Abstract: Austenitic stainless steel includes 16 to 26 wt % of chromium (Cr), 8 to 22 wt % of nickel (Ni), 0.02 to 0.1 wt % of carbon (C), 0.2 to 1 wt % of niobium (Nb), and 2 to 3.5 wt % of manganese (Mn), and has an austenite matrix, wherein a nanosized niobium carbide (NbC) is precipitated in the austenite matrix, and the nanosized niobium carbide is uniformly dispersed in the austenite matrix. The austenitic stainless steel may further include 0.5 to 1.5 wt % of molybdenum (Mo).

Abstract: The present invention relates to a high-entropy alloy especially having excellent low-temperature tensile strength and elongation by means of having configured, through thermodynamic calculations, an alloy composition region having an FCC single-phase microstructure at 700° C. or higher, and enabling the FCC single-phase microstructure at room temperature and at an ultra-low temperature. The high-entropy alloy, according to the present invention, comprises: Cr: 3-18 at %; Fe: 3-60 at %; Mn: 3-40 at% ; Ni: 20-80 at %: 3-12 at %; and unavoidable impurities, wherein the ratio of the V content to the Ni content (V/Ni) is 0.5 or less.

Abstract: Disclosed herein is stainless steel having excellent tensile strength, fatigue strength, oxidation resistance at high temperature environment. According to an exemplary embodiment of the present invention, the stainless steel having excellent oxidation resistance at high temperature includes C: 0.01 to 0.2%, Si: 0.1 to 1.0%, Mn: 0.1 to 2.0%, Cr: 12.0 to 30.0%, V: 0.01 to 0.5%, Nb: 0.01 to 0.5%, Al: 0.1 to 4.0%, Co: 0.01 to 5.0%, Mo: 0.01 to 4.0%, W: 0.01 to 4.0%, B: 0.001 to 0.15%, Ni: 5.0 to 20.0% as wt %, the balance Fe, and other inevitable impurities.

Abstract: To provide an inexpensive heat-resisting steel for engine valves by causing Fe-based heat-resisting steel to exhibit high temperature strength not inferior to that of Ni-based heat-resisting steel. A heat-resisting steel for engine valves excellent in high temperature strength containing, in % by mass, C: 0.20 to 0.50%, Si: 1.0% or less, Mn: 5.0% or less, P: 0.1 to 0.5%, Ni: 8.0 to 15.0%, Cr: 16.0 to 25.0%, Mo: 2.0% or less (including 0%), Cu: 0.5% or less, Nb: 1.0% or less (including 0%), W: 2.0% or less (including 0%), N: 0.02 to 0.30%, B: 0.01% or less, and remnants of Fe and impurities, wherein the heat-resisting steel for engine valves satisfies formulae below: 156.42P(%)+0.91Mo(%)+0.73W(%)?12.27Nb(%)+220.96N(%)+120.59?170??Formula (1) 13.70P(%)?6.97Mo(%)?4.32W(%)?3.29Nb(%)+119.10N(%)+27.75?25??Formula (2).

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

Abstract: There is provided an austenitic stainless steel for high-pressure hydrogen gas consisting, by mass percent, of C: 0.10% or less, Si: 1.0% or less, Mn: 3% or more to less than 7%, Cr: 15 to 30%, Ni: 10% or more to less than 17%, Al: 0.10% or less, N: 0.10 to 0.50%, and at least one kind of V: 0.01 to 1.0% and Nb: 0.01 to 0.50%, the balance being Fe and impurities, wherein in the impurities, the P content is 0.050% or less and the S content is 0.050% or less, the tensile strength is 800 MPa or higher, the grain size number (ASTM E112) is No. 8 or higher, and alloy carbo-nitrides having a maximum diameter of 50 to 1000 nm are contained in the number of 0.4/?m2 or larger in cross section observation.

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.

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.

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.

Abstract: A heat resistant alloy comprising, in % by weight, over 0.6% to not more than 0.9% of C, up to 2.5% of Si, up to 3.0% of Mn, 20 to 28% of Cr, 8 to 55% of Ni, 0.01 to 0.8% of Ti and 0.05 to 1.5% of Nb, the balance being Fe and inevitable impurities, the value of (Ti+Nb)/C being 0.12 to 0.29 in atomic % ratio. When the alloy further contains up to 0.5% of Zr, the value of (Ti+Nb+Zr)/C is 0.12 to 0.29 in atomic % ratio. When the alloy is heated at a temperature of at least about 800 degrees C., a fine Ti—Nb—Cr carbide or Ti—Nb—Zr—Cr carbide precipitates within grains to thereby retard creep deformation and give an improved creep rupture strength. The alloy is therefore suitable as a material for hydrogen production reforming tubes.

Abstract: An austenitic stainless steel HTUPS alloy includes, in weight percent: 15 to 30 Ni; 10 to 15 Cr; 2 to 5 Al; 0.6 to 5 total of at least one of Nb and Ta; no more than 0.3 of combined Ti+V; up to 3 Mo; up to 3 Co; up to 1 W; up to 0.5 Cu; up to 4 Mn; up to 1 Si; 0.05 to 0.15 C; up to 0.15 B; up to 0.05 P; up to 1 total of at least one of Y, La, Ce, Hf, and Zr; less than 0.05 N; and base Fe, wherein the weight percent Fe is greater than the weight percent Ni wherein said alloy forms an external continuous scale comprising alumina, nanometer scale sized particles distributed throughout the microstructure, said particles comprising at least one composition selected from the group consisting of NbC and TaC, and a stable essentially single phase fcc austenitic matrix microstructure, said austenitic matrix being essentially delta-ferrite-free and essentially BCC-phase-free.

Abstract: An austenitic stainless steel alloy includes, in weight percent: >4 to 15 Mn; 8 to 15 Ni; 14 to 16 Cr; 2.4 to 3 Al; 0.4 to 1 total of at least one of Nb and Ta; 0.05 to 0.2 C; 0.01 to 0.02 B; no more than 0.3 of combined Ti+V; up to 3 Mo; up to 3 Co; up to 1W; up to 3 Cu; up to 1 Si; up to 0.05 P; up to 1 total of at least one of Y, La, Ce, Hf, and Zr; less than 0.05 N; and base Fe, wherein the weight percent Fe is greater than the weight percent Ni, and wherein the alloy forms an external continuous scale including alumina, nanometer scale sized particles distributed throughout the microstructure, the particles including at least one of NbC and TaC, and a stable essentially single phase FCC austenitic matrix microstructure that is essentially delta-ferrite-free and essentially BCC-phase-free.

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.

Abstract: An austenitic stainless steel displaying high temperature oxidation and creep resistance has a composition that includes in weight percent 15 to 21 Ni, 10 to 15 Cr, 2 to 3.5 Al, 0.1 to 1 Nb, and 0.05 to 0.15 C, and that is free of or has very low levels of N, Ti and V. The alloy forms an external continuous alumina protective scale to provide a high oxidation resistance at temperatures of 700 to 800° C. and forms NbC nanocarbides and a stable essentially single phase fcc austenitic matrix microstructure to give high strength and high creep resistance at these temperatures.

Abstract: An austenitic stainless steel excellent in intergranular corrosion resistance and stress corrosion cracking resistance, comprising: C: 0.005 wt % or less; Si: 0.5 wt % or less; Mn: 0.5 wt % or less; P: 0.005 wt % or less; S: 0.005 wt % or less; Ni: 15.0 to 40.0 wt %, Cr: 20.0 to 30.0 wt %, N: 0.01 wt % or less; O: 0.01 wt % or less; and the balance of Fe and inevitable impurities, wherein the content of B included in the inevitable impurities is 3 wt ppm or less.

Abstract: A high-strength stainless steel, having good mechanical properties and corrosion resistance in a high-pressure hydrogen gas environment, and excellent in stress corrosion cracking resistance, and a container or other device for high-pressure hydrogen gas, which is made of the said stainless steel, are provided. The stainless steel is characterized in that it consists of, by mass %, C: not more than 0.02%, Si: not more than 1.0%, Mn: 3 to 30%, Cr: more than 22% but not more than 30%, Ni: 17 to 30%, V: 0.001 to 1.0%, N: 0.10 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 following relationship [1]: 5Cr+3.4 Mn?500 N??[1].

Abstract: An austenitic stainless steel alloy includes, in weight percent: >4 to 15 Mn; 8 to 15 Ni; 14 to 16 Cr; 2.4 to 3 Al; 0.4 to 1 total of at least one of Nb and Ta; 0.05 to 0.2 C; 0.01 to 0.02 B; no more than 0.3 of combined Ti+V; up to 3 Mo; up to 3 Co; up to 1W; up to 3 Cu; up to 1 Si; up to 0.05 P; up to 1 total of at least one of Y, La, Ce, Hf, and Zr; less than 0.05 N; and base Fe, wherein the weight percent Fe is greater than the weight percent Ni, and wherein the alloy forms an external continuous scale including alumina, nanometer scale sized particles distributed throughout the microstructure, the particles including at least one of NbC and TaC, and a stable essentially single phase FCC austenitic matrix microstructure that is essentially delta-ferrite-free and essentially BCC-phase-free.

Abstract: An austenitic stainless steel excellect in high temperature strength and creep rupture ducitility which comprises, on the percent by mass basis, C: 0.03-0.12%, Si: 0.2-2%, Mn: 0.1-3%, P: 0.03% or less, S: 0.01% or less, Ni: more than 18% and less than 25%, Cr: more than 22% and less than 30%, Co: 0.04-0.8%, Ti: 0.002% or more and less than 0.01%, Nb: 0.1-1%, V: 0.01-1%, B: more than 0.0005% and 0.2% or less, sol. Al: 0.0005% or more and less than 0.03%, N: 0.1-0.35% and O (Oxygen): 0.001-0.008%, with the balance being Fe and impurities. The austenitic stainless steel may contain a specified amount of one or more element(s) of Mo and W, and/or a specified amount of one or more element(s) of Mg, Zr, Ca, REM, Pd and Hf.

Abstract: An austenitic stainless steel excellent in high temperature strength, high temperature ductility and hot workability, consisting of, by mass %, C: more than 0.05% to 0.15%, Si: 2% or less, Mn: 0.1 to 3%, P: 0.04% or less, S: 0.01% or less, Cr: more than 20% to less than 28%, Ni: more than 15% to 55%, Cu: more than 2% to 6%, Nb: 0.1 to 0.8%, V: 0.02 to 1.5%, sol. Al: 0.001 to 0.1%, but sol.Al?0.4×N, N: more than 0.05% to 0.3% and O (Oxygen): 0.006% or less, but O?1/(60×Cu), and the balance Fe and impurities. The austenitic stainless steel may contain at least one of Co, Mo, W, Ti, B, Zr, Hf, Ta, Re, Ir, Pd, Pt and Ag, and/or at least one of Mg, Ca, Y, La, Ce, Nd and Sc.

Abstract: Austenitic alloy for high-temperature strength with improved pourability and manufacturing, of which the composition comprises, in weight-%: 0.010%<carbon<0.04% 0%<nitrogen<0.01% silicon<2% 16%<nickel<19.9% manganese<8% 18.1%<chromium<21% 1.8%<titanium<3% molybdenum<3% copper<3% aluminum<1.5% boron<0.01% vanadium<2% sulfur<0.2% phosphorous<0.04% and possibly up to 0.5% of at least one element chosen from among yttrium, cerium, lanthanum and other rare earths, the remainder being iron and impurities resulting from manufacturing or deoxidizing, the said composition also satisfying the two following relationships: in relationship to the solidification mode: remainder a=eq. Nia?0.5×eq. Cra<3.60 where eq. Cra=Cr+0.7×Si+0.2×Mn+1.37×Mo+3×Ti+6×Al+4×V, and where eq. Nia=Ni+22×C+0.5×Cu, in relationship to the rate of residual ferrite: remainder b=eq. Nib?2×eq. Crb>?41 where eq. Crb=Cr+0.7×Si+1.37×Mo+3×Ti+6×Al+4×V, and where eq. Nib=Ni+22×C+0.5×Cu+0.

Abstract: This invention relates to a steel composition comprising, expressed in percentages by weight: 0.25-0.35% C, 24-28% Cr, 10-15% Ni, 3-6% Mn, 1.75-2.50% Nb, 0.50-0.70% N, 0-0.30% Si, provided that C+N≧0.8%, the rest consisting mainly of iron and unavoidable impurities. The invention further relates to a method for making said compositions and valves produced from said compositions or using said method and exhibiting excellent mechanical strength and oxidation resistance at temperatures between 800 and 900° C.

Abstract: A CF8C type stainless steel alloy and articles formed therefrom containing about 18.0 weight percent to about 22.0 weight percent chromium and 11.0 weight percent to about 14.0 weight percent nickel; from about 0.05 weight percent to about 0.15 weight percent carbon; from about 2.0 weight percent to about 10.0 weight percent manganese; and from about 0.3 weight percent to about 1.5 weight percent niobium. The present alloys further include less than 0.15 weight percent sulfur which provides high temperature strength both in the matrix and at the grain boundaries without reducing ductility due to cracking along boundaries with continuous or nearly-continuous carbides. The disclosed alloys also have increased nitrogen solubility thereby enhancing strength at all temperatures because nitride precipitates or nitrogen porosity during casting are not observed.

Abstract: The invention concerns a steel composition comprising, expressed in weight percentages: 0.25-0.35% of C, 24-28% of Cr. 10-15% of Ni, 3-6% of Mn, 1.75-2.50% of Nb, 0.50-0.70% of N, 0-0.30% of Si, provided that C+N≧0.8%, the rest consisting mainly of iron and unavoidable impurities. The invention also concerns a method for making said compositions and valves produced from said compositions or using said method and exhibiting excellent mechanical strength and oxidation resistance at temperatures between 800 and 900° C.

Abstract: A heat-resistant cast steel excellent in resistance to surface spalling and in high-temperature strength, and useful, for example, as a material for forming the trunk portions of coiler drums for use in reversing hot rolling mills. The steel consists essentially of, in % by weight, 0.1 to 0.6% of C, over 0% to not more than 2% of Si, over 0% to not more than 4% of Mn, 24.5 to 32% of Cr, 13 to 25% of Ni, 0.5 to 2% of Nb and 0.1 to 0.25% of N, the balance being substantially Fe. When desired, the steel further comprises, in % by weight, at least one element selected from the group consisting of 0.02 to 0.2% of Al, 0.01 to 0.2% of Ti and 0.01 to 0.2% of Zr.

Abstract: The invention relates to a high strength, vanadium-containing stainless steel alloy in which the amounts of the alloy elements have been balanced such that the austenite phase remains stable without being deformed into martensite even under large reductions. The steel alloy comprises 0.04-0.25 % C, 0.1-2 % Si, 2-15 % Mn, 16-23 % Cr, 8-14 % Ni, 0.10-1.5 % N, 0.1-2.5 % V, the remainder being iron and normal impurities.

Abstract: An austenitic, stainless steel alloy having a good combination of galling resistance and corrosion resistance is disclosed containing in weight percent about:______________________________________ Broad Intermediate Preferred ______________________________________ C 0.25 max. 0.02-0.15 0.05-0.12 Mn 3-10 4-8 5-7 Si 2.25-5 2.5-4.5 3-4 Cr 15-23 16.5-21 17.5-19 Ni 2-12 4-10 6-9 Mo 0.5-4.0 0.5-2.5 0.75-1.5 N 0.35 max. 0.05-0.25 0.10-0.20 ______________________________________and the balance of the alloy is essentially iron. This alloy also has good resistance to formation of deformation-induced martensite as indicated by the alloy's low work-hardening rate and low magnetic permeability when cold-rolled to a 50% reduction in cross-sectional area.

Abstract: The invention relates to a high strength, vanadium-containing stainless steel alloy in which the amounts of the alloy elements have been balanced such that the austenite phase remains stable without being deformed into martensite even under large reductions. The steel alloy comprises 0.04-0.25% C, 0.1-2% Si, 2-15% Mn, 16-23% Cr, 8-14% Ni, 0.10-1.5% N, 0.1-2.5% V, the remainder being iron and normal impurities.

Abstract: A high-strength, heat-resistant steel with improved formability is disclosed, which consists essentially of, by weight %:______________________________________ C: 0.05-0.30%, Si: not greater than 3.0%, Mn: not greater than 10%, Cr: 15-35%, Ni: 15-50%, Mg: 0.001-0.02%, B: 0-0.01%, Zr: 0-0.10%, Ti: 0-1.0%, Nb: 0-2.0%, Al: 0-1.0%, and Mo: 0-3.0%, W: 0-6.0%, (Mo + 1/2 W = 3.0% or less) ______________________________________a balance of Fe and incidental impurities, of the impurities, oxygen and nitrogen being restricted to 50 ppm or less and 200 ppm or less, respectively, and the austenite grain size number being restricted to No. 4 or coarser.

Abstract: A heat, corrosion and wear resistant austenitic steel and article made therefrom is disclosed containing in weight percent about______________________________________ w/o ______________________________________ Carbon 0.35-1.50 Manganese 3.0-10.0 Silicon 2.0 max. Phosphorus 0.10 max. Sulfur 0.05 max. Chromium 18-28 Nickel 3.0-10.0 Molybdenum Up to 10.0 Vanadium Up to 4.0 Boron Up to 0.03 Nitrogen 0.25 min. Tungsten Up to 8.0 Niobium 1.0 max. ______________________________________the balance being essentially iron. To attain the unique combination of properties provided by the present alloy w/o C+w/o N must be at least about 0.7, w/o V+0.5 (w/o Mo)+0.25 (w/o W) must be about 0.8-9.0.

Abstract: A needle alloy wherein the nickel content is between 6.3% and 9.5%, the chromium content is between 11.5% and 12.5% and the molydenum content is between 3% and 4%. In addition, tantalum and titanium should be present at a combined level of no more than 2.1%. Favorable results from this alloy cause needles to have a greater than 400,000 psi ultimate tensile strength.

Abstract: A low Si high-temperature strength steel tube with improved ductility and toughness which consists essentially of: not more than 0.10 wt % of carbon (C), not more than 0.15 wt % of silicon (Si), not more than 5 wt % of maganese (Mn), 20 to 30 wt % of cromium (Cr), 15 to 30 wt % of nickel (Ni), 0.15 to 0.35 wt % of nitrogen (N), 0.10 to 1.0 wt % of niobium (Nb) and not more than 0.005 wt % of oxygen (O.sub.2); and at least one of 0.020 to 0.1 wt % of aluminum (Al) and 0.003 to 0.02 wt % of magnesium (Mg) in an amount defined by the following formula:0.006 (%).ltoreq.1/5Al(%)+Mg(%).ltoreq.0.020 %the balance being Fe and inevitable impurities.

Abstract: An austenitic stainless steel exhibiting improved resistance to corrosion caused by nitric acid is disclosed, which consists essentially of:C: not more than 0.03% by weight, Si: 2-6% by weight,Mn: 0.1-8% by weight, Cr: 20-35% by weight,Ni: 17-50% by weight, Mg: not more than 0.02%,at least one of Nb, Ti and Ta in the total amount of 8.times.C(%) or more, but 1.0% by weight or less,S: not more than 0.003% by weight,Oxygen: not more than 0.003% by weight,N: not more than 0.03% by weight,P: not more than 0.02% by weight,Fe and incidental impurities: balancethe composition further satisfying the following relationships;-10.ltoreq.Ni(Bal).ltoreq.-0.1Cr(%).gtoreq.(7/4)Si(%)+16.5Mg(%)-0.75.times.S(%)-1.5.times.Oxygen(%).gtoreq.0wherein, Ni(Bal)=30.times.C(%)+0.5.times.Mn(%)+Ni(%)+8.2-1.1.times.[1.5.times.Si(%) +Cr(%)].

Abstract: This invention relates to an improvement on material of a shroud for gas turbines. The material comprises 0.25-0.7 wt % C, 20-35 wt % Cr, 20-40 wt % Ni and balance Fe, and has an austenitic structure. The amount of the .sigma.-phase in this invention is less than 5% and Nv value (Electron Vacancy Number) is less than 2.8.