Copper Containing Patents (Class 420/58)
  • Patent number: 10329649
    Abstract: A steel product, such as a strip, plate, sheet, bar or wire, manufactured from austenitic stainless steel. A steel product, wherein: a—the average grain size of the recrystallized austenitic structure of said product is at most 6 , b—less than 50% of the structure of said product is non-recrystallized austenite c—the yield strength (Rpo.2) is at least 350 MPa, d—the tensile strength (Rm) is at least 600 MPa, and e—the uniform elongation (Ag) of said product is at least 5%, depending on the strength. The invention also relates to a method.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: June 25, 2019
    Assignee: SOLU STAINLESS OY
    Inventor: Jouko Leinonen
  • Patent number: 9066374
    Abstract: A method for holding and warming food. The method includes the steps of: using a container formed of 300-series stainless steel, wherein the container is formed by a cold working process; and applying to the container a magnetic field from an induction coil, wherein the magnetic field is sufficient to induce a current in the container to heat the container.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: June 23, 2015
    Assignee: COOKTEK INDUCTION SYSTEMS, LLC
    Inventors: Warren S. Graber, Reinhard Metz, Robert J. Visher
  • Patent number: 9039961
    Abstract: The invention relates to a low-nickel austenitic stainless steel with high resistance to delayed cracking and the use of the steel. The steel contains in weight % 0.02-0.15% carbon, 7-15% manganese, 14-19% chromium, 0.1-4% nickel, 0.1-3% copper, 0.05-0.3% nitrogen, the balance of the steel being iron and inevitable impurities, and the chemical composition range in terms of the sum of carbon and nitrogen contents (C+N) and the measured Md3o-temperature is inside the area defined by the points ABCD which have the following values Point Md30° C. C+N % A?80 0.1 B+7 0.1 C?40 0.40 D?80 0.40.
    Type: Grant
    Filed: April 18, 2011
    Date of Patent: May 26, 2015
    Assignee: Outokumpu Oyj
    Inventors: Juho Talonen, Suresh Kodukula, Tero Taulavuori
  • 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
  • Patent number: 8703047
    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: Grant
    Filed: February 26, 2010
    Date of Patent: April 22, 2014
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Shigeru Hirata, Yuji Ikegami, Kazuhiro Yamakawa
  • Patent number: 8608873
    Abstract: A stainless steel and a flat cold product produced therefrom, which can be easily produced in an economical manner. A steel according to the invention, in the cold-rolled state, has a microstructure with 5-15% by volume ?-ferrite and austenite as the remainder. It contains (in % by weight): C: 0.05-0.14%, Si: 0.1-1.0%, Mn: 4.0-12.0%, Cr: >17.5-22.0%, Ni: 1.0-4.0%, Cu: 1.0-3.0%, N: 0.03-0.2%, P: max. 0.07%, S: max. 0.01%, Mo: max. 0.5%, optionally one or more elements from the group consisting of Ti, Nb, B, V, Al, Ca, As, Sn, Sb, Pb, Bi, and H wherein Ti: max. 0.02%, Nb: max. 0.1%, B: max. 0.004%, V: max. 0.1%, Al: 0.001-0.03%, Ca: 0.0005-0.003%, As: 0.003-0.015%, Sn: 0.003-0.01%, Pb: max. 0.01%, Bi: max. 0.01%, H: max. 0.0025%, and remainder Fe and unavoidable impurities.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: December 17, 2013
    Assignee: Outokumpu Nirosta GmbH
    Inventors: Cornel Abratis, Lutz Ernenputsch, Wilfried Klos, Hans-Joachim Krautschick, Michael Sachtleber
  • Patent number: 8535606
    Abstract: Disclosed are corrosion resistant, non-magnetic austenitic stainless steels containing alloying elements molybdenum, nickel, and copper and further containing small quantities of an additional element selected from the group consisting of a rare-earth element, calcium, cobalt, iridium, osmium, rhenium, rhodium, ruthenium, silver, and a combination thereof.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: September 17, 2013
    Assignee: Baker Hughes Incorporated
    Inventor: Hendrik John
  • Patent number: 8528513
    Abstract: The invention relates to a steel piston for internal combustion engines, comprising at least one piston upper part (12) provided with a combustion cavity (11) and an annular wall (5), and a piston lower part (13) provided with a connecting rod bearing (8). The steel piston is cast as a single component from a reduced-density steel alloy or a special steel alloy in the same material by means of a low-pressure casting method.
    Type: Grant
    Filed: June 12, 2007
    Date of Patent: September 10, 2013
    Assignee: Daimler AG
    Inventors: Tilmann Haug, Wolfgang Rehm, Karl Weisskopf
  • 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
  • Publication number: 20130039802
    Abstract: The invention relates to a low-nickel austenitic stainless steel with high resistance to delayed cracking and the use of the steel. The steel contains in weight % 0.02-0.15% carbon, 7-15% manganese, 14-19% chromium, 0.1-4% nickel, 0.1-3% copper, 0.05-0.3% nitrogen, the balance of the steel being iron and inevitable impurities, and the chemical composition range in terms of the sum of carbon and nitrogen contents (C+N) and the measured Md3o-temperature is inside the area defined by the points ABCD which have the following values Point Md30° C. C+N % A?80 0.1 B+7 0.1 C?40 0.40 D?80 0.40.
    Type: Application
    Filed: April 18, 2011
    Publication date: February 14, 2013
    Applicant: OUTOKUMPU OYJ
    Inventors: Juho Talonen, Suresh Kodukula, Tero Taulavuori
  • Publication number: 20120315180
    Abstract: A stainless steel music string having a composition in percent by weight (wt %) of, 0.01?C?0.04; 0.01?N?0.06; 0.1?Si?1.0; 0.2?Mn?2.0; 5.0?Ni?10; 16?Cr?20; 0.2?Cu?3.0; 0?Mo?2.0; 0?W?0.5; 0?V?0.5; 0?Ti?1.0; 0?Al?1.0; 0?Nb?1.0; 0?Co?1.0, and the balance being Fe and normally occurring impurities The music string also includes at least 90% martensite phase by volume.
    Type: Application
    Filed: December 22, 2010
    Publication date: December 13, 2012
    Applicant: SANDVIK INTELLECTUAL PROPERTY AB
    Inventors: Anders Soderman, Lars Nylof
  • 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
  • Publication number: 20110293464
    Abstract: A stainless steel and a flat cold product produced therefrom, which can be easily produced in an economical manner. A steel according to the invention, in the cold-rolled state, has a microstructure with 5-15% by volume ?-ferrite and austenite as the remainder. It contains (in % by weight): C: 0.05-0.14%, Si: 0.1-1.0%, Mn: 4.0-12.0%, Cr: >17.5-22.0%, Ni: 1.0-4.0%, Cu: 1.0-3.0%, N: 0.03-0.2%, P: max. 0.07%, S: max. 0.01%, Mo: max. 0.5%, optionally one or more elements from the group consisting of Ti, Nb, B, V, Al, Ca, As, Sn, Sb, Pb, Bi, and H wherein Ti: max. 0.02%, Nb: max. 0.1%, B: max. 0.004%, V: max. 0.1%, Al: 0.001-0.03%, Ca: 0.0005-0.003%, As: 0.003-0.015%, Sn: 0.003-0.01%, Pb: max. 0.01%, Bi: max. 0.01%, H: max. 0.0025%, and remainder Fe and unavoidable impurities.
    Type: Application
    Filed: September 3, 2009
    Publication date: December 1, 2011
    Applicant: THYSSENKRUPP NIROSTA GMBH
    Inventors: Cornel Abratis, Lutz Ernenputsch, Wilfried Klos, Hans-Joachim Krautschick, Michael Sachtleber
  • 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: 20100272595
    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: Application
    Filed: April 26, 2010
    Publication date: October 28, 2010
    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
  • Publication number: 20100233015
    Abstract: This invention provides a steel sheet for structural components excellent in impact absorption property comprising, in mass %, C: 0.005 to 0.05%, N: 0.01 to 0.30%, Si: 0.1 to 2%, Mn: 0.1 to 15%, Ni: 0.5 to 8%, Cu: 0.1 to 5%, Cr: 11 to 20%, Al: 0.01 to 0.5%, and a balance of Fe and unavoidable impurities, wherein Md30 value given by equation (A) is 0 to 100° C., and total impact energy absorption in dynamic tensile testing is 500 MJ/m3 or greater: Md30=551?462(C+N)?9.2Si?8.1Mn?13.7Cr?29(Ni+Cu) ??(A).
    Type: Application
    Filed: October 30, 2007
    Publication date: September 16, 2010
    Inventors: Junichi Hamada, Haruhiko Kajimura, Fumio Fudanoki, Toshio Tanoue, Ken Kimura
  • Patent number: 7785427
    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 tubular that is at least partially made from a material containing at least one of the metal alloys.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: August 31, 2010
    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: 7780908
    Abstract: An austenitic stainless steel includes (a) 0.03 wt % to 0.12 wt % of C, (b) 0.2 wt % to 1.0 wt % of Si, (c) 8.55 wt % to 10.12 wt % of Mn, (d) 14.0 wt % to 16.0 wt % of Cr, (e) 4.05 wt % to 4.31 wt % of Ni, (f) 0.04 wt % to 0.07 wt % of N, (g) 1.0 wt % to 3.5 wt % of Cu, (h) trace amount of Mo, and the balance being Fe and incidental impurities. The austenitic stainless steel has a ?-ferrite content less than 8.5 and equal to 6.77[(d)+(h)+1.5(b)]?4.85[(e)+30(a)+30(f)+0.5(c)+0.3(g)]?52.75.
    Type: Grant
    Filed: October 3, 2007
    Date of Patent: August 24, 2010
    Assignee: Yieh United Steel Corp.
    Inventors: Meng-Hsin Hsieh, Yi-Cheng Wu, Pei-Te Huang, Hao-Shang 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: 20100119403
    Abstract: Austenitic stainless steel for cold working suitable for later machining, characterized by the following composition by weight: carbon<0.030% 0.3%<silicon<1% 7%<manganese<9% 4.55%<nickel<7% molybdenum<0.8% 2%<copper<4% 0.02%<nitrogen<0.060% sulfur<0.01% phosphorus<0.
    Type: Application
    Filed: January 13, 2010
    Publication date: May 13, 2010
    Applicants: UGITECH, ArcelorMittal - Stainless France
    Inventors: Jean-Michael HAUSER, Raphael Craen
  • Patent number: 7708841
    Abstract: An austenitic, substantially ferrite-free steel alloy and a process for producing components therefrom. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.
    Type: Grant
    Filed: December 2, 2004
    Date of Patent: May 4, 2010
    Assignees: Boehler Edelstahl GmbH & Co KG, Schoeller-Bleckmann Oilfield Technology GmbH
    Inventors: Gabriele Saller, Herbert Aigner, Josef Bernauer, Raimund Huber
  • Publication number: 20100035115
    Abstract: An Au plated film 12 is formed on the surface of a plate-formed metal base 13 composed of a metal less noble than Au, and the product is cut along a planned cutting line 18 reflecting a contour of a desired component, to thereby form a separator 10. Thus-formed separator 10 has the Au plated film 12 formed on the main surface 10a thereof, and has a cutting plane 16 formed as an end face 16 stretched up to the main surface 10a. The metal base 13 exposes in a part of the cutting plane 16, in a width of the exposed region of 1 mm or less. This is successful in providing a metal component for fuel cell which is satisfactory in the corrosion resistance and allows easy fabrication at low costs, a method of manufacturing the same, and also in providing a fuel cell having thus-fabricated metal component for fuel cell.
    Type: Application
    Filed: October 5, 2009
    Publication date: February 11, 2010
    Inventors: Shinobu TAKAGI, Masaki SHINKAWA, Mikio URA, Shinichi YAGI, Yasushi KANETA, Tatsuo HISADA
  • 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: 20090159602
    Abstract: The present invention proposes an austenitic high Mn stainless steel maintaining a hydrogen embrittlement resistance above that of SUS316L and adapted to a low temperature hydrogen environment by being designed in compositions to comprise, by mass %, C: 0.01 to 0.10%, N: 0.01 to 0.40%, Si: 0.1 to 1%, Cr: 10 to 20%, Mn: 6 to 20%, Cu: 2 to 5%, Ni: 1 to 6%, and a balance of Fe and unavoidable impurities and have an Md30 value of an indicator of an austenite stabilization degree satisfying ?120<Md30<20, where Md30=497-462(C+N)-9.2Si-8.1Mn-13.7Cr-20(Ni+Cu)-18.
    Type: Application
    Filed: October 27, 2006
    Publication date: June 25, 2009
    Inventors: Masaharu Hatano, Akihiko Takahashi
  • Publication number: 20090041613
    Abstract: Provided is an Ni-reduced austenite stainless steel having excellent recyclability with no problem of producibility depression to be caused by the surface property thereof and having good workability, season cracking resistance, corrosion resistance and stress corrosion cracking resistance in point of the material characteristics thereof. The steel comprises C in an amount of more than 0.05% (by mass) and within a range of from 0.15 to 0.3% as (C+N), Si in an amount of at most 1%, Mn in an amount of from 0.5 to 2.5%, Ni in an amount of from 3 to 6%, Cr in an amount of from more than 16 to 25% and Cu in an amount of from 0.8 to 4%, and has Md30 of the following formula (1) of from ?50 to 10 and SFE of the following formula (2) of at least 5: Md30=551?462(C+N)?9.2Si?8.1Mn?29(Ni+Cu)?13.7Cr ??(1), SFE=2.2Ni+6Cu?1.1Cr?13Si?1.2Mn+32 ??(2).
    Type: Application
    Filed: August 5, 2008
    Publication date: February 12, 2009
    Inventors: Satoshi Suzuki, Yasutoshi Hideshima, Teruhiko Suetugu, Tomohisa Watanabe
  • Publication number: 20090022617
    Abstract: A low-nickel austenitic stainless steel is provided which comprises by weight: ?0.08% C, 4.0˜5.0% Mn, 0.7˜1.0% Si, 3.5˜4.5% Ni, 16.0˜18.0% Cr, 3.0˜3.50% Cu, ?0.045% S, ?0.030% P, impurity elements in the total amount of ?0.2%, and Fe as the balance. This low-nickel austenitic stainless steel has decreased nickel content, but retains excellent mechanical properties and corrosion resistance property. Therefore, the cost for producing the stainless steel can be reduced remarkably. The method for producing the low-nickel austenitic stainless steel is also provided.
    Type: Application
    Filed: October 5, 2007
    Publication date: January 22, 2009
    Inventor: Hyunku Kim
  • 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
  • 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: 6780258
    Abstract: A new austenitic stainless steel containing approximately 0.1-1.0 mass % of Si and not more than approximately 0.003 mass % of Al. Nonmetallic inclusions dispersed in a steel matrix are converted to MnO—SiO2—Al2O3 containing not less than approximately 15 mass % of SiO2 and not more than approximately 40 mass % of Al2O3. During steel making, molten steel is covered with basic slag and heavily deoxidized with a Si alloy whose Al content is controlled to not more than approximately 1.0 mass % in a vacuum or non-oxidizing atmosphere. The austenitic stainless steel sheet can be formed to an objective shape without the occurrence of cracking due to its decrease in susceptibility to cracking and its good formability.
    Type: Grant
    Filed: January 8, 2002
    Date of Patent: August 24, 2004
    Assignee: Nisshin Steel Co., Ltd.
    Inventors: Junichi Katsuki, Teruyoshi Iida, Takashi Yamauchi, Satoshi Suzuki, Naoto Hiramatsu
  • Patent number: 6620377
    Abstract: Disclosed is a high hardness stainless steel suitable as the material for screws used in fastening parts of magnetic memory devices such as hard disk drives. The stainless steel consists essentially of, by weight %, C: 0.03-0.15%, Si: 0.1-1.2%, Mn: 11.0-19.0%, P: up to 0.06%, S: up to 0.03%, Ni: 2.0-7.0%, Cr: 16.5-19.0%, N: 0.20-0.45% and the balance of Fe and inevitable impurities. This stainless steel exhibits improved hardness and anti-seizure property better than those of conventionally used SUS XM7. The steel may further contain at least one member of Al: up to 0.05%, Mg: 0.001-0.05%, Ca: 0.001-0.05%, V: 0.03-0.30% and Nb: 0.03-0.30%; and one or both of Cu: 1.0-4.0% and Mo: 0.5-5.0%.
    Type: Grant
    Filed: May 14, 2001
    Date of Patent: September 16, 2003
    Inventor: Hideyuki Ohma
  • Publication number: 20030021716
    Abstract: Austenitic stainless steel for cold working suitable for later machining, characterized by the following composition by weight:
    Type: Application
    Filed: July 25, 2002
    Publication date: January 30, 2003
    Applicant: USINOR
    Inventors: Jean-Michel Hauser, Raphael Craen
  • Patent number: 6440579
    Abstract: Process for producing a drawn wire, in particular a wire for reinforcing tires, having a diameter of less than 0.3 mm by drawing a base wire rod having a diameter of greater than 5 mm or a predrawn base wire made of steel with the following composition by weight: carbon≦40×10−3% nitrogen≦40×10−3%, the carbon and nitrogen satisfying the relationship C+N≦50×10−3%, 0.2%≦silicon≦1.0%, 0.2%≦manganese≦5%, 9%≦nickel≦12%, 15%≦chromium≦20%, 1.5%≦copper≦4%, sulfur≦10×10−3%, phosphorus<0.050%, 40×10−4%≦total oxygen≦120×10−4%, 0.1×10−4%≦aluminum≦20×10−4%, magnesium≦5×10−4%, 0.
    Type: Grant
    Filed: February 18, 1998
    Date of Patent: August 27, 2002
    Assignees: Ugine Savoie Societe de Production Internationale de Trefiles, Sprint Metal
    Inventors: Jean-Michel Hauser, Joël Marandel, Etienne Havette
  • Patent number: 6110421
    Abstract: A non-magnetic stainless steel, which contains stably a large amount of N, is excellent in the corrosion resistance and the strength and possible to obtain sound ingots and products, consists by weight percentage of C.ltoreq.0.08%, Si.ltoreq.0.50%, 13%.ltoreq.Mn.ltoreq.16%, P.ltoreq.0.040%, S.ltoreq.0.030%, 0.35%.ltoreq.Cu.ltoreq.1.00%, 2.50%.ltoreq.Ni.ltoreq.5.50%, 17.0%.ltoreq.Cr.ltoreq.19.0%, 0.5%.ltoreq.Mo+W.ltoreq.1.0%, 0.38%.ltoreq.N.ltoreq.0.60%, 0.ltoreq.0.0100%, sol-Al.ltoreq.0.05% and the balance Fe on condition that86(Ni+Cu).gtoreq.13Cr+19Mo+9W+2Mn.
    Type: Grant
    Filed: September 13, 1999
    Date of Patent: August 29, 2000
    Assignee: Daido Tokushuko Kabushiki Kaisha
    Inventors: Tetsuya Shimizu, Michio Okabe
  • Patent number: 6033497
    Abstract: A highly pitting resistant duplex stainless steel alloy is provided which compromises in weight percentages: C: 0.10% and below; Si: 1.5% and below; Mn: 2.0% and below; Cr: 25.0% to 27.0%; Ni: 5.0% to 7.5%; Cu: 1.5% to 3.5%; N: 0.15% and below; Mo: 0.5% and below; and the remaining portion being substantially iron and unavoidable impurities. This alloy has greatly improved machinability when treated in the mold after casting by an accelerated heat treatment, as compared to the same alloy composition that is very slowly control cooled in a tightly closed heat treatment furnace.
    Type: Grant
    Filed: August 31, 1998
    Date of Patent: March 7, 2000
    Assignee: Sandusky International, Inc.
    Inventors: Edward R. Ryan, John C. Rogers
  • Patent number: 5985209
    Abstract: A martensitic steel for a line pipe having excellent corrosion resistance and weldability is disclosed. The martensitic steel contains about:0.02 wt % or less of C, 0.50 wt % or less of Si,0.2 to 3.0 wt % of Mn, 10 to 14 wt % of Cr,0.2 to 7.0 wt % of Ni, 0.2 to 5.0 wt % of Mo,0.1 wt % or less of Al, 0.07 wt % or less of N, andthe balance being Fe and incidental impurities; andthese elements satisfy substantially the following equations:(Cr %)+(Mo %)+0.1(N %)-3(C %).gtoreq.12.2,(Cr %)+3.5(Mo %)+10(N %)+0.2(Ni %)-20(C %).gtoreq.14.5, and150(C %)+100(N %)-(Ni %)-(Mn %).ltoreq.4.The martensitic steel may further contain at least one element selected from the group consisting ofabout 2.0 wt % or less of Cu, about 0.15 wt % or less of Ti, about 0.15 wt % or less of Zr, about 0.15 wt % or less of Ta andabout 0.006 wt % or less of Ca, andthese elements satisfy substantially the following equations:(Cr %)+(Mo %)+0.1(N %)+3(Cu %)-3(C %).gtoreq.12.2,(Cr %)+3.5(Mo %)+10(N %)+0.2(Ni %)-20(C %).gtoreq.14.
    Type: Grant
    Filed: March 21, 1997
    Date of Patent: November 16, 1999
    Assignee: Kawasaki Steel Corporation
    Inventors: Mitsuo Kimura, Yukio Miyata, Tomoya Koseki, Takaaki Toyooka, Fumio Murase
  • Patent number: 5753179
    Abstract: A steel for exhaust valves comprises C: 0.50-0.65 wt %, Si: 0.1-0.3 wt %, Mn: 5.0-8.0 wt %, Cr: 22.0-24.0 wt %, Ni: 5.0-7.0 wt %, Cu: 0.4-1.0 wt %, Mo: 0.4-2.0 wt %, W: 0.4-2.0 wt %, Nb: 0.4-2.0 wt %, Ti: 0.1-0.3 wt %, N: 0.35-0.50 wt %, sol. Al: 0.005-0.03 wt %, B: 0.001-0.01 wt %, provided that (Cu+Ni): 5.8-7.6 wt %, and the balance being Fe and inevitable impurities and has excellent high-temperature strength, corrosion resistance at room and higher temperatures and oxidation resistance.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: May 19, 1998
    Assignees: Tohoku Steel Co., Ltd., Fuji Oozx Inc.
    Inventors: Yoshitaka Nishizawa, Akihiro Hamada, Shinichi Umino
  • Patent number: 5686044
    Abstract: An austenitic stainless steel for press forming has considerably excellent deep drawability and bulging property as compared with those of the conventional one, which comprises C: 0.01-0.10 wt %, Si: not more than 1.0 wt %, Mn: not more than 3.0 wt %, Ni: 6.0-10.0 wt %, Cr: 15.0-19.0 wt %, Cu: 1.0-4.0 wt %, Al: 0.2-2.5 wt %, N: not more than 0.05 wt %, and if necessary, Mo: 0.03-3.0 wt % and B: 0.0010-0.020 wt %, and is adjusted to satisfy anyone of Ni equivalent: 21.0-23.0, crystal grain size number (N) of not less than 8, cleanness of 0.020%, low Si content and (C+N) amount .gtoreq.0.04.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: November 11, 1997
    Assignee: Nippon Yakin Kogyo Co., Ltd.
    Inventors: Yuji Ikegami, Qinzhong Zhang
  • 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: 5456770
    Abstract: An amorphous magnetic alloy of a composition represented by Fe.sub.a Si.sub.b B.sub.c Sn.sub.x, where 60<a.ltoreq.90, 1.ltoreq.b.ltoreq.19, 6.ltoreq.c.ltoreq.20, 0.01.ltoreq.x<10 (atomic %) and a+b+c+x=100.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: October 10, 1995
    Assignee: Nippon Steel Corporation
    Inventors: Takashi Sato, Toshio Yamada, Masahiro Fujikura, Wataru Ohashi, Satoshi Yamashita, Hideo Hagiwara
  • Patent number: 5352406
    Abstract: A properly balanced chemical composition and the choice of a heat treatment (annealing and quenching) under controlled conditions allow to obtain uperduplex stainless steel manufactures which, in the hot-worked form, are excellent in resistance to corrosion and have unit tensile yield strength at room temperature of 90 ksi min.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: October 4, 1994
    Assignees: Centro Sviluppo Materiali S.p.A., Dalmine S.p.A.
    Inventors: Massimo Barteri, Ivan Nembrini
  • Patent number: 5286310
    Abstract: An low-nickel austenitic stainless alloy containing about 16.5 to about 17.5% by weight chromium; about 6.4 to about 8.0% by weight manganese; about 2.5 to about 5.0% by weight nickel; about 2.0 to less than about 3.0% by weight copper; less than about 0.15% by weight carbon; less than about 0.2% by weight nitrogen; less than about 1% by weight silicon; and the balance essentially iron with incidental impurities.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: February 15, 1994
    Assignee: Allegheny Ludlum Corporation
    Inventors: Gary M. Carinci, Ivan A. Franson, Dominic A. Sorace, John P. Ziemianski
  • Patent number: 5252148
    Abstract: A soft magnetic alloy having a composition of general formula:(Fe.sub.1-a Ni.sub.a).sub.100-x-y-z-p-q Cu.sub.x Si.sub.y B.sub.z Cr.sub.p M.sup.1.sub.q (I)wherein M.sup.1 is V or Mn or a mixture of V and Mn, 0.ltoreq.a.ltoreq.0.5, 0.1.ltoreq.x.ltoreq.5, 6.ltoreq.y.ltoreq.20, 6.ltoreq.z.ltoreq.20, 15.ltoreq.y+z.ltoreq.30, 0.5.ltoreq.p.ltoreq.10, and 0.5.ltoreq.q.ltoreq.10 and possessing a fine crystalline phase is suitable as a core, especially a wound core and a compressed powder core.
    Type: Grant
    Filed: August 10, 1992
    Date of Patent: October 12, 1993
    Assignee: TDK Corporation
    Inventors: Masao Shigeta, Asako Kajita, Ippo Hirai, Tsutomu Choh
  • Patent number: 5035855
    Abstract: A martensitic precipitation-hardenable stainless steel essentially consisting of, in weight percent, not more than 0.08% C, 0.5-4.0% Si, not more than 4.0% Mn, 5.0-9.0% Ni, 10.0-17.0% Cr, more than 0.3% and up to 2.5% Mo, 0.15-1.0% Ti, not more than 1.0% Al and not more than 0.03% N and the balance being Fe, and inevitable incidental impurities, which may contain 0.3-2.5% Cu is disclosed. This steel has low hardness before aging and exhibits high strength and good toughness after aging.
    Type: Grant
    Filed: January 4, 1990
    Date of Patent: July 30, 1991
    Assignee: Nisshin Steel Company, Ltd.
    Inventors: Takeshi Utsunomiya, Kazuo Hoshino, Sadao Hirotsu
  • Patent number: 4946644
    Abstract: An austenitic Fe-Cr-Mn-N stainless steel is characterized by a combination of improved castability in terms of yield and speed and the development of excellent strength and ductility levels in the cold worked condition. The low alloy stainless steel consists essentially of, in weight percent, from about 13% to 17% chromium, about 8% to 12% manganese, about 0.05% to 0.2% carbon, about 0.15% to 0.23% nitrogen, about 1.5% maximum nickel, about 1% maximum molybdenum, about 1% maximum silicon, about 1% maximum copper and balance essentially iron. The steel composition is particularly suited for cold-drawn wire which develops an ultimate tensile strength of at least about 250 ksi with elongations of at least about 10%.
    Type: Grant
    Filed: March 3, 1989
    Date of Patent: August 7, 1990
    Assignee: Baltimore Specialty Steels Corporation
    Inventors: William J. Schumacher, James A. Daniels
  • Patent number: 4911883
    Abstract: Stainless steels possessing a superior cold workability and hot workability, which are yet economical. The stainless steels comprise not more than 0.04% carbon, not more than 0.60% silicon, 2.2-3.8% manganese, 2.5-4.0% copper, 6-8% nickel, 17-19% chromium, and the remainder being iron together with impurities. And, not more than 0.002% sulfur is decreased to provide stainless steels which possess superior corrosion resistance, and not more than 0.010% nitrogen are decreased in the stainless steels as required.
    Type: Grant
    Filed: July 8, 1988
    Date of Patent: March 27, 1990
    Assignee: Aichi Steel Work, Ltd.
    Inventors: Kenichi Kumagai, Yoshinobu Honkura, Toru Matsuo, Kouji Murata
  • Patent number: 4880481
    Abstract: Punch and counter punch plates are fabricated from chromium containing alloys, essentially consisting of, each in percent by weight, carbon in the range of 0 to 1.1, silicon in a maximum of 1.0, manganese in a maximum of 1.5, chromium in the range of 11.0 to 17.5, molybdenum in the range of 0 to 1.5, nickel in the range of 0.35 to 10.0, copper in the range of 0 to 4.5, vanadium in the range of 0 to 0.5, cobalt in the range of 0 to 1.5, niobium in the range of 0 to 0.45, titanium in the range of 0 to 1.5, nitrogen in the range of 0 to 0.1, the remainder being iron and impurities resulting from the manufacturing conditions.
    Type: Grant
    Filed: March 11, 1988
    Date of Patent: November 14, 1989
    Assignee: Bohler Ges.m.b.H.
    Inventors: Werner J. Jerlich, Alfred Kugler, Hans Kaiserfeld, Anton Schulhofer, Werner Zechner
  • Patent number: 4849166
    Abstract: There is disclosed a high strength stainless steel consisting essentially of not more than 0.10% C., more than 1.5% and not more than 2.95% Si, less than 0.5% Mn, not less than 4.0% and not more than 8.0% Ni, not less than 12.0% and not more than 18.0% Cr, not less than 0.5% and not more than 3.5% Cu, not more than 0.15% N and not more than 0.004% S, wherein the total content of C and N is not less than 0.10%, the balance is Fe and incidental impurities, said steel satisfies the relations A'>42, and 35<Md(N)<95, wherein A'=17.times.(C % / Ti %)+0.70.times.(Mn %)+1 x-(Ni %)+0.60.times.(Cr %)+0.76 (Cu %)-0.063.times.(Al %) and Md(N)=580-520 (C %)-2 (Si %)-16 (Mn %)-16 (Cr %)-23 (Ni %)-300 (N %)-26 (Cu %). This steel is inexpensive and can be provided with high strength and high ductility by cold working and aging.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: July 18, 1989
    Assignee: Nisshin Steel Company, Ltd.
    Inventors: Kazuo Hoshino, Sadao Hirotsu, Sadayuki Nakamura
  • Patent number: 4822556
    Abstract: A nonmagnetic austenitic stainless steel and articles such as drill collars or boat shafts fabricated therefrom, the steel having a 0.2% yield strength of at least 100 ksi (689 N/mm.sup.2), improved resistance to intergranular stress corrosion, good ductility, good corrosion resistance and low magnetic permeability, and consisting essentially of, in weight percent, from greater than 0.05% to about 0.10% carbon, greater than 14% to about 18% manganese, about 15% to about 20% chromium, about 1% to about 3.5% nickel, about 0.3% to about 0.55% nitrogen, about 0.10% to about 0.5% vanadium, about 1.0% maximum copper, about 1.0% maximum molybdenum, about 1.0% maximum silicon, about 0.04% maximum phosphorous, about 0.03% maximum sulfur, and balance essentially iron.
    Type: Grant
    Filed: February 26, 1987
    Date of Patent: April 18, 1989
    Assignee: Baltimore Specialty Steels Corporation
    Inventors: James N. Cordea, Joseph C. Jasper, Harshad V. Sheth