Abstract: A process for producing low carbon chromium iron alloys directly from chromite concentrates wherein superheated liquid aluminum is flowed in a controlled manner into a reaction vessel preheated to a temperature of approximately 1,000° C. while simultaneously feeding chromite concentrates preheated to a temperature in the same range at a controlled rate into the preheated reaction vessel. The ratio of chromite to aluminum is controlled to be at or above the stoichiometric ratio required to reduce the oxide from chromium and iron to low carbon ferrochrome alloy. Burnt lime is continuously added to the vessel in an amount sufficient to form and flux a slag of the eutectic composition known as calcium aluminate.

Abstract: The present invention relates a high-strength nonmagnetic stainless steel, containing, by weight percent, 0.01 to 0.06% of C, 0.10 to 0.50% of Si, 20.5 to 24.5% of Mn, 0.040% or less of P, 0.010% or less of S, 3.1 to 6.0% of Ni, 0.10 to 0.80% of Cu, 20.5 to 24.5% of Cr, 0.10 to 1.50% of Mo, 0.0010 to 0.0050% of B, 0.010% or less of O, 0.65 to 0.90% of N, and the remainder being Fe and inevitable impurities; the steel satisfying the following formulae (1) to (4): [Cr]+3.3×[Mo]+16×[N]?30??(1), {Ni}/{Cr}?0.15??(2), 2.0?[Ni]/[Mo]?30.0??(3), and [C]×1000/[Cr]?2.5??(4), wherein [Cr], [Mo], [N], [Ni], [Mo] and [C] represent the content of Cr, the content of Mo, the content of N, the content of Ni, the content of Mo and the content of C in the steel, respectively, and {Ni} represents the sum of [Ni], [Cu] and [N], and {Cr} represents the sum of [Cr] and [Mo]. The present invention further relates to a high-strength nonmagnetic stainless steel part containing the steel and a process for producing the same.

Abstract: An austenitic stainless steel having low nickel and molybdenum and exhibiting comparable corrosion resistance and formability properties to higher nickel and molybdenum alloys comprises, in weight %, up to 0.20 C, 2.0-9.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 1.0-5.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities, the steel having a ferrite number of less than 10 and a MD30 value of less than 20° C.

Abstract: An austenitic heat-resisting cast steel is disclosed which is composed mainly of Fe and including 0.4˜0.6 wt % of C, 0.5˜1.0 wt % of Si, 2.1˜2.9 wt % of Mn, 2.1˜2.9 wt % of Ni, 18˜22 wt % of Cr, 1.0˜2.0 wt % of Nb, 2.0˜3.0 wt % of W, 0.25˜0.35 wt % of N and other inevitable impurities. More specifically, this austenitic heat-resisting cast steel can beneficially be applied to an exhaust manifold of an automobile to realize a maximum allowable exhaust gas temperature of the exhaust manifold is 950° C.˜1050° C.

Abstract: The present invention relates to high-nitrogen duplex stainless steels with an excellent eco-index and pitting corrosion resistance, in particular, to providing duplex stainless steels with ferrite-austenite phases, including: 16.5-19.5 wt. % of chromium (Cr), 2.3-3.5 wt. % of molybdenum (Mo), 1.0-5.5 wt. % of tungsten (W), 5.5-7.0 wt. % of manganese (Mn), 0.35-0.45 wt. % of nitrogen (N), with a remainder of iron (Fe). The high nitrogen duplex stainless steels with excellent eco-index and pitting corrosion resistance according to the present invention use manganese (Mn) and nitrogen (N) to exclude or mostly substitute Ni, which increases price instability of the steel grades and environment burden, to result in enhancing economic efficiency, price stability and eco-friendliness.

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.

Abstract: An austenitic stainless cast steel having a volume fraction of a ferrite phase of 0.1-5.0%.

Abstract: A wear-resistant material which comprises certain concentrations of carbon, nitrogen, oxygen, niobium/tantalum as well as other metallic elements. The material comprises a metal matrix and hard phases embedded therein. The hard phases comprise one or more of carbides, nitrides, carbonitrides, and oxide carbonitrides and have a diameter of from about 0.2 ?m to about 50 ?m. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

Abstract: A low Ni and high N austenitic-ferritic stainless steel is disclosed. It includes an austenitic-ferritic stainless steel having high formability and punch stretchability, crevice corrosion resistance, corrosion resistance at welded part, or excellent intergranular corrosion resistance, from a stainless steel structured by mainly austenite phase and ferrite phase, and consisting essentially of 0.2% or less C, 4% or less Si, 12% or less Mn, 0.1% or less P, 0.03% or less S, 15 to 35% Cr, 3% or less Ni, and 0.05 to 0.6% N, by mass, by adjusting the percentage of the austenite phase in a range from 10 to 85%, by volume. Furthermore, it includes an austenitic-ferritic stainless steel having higher formability by adjusting the amount of (C+N) in the austenite phase to a range from 0.16 to 2% by mass.

Abstract: Stainless steel alloys for fabricating endoprostheses. Endoprostheses can include a variety of devices such as staples, orthodontic wires, heart valves, filter devices, and stents, many of which devices are diametrically expandable devices.

Abstract: The invention relates to a powder metallurgically manufactured steel with a chemical composition containing, in % by weight: 0.01-2 C, 0.6-10 N, 0.01-3.0 Si, 0.01-10.0 Mn, 16-30 Cr, 0.01-5 Ni, 0.01-5.0 (Mo+W/2), 0.01-9 Co, max. 0.5 S and 0.5-14 (V+Nb/2), where the contents of N on the one hand and of (V+Nb/2) on the other hand are balanced in relation to each other such that the contents of these elements are within an area that is defined by the coordinates A?, B?, G, H, A?, where the coordinates of [N, (V+Nb/2)] are: A?: [0.6,0.5]; B?: [1.6,0.5]; G: [9.8,14.0]; H: [2.6,14.0], and max. 7 of (Ti+Zr+Al), balance essentially only iron and impurities at normal amounts. The steel may be used for tools for injection molding, compression molding and extrusion of components of plastics, and cold working.

Abstract: An iron (Fe)-based austenitic heat-resistant cast steel includes, based on a total of 100 mass % (indicated below simply as “%”): 0.4 to 0.8% of carbon (C), 3.0% or less of silicon (Si), 0.5 to 2.0% of manganese (Mn), 0.05% or less of phosphorus (P), 0.03 to 0.2% of sulfur (S), 18 to 23% of chromium (Cr), 3.0 to 8.0% of nickel (Ni) and 0.05 to 0.4% of nitrogen (N). A ratio of chromium (Cr) to carbon (C) is in a range of 22.5?Cr/C?57.5. The cast steel includes one or two or more of vanadium (V), molybdenum (Mo), tungsten (W) and niobium (Nb) in a total amount of less than 0.2%.

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.

Abstract: An austenitic stainless steel having low nickel and molybdenum and exhibiting comparable corrosion resistance and formability properties to higher nickel and molybdenum alloys comprises, in weight %, up to 0.20 C, 2.0-9.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 1.0-5.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities, the steel having a ferrite number of less than 10 and a MD30 value of less than 20° C.

Abstract: Corrosion resistant, manganese-stabilized austenitic stainless steels with a low nickel content are used in bipolar plates, methods for fabricating the bipolar plates, and polymer electrolyte membrane (PEM) fuel cells comprising the bipolar plates. The bipolar plates are formed from high-manganese austenitic stainless steels comprising, in weight percents, 4.0 to 35 manganese, 0.5 to 1.5 nickel, 17 to 20 chromium, 0.2 to 0.5 nitrogen, up to 0.075 carbon, 0.5 to 1.0 silicon, up to 0.1 aluminum, 0 to 0.005 sulfur, and balance iron and incidental impurities. The steels exhibit suitable corrosion resistance, electrical contact resistance, and mechanical properties for high-corrosion applications such as use in bipolar plate materials for PEM fuel cells. The bipolar plates may comprise a solid plate of the steel, optionally coated with a highly electrically conductive material.

Abstract: Disclosed is a low-cost metal substrate which is resistant to high-temperature oxidation, has excellent strength, is non-magnetic and is ideal for a high-temperature superconducting wire to be used at or lower than liquid nitrogen temperature. Austenitic stainless steel containing 0.4 weight or more of nitrogen is used as the metal substrate for the superconducting wire. After heat treatment of 700 to 950° C. in the high-temperature superconducting layer formation step is carried out, the metal substrate has an extremely high 0.20 proof stress at liquid nitrogen temperature.

Abstract: The invention relates to a powder metallurgically manufactured steel with a chemical composition containing, in % by weight: 0.01-2 C, 0.6-10 N, 0.01-3.0 Si, 0.01-10.0 Mn, 16-30 Cr, 0.01-5 Ni, 0.01-5.0 (Mo+W/2), 0.01-9 Co, max. 0.5 S and 0.5-14 (V+Nb/2), where the contents of N on the one hand and of (V+Nb/2) on the other hand are balanced in relation to each other such that the contents of these elements are within an area that is defined by the coordinates A?, B?, G, H, A?, where the coordinates of [N, (V+Nb/2)] are: A: [0.6,0.5]; B?: [1.6,0.5]; G: [9.8,14.0]; H: [2.6,14.0], and max. 7 of (Ti+Zr+Al), balance essentially only iron and impurities at normal amounts. The steel is intended to be used in the manufacturing of tools for injection moulding, compression moulding and extrusion of components of plastics, and for tools for cold working, which are exposed to corrosion.

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.

Abstract: The present invention relates to a stainless steel alloy, more specifically a duplex stainless steel alloy with a ferritic-austenitic matrix and high corrosion resistance in combination with good structure stability, specifically a duplex stainless steel with a ferrite content of 40-65% and a well balanced analysis and with a combination of high corrosion resistance and good mechanical properties, such as high ultimate strength and good ductility which is especially suitable for use in applications in oil and gas explorations such as wire, especially as reinforced wire in wireline applications. These purposes are achieved according to the invention by a duplex stainless steel alloy that contains (in wt %): C 0-0.03%; Si up to max 0.5%; Mn 0-3.0%; Cr 24.0-30.0%; Ni 4.9-10.0%; Mo 3.0-5.0%; N 0.28-0.5%; S up to max. 0.010%; Co 0-3.5%; W 0-3.0%; Cu 0-2%; Ru 0-0.3%; Al 0-0.03; Ca 0-0.010%; the balance being Fe and unavoidable impurities.

Abstract: Corrosion resistant, manganese-stabilized austenitic stainless steels with a low nickel content are used in bipolar plates, methods for fabricating the bipolar plates, and polymer electrolyte membrane (PEM) fuel cells comprising the bipolar plates. The bipolar plates are formed from high-manganese austenitic stainless steels comprising, in weight percents, 4.0 to 35 manganese, 0.5 to 1.5 nickel, 17 to 20 chromium, 0.2 to 0.5 nitrogen, up to 0.075 carbon, 0.5 to 1.0 silicon, up to 0.1 aluminum, 0 to 0.005 sulfur, and balance iron and incidental impurities. The steels exhibit suitable corrosion resistance, electrical contact resistance, and mechanical properties for high-corrosion applications such as use in bipolar plate materials for PEM fuel cells. The bipolar plates may comprise a solid plate of the steel, optionally coated with a highly electrically conductive material.

Abstract: The present disclosure relates to the use of a duplex stainless steel as heat exchanger material in a phosphoric acid production system using the wet method. The steel has the following composition in percent by weight: C max 0.03 Si max 0.5 Mn max 3 Cr 26-29 Ni 4.9-10 Mo 3-5 N 0.35-0.5 B max 0.0030 Co max 3.5 W max 3 Cu max 2 Ru max 0.3 balance Fe and normal occurring impurities.

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.

Abstract: In an intermediate piece for connecting molded articles of manganese steel with carbon steel, in particular austenitic manganese steel casting frogs with standard rails, the intermediate piece is comprised of steel from the group of austenitic-ferritic duplex steels having a ferrite portion of <60 wt %. The method for connecting austenitic manganese steel castings with standard rails is characterized in that an austenitic-ferritic intermediate piece made of duplex steel comprising <60% ferrite is welded with the manganese steel casting and the standard rail.

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.

Abstract: Novel carbon-plus-nitrogen corrosion-resistant ferrous and austenitic alloys, apparatus incorporating an inventive alloy, and methods of making and using the apparatus are described. The corrosion-resistant ferrous and austenitic alloys comprise no greater than about 4 wt. % nickel, are characterized by a strength greater than about 700 MPa (100 ksi), and, when being essentially free of molybdenum (<0.3 wt. %), have minimum Pitting Resistance Equivalence (PRE) numbers of 20 and minimum Measure of Alloying for Corrosion Resistance numbers (MARC) of 30 because of the use of both carbon and nitrogen. The ferrous and austenitic alloys are particularly formulated for use in oilfield operations, especially sour oil and gas wells and reservoirs. This abstract allows a searcher or other reader to quickly ascertain the subject matter of the disclosure. It will not be used to interpret or limit the scope or meaning of the claims.

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.

Abstract: Alloy compositions suitable for fabricating medical devices, such as stents, are disclosed. In certain embodiments, the compositions have small amounts of nickel, e.g., the compositions can be substantially free of nickel.

Abstract: The combined alloying of a CrMnMo steel with carbon and nitrogen creates a stainless austenitic steel of high strength which according to the invention contains (in % by mass) 16-21 Cr, 16-21 Mn, 0.5-2.0 Mo, 0.8-1.1 C+N at a C/N ratio of 0.5-1.1 The steel is subjected to open melting and is suited for uses exhibiting one or more of the following features: strength, ductility, corrosion resistance, wear resistance, non-magnetizability.

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.

Abstract: The use of a steel alloy for the production of fittings, particularly screw- or push-fit fitting, valves or compression joints as well as corresponding fittings, particularly screw- or push-fit fittings, valves or compression joints for fluid or drinking water ducting systems is described. Low-cost production of fittings, valves and compression joints at the same time with improved corrosion resistance is achieved by the use of a steel alloy, which beside iron has the following content of alloying constituents in weight percent: C?0.05%, 11%?Cr?25%, Ni<5%, Mn?2%, N?0.25%.

Abstract: A duplex stainless steel for use in urea manufacturing plants, in mass %, consisting of C: 0.03% or less, Si: 0.5% or less, Mn: 2% or less, P: 0.04% or less, S: 0.003% or less, Cr: 26% or more, but less than 28%, Ni: 6-10%, Mo: 0.2-1.7%, W: more than 2%, but no more than 3%, N: more than 0.3%, but no more than 0.4%, with the balance being Fe and impurities, in which the content of Cu as an impurity is not more than 0.3%. The duplex stainless steel may also have Ca, Ce, and B content, and it is desirable that levels of Al and O (oxygen) as an impurities be no more than 0.05% and 0.01% respectively. Further, it is preferable that an increase in the Vickers hardness of the steel should not be more than 80, before and after the solution treated steel is subjected to the heat treatment of 800° C. for 30 minutes and subsequent water cooling. This duplex stainless steel possesses a high corrosion resistance.

Abstract: Process for manufacturing cylindrical hollow bodies with a circular cross-section using solid rough material of corrosion-resistant, martensitic chromium steels. A remelting block is produced and a tube blank is made therefrom, the tube blank being formed into a tube at hot forming temperature by extrusion at a deformation ratio of at least 6. Hollow bodies are cut from the resultant tube.

Abstract: Austenitic steel contains from 0.01 to 0.04% by weight of carbon, from 21.00 to 24.00% by weight of chromium, from 0.25 to 5 0.65% by weight of silicon, from 0.25 to 0.70% by weight of manganese, from 1.00 to 1.40% by weight of nitrogen, the balance being iron, the total content of ferrite-forming components in the steel, namely, of silicon and chromium, and the total content of austenite-forming components therein, namely, of carbon, 10 nitrogen and manganese, obeying the following condition: 0.48 ⁢ [Si] + [Cr] 30 ⁢ [C] + 18 ⁢ [N] + 0.

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.

Abstract: The present invention relates to a duplex stainless steel alloy with austenite-ferrite structure, which in hot extruded and annealed finish shows high strength, good corrosion resistance, as well as good weldability which is characterized in that the alloy contains in weight-% max 0.05% C, 0-2.0% Si 0-3.0% Mn, 25-35% Cr, 4-10% Ni, 2-6% Mo, 0.3-0.6% N, as well as Fe and normally occurring impurities and additions, whereby the content of ferrite is 30-70%.

Abstract: The invention relates to a ferrite-austenitic alloy and its use, the alloy has a composition with a mixture defined as: C maximum 0.05%, Si maximum 0.8%, Mn 0.30-1.5%, Cr 28.0-30.0%, Ni 5.80-7.40%, Mo 2.00-2.50%, N 0.30-0.40%, Cu maximum 1.0%, W maximum 2.0%, S maximum 0.010%, 30-70% ferrite and the balance austenite for tubes filled with hydraulic fluid, as transport tubes for solutions for chemical injection, or another uses in the application of umbilicals.

Abstract: A high-hardness martensitic stainless steel excellent in corrosion resistance, comprising less than 0.15% by weight of C, from 0.10 to 1.0% by weight of Si, from 0.10 to 2.0% by weight of Mn, 0.010% or less of S, from 12.0 to 18.5% by weight of Cr, from 0.40 to 0.80% by weight of N, less than 0.030% by weight of Al, less than 0.020% by weight of O, and substantially the balance of Fe. The martensitic stainless steel of the present invention has cold-workability and hardness after tempering higher than that of SUS420J2 and corrosion resistance equivalent to or higher than that of an austenitic stainless steel SUS316.

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%.

Abstract: A method of providing corrosion resistance, structural stability, mechanical strength and workability in applications with aggressive environments such as chloride-containing environments, are realized by providing at least one article formed from a composition which includes (in weight- %) up to 0.03% C, up to 0.5% Si, 24.0-30.0% Cr, 4.9-10.0% Ni, 3.0-5.0% Mo, 0.28-0.5% N, 0-3.0% Mn, 0-0.0030% B, up to 0.010%, 0-0.03% Al, 0-0.010% Ca, 0-3.0% W, 0-2.0% Cu, 0-3.5% Co, 0-0.3% Ru, balance Fe and inevitable impurities. The ferrite content is 40 to 65 volume % and a PRE number of at least between 46 and 50 in both the austenite and ferrite phase, and with an optimum ratio or relationship between PRE austenite and PRE ferrite in the range of 0.90 to 1.15; preferably between 0.9 and 1.05.

Abstract: A duplex stainless steel including, in weight percent, up to 0.06 percent carbon, 15 up to less than 25 percent chromium, greater than 3 up to 6 percent nickel, up to 3.75 percent manganese, 0.14 up to 0.35 percent nitrogen, up to 2 percent silicon, greater than 1.4 up to less than 2.5 percent molybdenum, up to less than 0.5 percent copper, up to less than 0.2 percent cobalt, up to 0.05 percent phosphorous, up to 0.005 percent sulfur, and 0.001 up to 0.0035 percent boron, with the remainder being iron and incidental impurities is disclosed. The duplex stainless steel may be included in an article of manufacture, such as a strip, bar, plate, sheet, casting, tubing or piping. A method for making such a duplex stainless steel is also disclosed.

Abstract: Austenitic steel contains from 0.01 to 0.04% by weight of carbon, from 21.00 to 24.00% by weight of chromium, from 0.25 to 5 0.65% by weight of silicon, from 0.25 to 0.70% by weight of manganese, from 1.00 to 1.40% by weight of nitrogen, the balance being iron, the total content of ferrite-forming components in the steel, namely, of silicon and chromium, and the total content of austenite-forming components therein, namely, of carbon, 10 nitrogen and manganese, obeying the following condition: 1 0.48 ⁢ [Si] + [Cr] 30 ⁢ [C] + 18 ⁢ [N] + 0.01 ⁢ [Mn] = from ⁢   ⁢ 0.8 ⁢   ⁢ to ⁢   ⁢ 1.

Abstract: A high-strength, high-toughness martensitic stainless steel sheet has a chemical composition comprising, in mass percent, more than 0.03 to 0.15% of C, 0.2-2.0% of Si, not more than 1.0% of Mn, not more than 0.06% of P, not more than 0.006% of S, 2.0-5.0% of Ni, 14.0-17.0% of Cr, more than 0.03 to 0.10% of N, 0.0010-0.0070% of B, and the balance of Fe and unavoidable impurities and has an A value of not less than −1.8, where A value=30(C+N)−1.5Si+0.5Mn+Ni−1.3Cr+11.8. The suitability of the steel sheet as a gasket material is enhanced by producing it to include not less than 85 vol % of martensite phase and to have a spring bending elastic limit Kb0.1 after application of tensile strain of 0.1% of not less than 700 N/mm2. Edge cracking during cold rolling is inhibited by conducting cold rolling after subjecting the hot-rolled sheet to 600-800 ° C.×10 hr or less intermediate annealing to impart a steel hardness of not greater than Hv 380.

Abstract: The invention concerns a nickel free stainless steel alloy having a ferritic and magnetic structure, characterised in that it contains at least 0.4% in weight of nitrogen, and at most 0.5% in weight of nickel, the remainder being formed of iron and the inevitable impurities. The invention also concerns an external part for a watch made of such a steel alloy.

Abstract: This steel is applicable for making seamless tubes with a high mechanical strength, high pitting resistance and a high hot-formability, by means of a process comprising meltdown in an electric-arc furnace, refining in an AOD converter, ascensional ingot casting and Gothic section billet rolling, and then transforming the billet obtained into seamless tubes by upsetting the gothic billet into a round followed by hot piercing in a vertical press, tube extrusion in a horizontal press, reduction in a stretch reduction mill and Pilger cold-rolling, and having a composition of not more than 0.02% C, 0.65 to 0.85% Mn, 0.40 to 0.60% Si, 25.2 to 25.6% Cr, 6.2 to 6.6% Ni, 3.6 to 3.8% Mo, 0.24 to 0.30% N, not more than 0.025% P, not more than 0.002% S, with no Cu and W, and with the addition of a percentage of B ranging between 0.0015 to 0.0030% and a percentage of Ca ranging between 0.0010 to 0.0050%.

Abstract: An interdental brush wire and an interdental brush which are not buckled or broken, are excellent in durability and manipulation ease due to the springy brush as well as the ability of insertion between teeth characterized in that the wire is a stainless steel wire having a diameter of 0.15 to 0.35 mm and containing nitrogen and a controlled amount of manganese.

Abstract: The invention relates to an austenitic steel alloy which is corrosion-resistant, tough, non-magnetic and compatible with the skin. The invention also relates to a process for the production of said steel alloy and to uses thereof. The characterizing feature of the invention is a steel containing up to 0.3% C, 2 to 26% Mn, 11 to 24% Cr, more than 2.5 to 10% Mo, 0 to 8% W, more than 0.55 to 1.2% N, up to max 0.5% Ni and max 2 % Si, balance iron.

Abstract: A high strength non-magnetic stainless steel comprising by weight ratio, less than 0.20 % C, less than 1.00 % Si, 14-16 % Mn, less than 0.005 % S, 0.2-1.0 % Ni, 15-19 % Cr, 0.30-0.40 % N, and Fe and other impurity elements, of which C+N constitutes 0.40-0.55 % and the Mn equivalent equals 30-33. The stainless steel has a hardness more than Hv 500, a magnetic permeability less than 1.01 after drawing, the steel may be suitably used as the steel for the micro shafts of video tape recorders and electromagnetic valves.

Abstract: A high strength austenitic steel having a yield strength above 600 N/mm.sup.2 at 02% permanent strain, containing about 0.5 to 1.5% by weight of nitrogen, about 6 to 12% by weight cobalt, and less than 5% by weight nickel. The steel is treated at about 1050.degree. C. to 1200.degree. C. and then quenched in water.

Abstract: A stainless duplex ferritic-austenitic steel with improved corrosion resistance. The steel consists essentially of about: 0.03 w/o Max. carbon, 3.0 w/o Max. manganese, 1.0 w/o Max. silicon, 26.0 to 29.0 w/o chromium, 3.5 to 5.2 w/o nickel, 3.5 w/o Max. molybdenum, 0.15 w/o Min. nitrogen and the balance essentially iron. The steel preferably contains about 0.17 to 0.35 w/o nitrogen for improved pitting resistance and for increased austenite content. Welds of the steel preferably contain at least about 17% austenite in the as-welded condition for improved pitting and intergranular corrosion resistance.

Abstract: A galling and corrosion resistant austenitic stainless steel alloy is disclosed containing in weight percent about______________________________________ w/o ______________________________________ Carbon 0.25 Max. Manganese 2.0-7.0 Silicon 1.0-5.0 Phosphorus 0.05 Max. Sulfur 0.3 Max. Chromium 12-20 Nickel 2.0-7.75 Molybdenum 3 Max. Copper 3 Max. Nitrogen 0.35 Max. ______________________________________the balance being essentially iron. To attain its unique properties the alloy must be balanced so as to contain no more than about 10% ferrite. The % Ni+1/2(% Mn) must not be less than 5.5% and not greater than 1/8[11(% Si)+42], and the sum of the (% C+% N) is at least 0.15%. Care must be taken that when the amount of silicon present is less than about 2.25%, at least about 4.0% manganese is present.