed state in the alloy structure.
    Type: Grant
    Filed: May 18, 2004
    Date of Patent: June 3, 2008
    Assignees: Daido Tokushuko Kabushiki Kaisha, Tohoku Tokushuko Kabushiki Kaisha, Japan Industrial Technology Association, Tohoku Technoarch Co., Ltd.
    Inventors: Kiyohito Ishida, Katsunari Oikawa, Takashi Ebata, Tetsuya Shimizu, Michio Okabe
  • Patent number: 7335428
    Abstract: The invention relates to a cooking vessel comprising a base made of a multilayer material and a side wall, the said multilayer material comprising, in succession from the outside of the vessel to the inside of the vessel: an outer part, having a thickness eE, consisting of a layer of a ferromagnetic Nickel based alloy having a Curie temperature of between 30 and 350° C. and a thermal expansion coefficient of greater than or equal to 6.5.10?6 K?1, and a core, having a thickness ec, comprising at least one layer selected among aluminium, aluminium alloy and copper.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: February 26, 2008
    Assignees: Imphy Alloys, Alinox AG
    Inventors: Hervé Fraisse, Yves Grosbety, Thierry Waeckerle, Markus Spring, Norbert Hoffstaedter
  • Publication number: 20080006348
    Abstract: An austenitic iron-based alloy includes, by weight, about 0.25% to about 0.9% carbon, about 1.5% to about 3.5% boron, about 1% to about 2% silicon, at least about 20% chromium, an amount of manganese effective to provide the iron-based alloy with an austenitic structure, and the balance including iron and incidental impurities.
    Type: Application
    Filed: July 10, 2006
    Publication date: January 10, 2008
    Inventor: Victor D. Levin
  • Patent number: 6893727
    Abstract: This invention relates to a stainless steel gasket having markedly improved strength and fatigue properties due to precipitation strengthening. Its composition comprises C: at most 0.03%, Si: at most 1.0%, Mn: at most 2%, Cr: 16.0%-18.0%, Ni: 6.0%-8.0%, N: at most 0.25%, if necessary Nb: at most 0.30%, and a remainder of Fe and unavoidable impurities. After cold rolling, final annealing is carried out, and after a structure is formed of recrystallized grains with an average grain diameter of at most 5 ?m having an area ratio of 50-100% and an unrecrystallized portion having an area ratio of 0-50%, a metal gasket is formed by steps including temper rolling with a reduction of at least 30% to make the area ratio of a strain induced martensite phase at least 40%, and forming and heat treatment at 200-350° C.
    Type: Grant
    Filed: October 24, 2003
    Date of Patent: May 17, 2005
    Assignees: Sumitomo Metal Industries, Ltd., Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Kazuhiko Adachi, Seishi Ishiyama, Kenichi Goshokubo, Takashi Katsurai
  • Patent number: 6824672
    Abstract: An austenitic stainless steel with a composition comprising: at most 0.15% of C; 2% to 10% of Mn; at most 2% of Ni; at most 4% of Cu; 0.1% to 0.4% of N; 10% to 20% of Cr; at most 1% of Si; at most 3% of Mo; and at most 0.7% of Ti; is used to manufacture equipment, for example furnaces, reactors or ducts, or elements of this equipment, or to coat the internal walls of this equipment, said equipment being used to implement petrochemical processes conducted at temperatures of 350° C. to 1100° C. and in which coke can be formed.
    Type: Grant
    Filed: January 15, 2002
    Date of Patent: November 30, 2004
    Assignees: Institute Francais du Petrole, USINOR
    Inventors: Philippe Lecour, Xavier Longaygue, François Ropital, Laurent Antoni
  • Patent number: 6761777
    Abstract: The present invention is directed to a corrosion and erosion resistant High Chromium, Nitrogen bearing alloy, comprising the following composition in wt. %: 28-48 chromium, 0.01-0.7 nitrogen, 0.5-30 manganese, 0.01-5 boron, 0.3-2.5 carbon, up to 0.01-25 cobalt plus nickel, up to 0.01-5 silicon, up to 0.01-8 copper, up to 0.01-6 molybdenum, up to 2% of each one selected from group consisting of zirconium, vanadium, cerium, titanium, tungsten, niobium, aluminum, calcium, and rare earth elements with the balance being essentially iron and other trace elements or inevitable impurities. The alloy has a microstructure comprising hypoeutectic, eutectic, chromium carbides, boride and nitrides in the austenitic matrix, saturated with nitrogen with virtually no secondary carbides and nitrides.
    Type: Grant
    Filed: January 9, 2002
    Date of Patent: July 13, 2004
    Inventor: Roman Radon
  • Patent number: 6454879
    Abstract: An austenitic, paramagnetic and corrosion-resistant material, particularly in media with high chloride concentrations, the material having high strength, yield strength, and ductility, including carbon, silicon, chromium, manganese, nitrogen, and optionally, nickel, molybdenum, copper, boron, and carbide-forming elements. The material is preferably substantially completely austenitic. A process utilizing alloying technology that includes a deformation and synergistically results in production of a ferrite-free material that is reliably paramagnetic, is corrosion-resistant, and has high yield strength, strength, and ductility. The material can be very beneficially used, for example, in connection with oil field technology, such as for bore rods and drilling string components as well as for precision-forged components, and for high strength attachment and connection elements.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: September 24, 2002
    Assignees: Schoeller-Bleckman Oilfield Technology GmbH & Co. KG, Bohler Edelstahl GmbH & Co. KG
    Inventors: Herbert Aigner, Günter Hochörtler, Josef Bernauer
  • Publication number: 20020129876
    Abstract: An austenitic stainless steel with a composition comprising:
    Type: Application
    Filed: January 15, 2002
    Publication date: September 19, 2002
    Applicant: Institut Francais du Petrole
    Inventors: Philippe Lecour, Xavier Longaygue, Francois Ropital, Laurent Antoni
  • Patent number: 6361740
    Abstract: A high-damping, corrosion resistant and substantially non-magnetic material having high damping properties has been developed for use in dynamic applications, specifically, a disk drive suspension arm and load beam. A disk drive assembly includes a disk having a readable and writeable surface, a motor operable for rotating the disk, and an actuator assembly that includes a transducer mounted on a load beam. The actuator assembly is operable for positioning the transducer in transducing relationship with the surface of the disk. When the disk spins, shear forces create turbulence in the fluidic medium adjacent to the surface of the disk. The turbulence exerts unbalanced and variable forces on the load beam, inducing vibrational motion therein. If the vibrational energy stored in the load beam is not quickly damped, the surface of the disk, load beam or transducer can be damaged. The present invention discloses alloy compositions of the form (14-21)Mn, (10-13)Cr, (0-6)Si, (4-10)Ni, (0-6)Co, and (0-0.
    Type: Grant
    Filed: May 19, 2000
    Date of Patent: March 26, 2002
    Assignee: Intri-Plex Technologies, Inc.
    Inventors: Mehrooz Zamanzadeh, Ronald Noebe
  • Patent number: 6290905
    Abstract: A welding method for two members adapted to be welded and formed of a low-alloy steel for structural purposes causing the weld metal to develop martensite transformation during cooling after welding, so that the weld metal becomes expanded to a greater degree at room temperature than at a temperature at which the martensite transformation initiates. The welding material comprises a ferrous alloy containing C, Cr, Ni, Si, Mn, Mo and Nb, all of which meet substantially with the contents of the following equation (1): 170≦719−(795×C wt %)−(23.7×Cr wt %)−(26.5×Ni wt %)−(35.55×Si wt %)−(13.25×Mn wt %)−(23.7×Mo wt %)−(11.85×Nb wt %)<250  (1).
    Type: Grant
    Filed: February 16, 2000
    Date of Patent: September 18, 2001
    Assignee: Kawasaki Steel Corporation
    Inventors: Osamu Watanabe, Akihiko Ohta, Chiaki Shiga, Satoshi Nishijima
  • Patent number: 6159310
    Abstract: To form a weld metal having improved hot cracking resistance, low temperature cracking resistance, toughness, strength, and corrosion resistance when welding high Cr steels containing 7.5 wt % or more Cr, the filler wire of the present invention has the ratio of Cr equivalent/Ni equivalent of 1.8 to 2.8 and the product: of Cr equivalent.times.Ni equivalent of 100 to 140, where Cr equivalent=Cr+Mo+1.5 Si, Ni equivalent=Ni+0.5 Mn+30C; and forms a weld metal having a ternary phase microstructure composed of austenite, ferrite and martensite phases during the gas-shielded arc welding. The filler wire of the present invention typically consists of 0.005-0.12 wt % C, 0.01-1.0 wt % Si, 0.02-2.0 wt % Mn, 12.0-17.0 wt % Cr, 5.0-8.0 wt % Ni, 1.0-3.0 wt % Mo, and the balance of Fe and unavoidable impurities, the impurities including 0.03 wt % or less P and 0.01 wt % or less S.
    Type: Grant
    Filed: May 17, 1999
    Date of Patent: December 12, 2000
    Assignee: Nippon Steel Corporation
    Inventors: Hiroshige Inoue, Toshihiko Koseki, Shigeru Ohkita
  • Patent number: 5643530
    Abstract: The invention intends to develop a functional material provided with sufficient non-magnetism, strength and ductility. The material is a non-magnetic high manganese cast product composed of 0.2 to 0.03% C, not more than 1.0%. Si, 10 to 20% Mn, not more than 0.1% P, not more than 0.05% S, 15.0 to 20.0% Cr, 2.5 to 6.0% Ni and not more than 0.20% N, and is used in a state of as cast. In this non-magnetic high manganese cast product, a magnetic permeability in the state as cast is not more than 1.05, and the non-magnetic high manganese steel has mechanical properties such that a tensile strength is not less than 620N/mm.sup.2, a proof strength is not less than 250N/mm.sup.2, an elongation is not less than 40%, and a reduction of area is not less than 30%. The material is preferably applied to a complicated or large-sized product.
    Type: Grant
    Filed: July 13, 1995
    Date of Patent: July 1, 1997
    Assignee: Kurimoto, Ltd.
    Inventors: Yoshiaki Shingu, Yasushi Ueda
  • Patent number: 5614149
    Abstract: Coins, particularly game coins, which are soft and excellent in workability before the coining work and high in hardness and exhibit weak magnetism after the coining work are provided. The stainless steel for coins comprises C: not more than 0.03 wt %, Si: 0.1-1.0 wt %, Mn: 0.1-4 wt %, Ni: 5-15 wt %, Cr: 12-20 wt %, N: not more than 0.03 wt %, O: not more than 50 ppm, and, if necessary, at least one of Cu: 0.5-3.0 wt % and Mo: 0.1-2.0 wt % and austenite stabilization index M value of 20.0-23.0 and ferrite formation ratio F value of not more than 6. A method of producing coins of stainless steel is also provided which comprises subjecting a starting material of such a stainless steel to a cold rolling of 50%, heat-treating at 900.degree.-1100.degree. C. and subjecting to coining work of 15-25%.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: March 25, 1997
    Assignees: Nippon Yakin Kogyo Co., Ltd., Asahi Seiko Co., Ltd.
    Inventors: Hiroshi Abe, Toshihiko Taniuchi, Masaomi Tsuda, Yoshito Fujiwara
  • Patent number: 5514329
    Abstract: A fluid impeller for us in applications requiring superior cavitation erosion resistance. The impeller has a body fabricated from a castable metastable austenitic steel alloy which has a preferred chemical composition in the range of 17.5-18.5% chromium, 0.5-0.75% nickel, 0.45-55% silicon, 0.2-0.25% nitrogen, 15.5-16.0% manganese and 0.1%-0.12% carbon. Quantitative testing has shown cavitation resistance of four to six times that of standard boiler feed pump materials. A method for making cavitation resistant fluid impellers is also disclosed.
    Type: Grant
    Filed: June 27, 1994
    Date of Patent: May 7, 1996
    Assignee: Ingersoll-Dresser Pump Company
    Inventors: Colin McCaul, Vincenzo Fumagalli
  • Patent number: 5496514
    Abstract: A fracture resistant stainless steel sheet comprises: non-metallic inclusions of Al.sub.2 O.sub.3, MnO, and SiO.sub.2 which inevitably exist in stainless steel; the non-metallic inclusions having a composition situated in a region defined by nine points in a phase diagram of a 3-component system of "Al.sub.2 O.sub.3 --MnO--SiO.sub.2 "; the stainless steel sheet having an 1.0% on-set stress of at least 1520 N/mm.sup.2 (155 kgf/mm.sup.2); the stainless steel sheet having an anisotropic difference of 1.0% on-set stress of 196 N/mm.sup.2 (20 kgf/mm.sup.2) or less; and the stainless steel sheet having a Erichsen number of at least 4.6 mm.A method for producing a high fracture resistant stainless steel sheet comprises the steps of: preparing a stainless steel strip; applying to the stainless steel strip a process of annealing--pickling --first cold rolling (CR.sub.1)--first intermediate annealing--second cold rolling (CR.sub.2)--second intermediate annealing--third cold rolling (CR.sub.
    Type: Grant
    Filed: February 1, 1994
    Date of Patent: March 5, 1996
    Assignee: NKK Corporation
    Inventors: Katsuhisa Yamauchi, Hitoshi Misao, Tadashi Inoue, Tomoyoshi Okita
  • Patent number: 5173131
    Abstract: Stainless iron-base alloy having a total shape memory effect consisting, after a given cold mechanical deformation, in a recovery of the initial shape by heating, characterized in that its composition by weight is the following:9 to 13% chromium,15 to 25% manganese,3 to 6% silicon,the remainder being iron and residual impurities resulting from the fusion of substances necessasry for producing the alloy, the proportions of the elements satisfying the relation:1.43(%Si)+1 (%Cr) .ltoreq.17.The invention also provides a method for producing this alloy.
    Type: Grant
    Filed: November 21, 1990
    Date of Patent: December 22, 1992
    Assignee: Ugine, Aciers De Chatillon Et Gueugnon
    Inventor: Mantel Marc
  • Patent number: 5098652
    Abstract: The present invention provides non-magnetic stainless steel which is used as materials for small parts in precision machines and electronic equipment. The non-magnetic stainless steel consists of an iron-based alloy containing 9 to 22% by weight of nickel, 12 to 26% by weight of chromiun, the balance of iron and inevitable impurities. The martensitic area ratio of the iron-based alloy structure is not more than 20%. The stainless steel exhibits excellent workability and is suitable as a raw material for TV electron gun parts and small gears which are formed by strong working such as blanking or the like.
    Type: Grant
    Filed: June 11, 1990
    Date of Patent: March 24, 1992
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tsuyoshi Yasui, Nobuaki Nakashima, Shinzo Sugai, Eiichi Watanabe
  • Patent number: 5096664
    Abstract: Alloys according to the present invention exhibit good resistance to erosion and stress corrosion cracking. The contents of individual components in these alloys as expressed in terms of wt. % are as follows:______________________________________ 0.35 .ltoreq. C .ltoreq. 1.7, Si .ltoreq. 2.5, 10 .ltoreq. Mn .ltoreq. 25, 6 .ltoreq. Cr .ltoreq. 20, 0.5 .ltoreq. V .ltoreq. 7, 0.5 .ltoreq. Nb .ltoreq. 3, and N .ltoreq. 0.1, Fe = balance. ______________________________________Further, a mutual relationship represented by the following formula is maintained amoung the contents of V, Nb and C:(V/5+Nb/8)/C.gtoreq.1.
    Type: Grant
    Filed: January 30, 1991
    Date of Patent: March 17, 1992
    Assignee: Agency of Industrial Science and Technology
    Inventors: Toshihiro Uehara, Rikizo Watanabe
  • Patent number: 5041174
    Abstract: An insert for connecting a part made from a steel containing 12-14% by weight of manganese to at least one carbon steel part, said insert being made from an austenitic-ferritic alloy having the following chemical composition (in % by weight):______________________________________ Carbon 0.025-0.035% Manganese 6-11% Silicon 0.5-1.5% Nickel 5-8% Chromium 17.5-20% Molybdenum <0.5% Nitrogen 0.12-0.20% Phosphorus and sulfur .ltoreq.0.030% ______________________________________and the delta ferrite content of which (in percent by volume) as measured by micrographic counting ranges between about 5% and 15%.
    Type: Grant
    Filed: June 29, 1989
    Date of Patent: August 20, 1991
    Assignee: Manoir Industries, S.A.
    Inventors: Fernand Pons, Yvon Delayen