Class / Patent application number | Description | Number of patent applications / Date published |
148325000 | Nine percent or more chromium containing | 24 |
20090007991 | Ferritic Heat-Resistant Steel - Disclosed is a ferritic heat-resistant steel which has the following chemical composition (by weight): C: 0.01-0.10%; Si: 0.30-1.0%; P: 0.02 or less; S: 0.010% or less; Mn: 0.2-1.2%; Ni: 0.3% or less; Cr: 8.0-11.0%; Mo: 0.1-1.2%; W: 1.0-2.5%; V: 0.10-0.30%; Nb: 0.02-0.12%; Co: 0.01-4.0%; N: 0.01-0.08%; B: not less than 0.001% and less than 0.010%; Cu: 0.3% or less; and Al: 0.010% or less, provided that the chemical composition satisfies the following equations: Mo(%)+0.5×W(%)=1.0-1.6, and C(%)+N(%)=0.02-0.15%, and which comprises a tempered martensite single-phase tissue produced by thermal refining. The steel shows an excellent long-term creep rupture strength even when used at a steam temperature around 650˚C and also has excellent steam oxidizability. When the value represented by the equation: Al(%)+0.1×Ni(%) is adjusted to 0.02 or less, the creep strength can be more stabilized. | 01-08-2009 |
20110017355 | FERRITIC HEAT-RESISTANT STEEL - Disclosed is a ferritic heat-resistant steel which has the following chemical composition (by weight): C: from 0.01% to less than 0.08%; Si: 0.30-1.0%; P: 0.02 or less; S: 0.010% or less; Mn: 0.2-1.2%; Ni: 0.3% or less; Cr: 8.0-11.0%; Mo: 0.1-1.2%; W: 1.0-2.5%; V: 0.10-0.30%; Nb: 0.02-0.12%; Co: 0.01-4.0%; N: 0.01-0.08%; B: not less than 0.001% and less than 0.010%; Cu: 0.3% or less; and Al: 0.010% or less, provided that the chemical composition satisfies the following equations: Mo (%)+0.5×W (%)=1.0-1.6, and C (%)+N (%)=0.02-0.15%, and which comprises a tempered martensite single-phase tissue produced by thermal refining and contains 30% by weight or less of δ ferrite. | 01-27-2011 |
20110030851 | LOW-CARBON MARTENSITIC CHROMIUM-CONTAINING STEEL - A material for brake discs has temper softening resistance sufficient to maintain a hardness of HRC 31 or more after tempering at 700° C. for one hour. The low-carbon martensitic chromium-containing steel contains 0.02% to 0.10% of carbon and 0.02% to 0.10% of nitrogen, the total content of carbon and nitrogen being 0.08% to 0.16%; 0.5% or less of silicon; 0.1% or less of aluminum; 0.3% to 3.0% of manganese; 10.5% to 13.5% of chromium; 0.05% to 0.60% of niobium and 0.15% to 0.80% of vanadium, the total content of niobium and vanadium being 0.25% to 0.95%; 0.02% to 2.0% of nickel; and 1.5% or less of copper, and has an Fp value (=−230C+5Si−5Mn−6Cu+10Cr−12Ni+32Nb+22V+12Mo+8W+10Ta+40Al−220N) of 80.0 to 96.0, a hardness after quenching of HRC 31 to 40, and a hardness after tempering at 700° C. for one hour of HRC 31 or more. | 02-10-2011 |
20110132499 | FERRITE SYSTEM HEAT-RESISTANT CAST STEEL AND EXHAUST SYSTEM COMPONENT - The ferrite system heat-resistant cast steel and the exhaust system component are provided, which are inexpensive and are able to improve the reliability by largely improving the toughness under normal temperature and thermal fatigue performance. The ferrite system heat-resistant cast steel includes composition structure comprised, percent by mass, of 0.1% to 0.4% carbon, 0.5% to 2.0% silicon, 0.2% to 1.2% manganese, 0.3% or less phosphorus, 0.01% to 0.4% sulfur, 14.0% to 21.0% chrome, 0.05% to 0.6% niobium, 0.01% to 0.8% aluminum, 0.15% to 2.3% nickel, residual iron and inevitable impurities. | 06-09-2011 |
20120024430 | HIGH-STRENGTH STAINLESS STEEL PIPE - A stainless steel material having compositions which contain on the basis of percent by mass, C from 0.04 to 0.12%, Ni from 0 (including a case of no addition) to 5.0%, Cr from 12.0 to 17.0%, N from 0.0 to 0.10%, Si from 0.2 to 2.0%, Mn at 2.0% or less, Cu from 0.0 to 2.0%, P at 0.06% or less, S at 0.006% or less, with residue being Fe and unavoidable impurities. Further, a parent phase has any one of a single phase structure of ferrite phase or martensite phase and a diploid phase structure of ferrite phase and martensite phase. An end of the base material is melt-welded. as a joint to form a pipe. The parent phase is provided with carbide uniformly separated at grain boundaries and within grains, with a dissolved amount of C being 0.03% by mass or less. | 02-02-2012 |
20120273092 | METHOD FOR MANUFACTURING A HOT PRESS-HARDENED COMPONENT, USE OF A STEEL PRODUCT FOR MANUFACTURING A HOT PRESS-HARDENED COMPONENT AND HOT PRESS-HARDENED COMPONENT - A method of manufacturing a hot press-hardened component comprises the following production steps: a) providing a steel product produced at least in sections from a stainless steel comprising of the following composition (specified in % wt.) C: 0.010-1.200%, P: up to 0.1%, S: up to 0.1%, Si: 0.10-1.5%, Cr: 10.5-20.0% and optionally one or more elements from the group “Mn, Mo, Ni, Cu, N, Ti, Nb, B, V, Al, Ca, As, Sn, Sb, Pb, Bi, H” with the requirement Mn: 0.10-3.0%, Mo: 0.05-2.50%, Ni: 0.05-8.50%, Cu: 0.050-3.00%, N: 0.01-0.2%, Ti: up to 0.02%, Nb: up to 0.1%, B: up to 0.1%, V: up to 0.2%, Al: 0.001-1.50%, Ca: 0.0005-0.003%, As: 0.003-0.015%, Sn: 0.003-0.01%, Sb: 0.002-0.01%, Pb: up to 0.01%, Bi: up to 0.01%, H: up to 0.0025%, remainder iron and unavoidable impurities; b) heating the steel product to an austenisation temperature above the Ac3 temperature of the stainless steel; c) hot press-hardening the heated steel product in a pressing die to form the component; and d) cooling at least one section of the component at a cooling rate that is high enough for a martensitic structure to form in each section that is rapidly cooled. | 11-01-2012 |
20130092293 | LEAN AUSTENITIC STAINLESS STEEL - 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 MD | 04-18-2013 |
20130240091 | METHOD FOR REDUCING FORMATION OF ELECTRICALLY RESISTIVE LAYER ON FERRITIC STAINLESS STEELS - A method of reducing the formation of electrically resistive scale on a an article comprising a silicon-containing ferritic stainless subjected to oxidizing conditions in service includes, prior to placing the article in service, subjecting the article to conditions under which silica, which includes silicon derived from the steel, forms on a surface of the steel. Optionally, at least a portion of the silica is removed from the surface to placing the article in service. A ferritic stainless steel alloy having a reduced tendency to form silica on at least a surface thereof also is provided. The steel includes a near-surface region that has been depleted of silicon relative to a remainder of the steel. | 09-19-2013 |
148326000 | Age or precipitation hardened or strengthened | 9 |
20080210344 | Precipitation Hardenable Martensitic Stainless Steel - A precipitation hardenable stainless chromium nickel steel is disclosed having the following composition in weight %: | 09-04-2008 |
20080314480 | Martensitic Stainless Steel Strengthened By Ni3tin-Phase Precipitation - A precipitation-hardened stainless maraging steel which exhibits a combination of strength, toughness, and corrosion resistance comprises by weight about: 8 to 15% chromium (Cr), 2 to 15% cobalt (Co), 7 to 14% nickel (Ni), and up to about 0.7% aluminum (Al), less than about 0.4% copper (Cu), 0.5% to 2.5% molybdenum (Mo), 0.4 to 0.75% titanium (Ti), up to about 0.5% tungsten (W), and up to about 120 wppm carbon (C), the balance essentially iron (Fe) and incidental elements and impurities, characterized in that the alloy has a predominantly lath martensite microstructure essentially without topologically close packed intermetallic phases and strengthened primarily by a dispersion of intermetallic particles primarily of the eta-Ni3Ti phase and wherein the titanium and carbon (Ti) and (C) levels are controlled such that C can be dissolved during a homogenization step and subsequently precipitated during forging to provide a grain-pinning dispersion. | 12-25-2008 |
20090120536 | Ferritic Stainless steel material for automobile exhaust gas passage components - To provide a ferritic stainless steel material for automobile exhaust gas passage components usable in a high-temperature range over 900° C. and even over 950° C. The ferritic stainless steel material has excellent heat resistance and low-temperature toughness and has a composition comprising, in terms of % by mass, at most 0.03% of C, at most 1% of Si, from 0.6 to 2% of Mn, at most 3% of Ni, from 10 to 25% of Cr, from 0.3 to 0.7% of Nb, from more than 1 to 2% of Cu, from 1 to 2.5% of Mo, from 1 to 2.5% of W, at most 0.15% of Al, from 0.03 to 0.2% of V, and at most 0.03% of N, and optionally containing any of B, Co, W, Ti, Zr, REM and Ca with a balance of Fe and inevitable impurities, and the composition satisfies restrictive formulae 1.2Nb+5Mo+6Cu≧11.5 and 15Nb+2Mo+0.5Cu≧10.5. The steel material has a texture where the total amount of Nb and Mo existing as a precipitation phase is at most 0.2% by mass. | 05-14-2009 |
20100193083 | HYDROGEN-RESISTANT HIGH STRENGTH MATERIAL AND METHOD FOR PRODUCING THE SAME - A hydrogen-resistant high strength material made of a Ni-based alloy or an Fe—Ni-based alloy includes an aged portion and a hydrogen embrittlement suppressing layer that is to be exposed to hydrogen. The hydrogen embrittlement suppressing layer has a hydrogen embrittlement index of not less than 0.9, wherein the hydrogen embrittlement index is defined as a ratio of an elongation after hydrogen charging in relation to an elongation before hydrogen charging. The aged portion has a tensile strength exceeding 1000 MPa. | 08-05-2010 |
20100218856 | Cr-Containing Steel Superior in Heat Fatigue Charateristics - The present invention provides Cr-containing steel superior in heat fatigue characteristics, that is, Cr-containing steel superior in heat fatigue characteristics, characterized by containing, by mass %, C: 0.01% or less, N: 0.015% or less, Si: 0.8 to 1.0%, Mn: 0.2 to 1.5%, P: 0.03% or less, S: 0.01% or less, Ni: 0.2% or less, Cu: 0.2% or less, Cr: 13 to 15%, Mo: 0.1% or less, Nb: 0.3 to 0.5%, Ti: 0.05 to 0.2%, V: 0.01 to 0.2%, Al: 0.015 to 1.0%, and B: 0.0002 to 0.0010%, satisfying (Nb+1.9×Ti)/(C+N)≦50, and having a balance of Fe and unavoidable impurities, wherein a 0.2% yield strength at 800° C. after aging at 800° C. for 100 hours or more is 20 MPa or more and a drawability value at 200° C. is 35% or more and wherein a soluble Nb amount+soluble Ti amount after aging at 800° C. for 100 hours or more is 0.08% or more. | 09-02-2010 |
20120160373 | FORGING HEAT RESISTANT STEEL, MANUFACTURING METHOD THEREOF, FORGED PARTS AND MANUFACTURING METHOD THEREOF - A forging heat resistant steel of an embodiment contains in percent by mass C: 0.05-0.2, Si: 0.01-0.1, Mn: 0.01-0.15, Ni: 0.05-1, Cr: 8 or more and less than 10, Mo: 0.05-1, V: 0.05-0.3, Co: 1-5, W: 1-2.2, N: 0.01 or more and less than 0.015, Nb: 0.01-0.15, B: 0.003-0.03, and a remainder comprising Fe and unavoidable impurities. | 06-28-2012 |
20120241051 | PRECIPITATION HARDENED HEAT-RESISTANT STEEL - The present invention relates to a precipitation hardened heat-resistant steel containing, in terms of % by mass: 0.005 to 0.2% of C, not more than 2% of Si, 1.6 to 5% of Mn, 15% or more and less than 20% of Ni, 10 to 20% of Cr, more than 2% and up to 4% of Ti, 0.1 to 2% of Al, and 0.001 to 0.02% of B, with the balance being Fe and inevitable impurities, in which a ratio (Ni/Mn) of an amount of Ni to an amount of Mn is 3 to 10, a total amount of Ni and Mn (Ni+Mn) is 18% or more and less than 25%, and a ratio (Ti/Al) of an amount of Ti to an amount of Al is 2 to 20. | 09-27-2012 |
20140007981 | PRECIPITATION HARDENING TYPE MARTENSITIC STAINLESS STEEL, ROTOR BLADE OF STEAM TURBINE AND STEAM TURBINE - A precipitation hardening type martensitic stainless steel of an embodiment contains: Cr: 8.5 to 12.5%; Mo: 1 to 2%; Ni: 8.5 to 11.5%; Ti: 0.6 to 1.4%; C: 0.0005 to 0.05%; Al: 0.0005 to 0.25%; Cu: 0.005 to 0.75%; Nb: 0.0005 to 0.3%; Si: 0.005 to 0.75%; Mn: 0.005 to 1%; and N: 0.0001 to 0.03% by mass, and the balance of Fe and unavoidable impurities. | 01-09-2014 |
20160138123 | PRECIPITATION-HARDENED STAINLESS STEEL ALLOYS - Forged precipitation-hardened stainless steel alloys are provided. The forged precipitation-hardened stainless steel alloy can include, by weight, about 14.0% to about 16.0% chromium, about 6.0% to about 8.0% nickel, about 1.25% to about 1.75% copper, about 1.0% to about 2.0% molybdenum, about 0.001% to about 0.05% carbon, a carbide forming element in an amount of about 0.3% to about 0.8% and greater than about 8 times that of carbon, the balance iron, and incidental impurities. Generally, the carbide forming element is selected from the group consisting of titanium, zirconium, tantalum, and a mixture thereof. | 05-19-2016 |
148327000 | Eight percent or more total content of nickel and/or manganese containing | 7 |
20100154939 | AUSTENITIC STAINLESS STEEL AND PROCESS FOR REMOVING HYDROGEN THEREFROM - By focusing on the non-diffusible hydrogen that causes hydrogen embrittlement of austenitic stainless steel, the present invention provides an austenitic stainless steel in which the non-diffusible hydrogen is removed by maintaining the austenitic stainless steel in a vacuum of 0.2 Pa or less and heating at a heating temperature of 200° C. to 500° C. for 460 hours or less to remove the hydrogen (H) contained therein to a level of 0.00007 mass % (0.7 mass ppm) or less. | 06-24-2010 |
20100230011 | AUSTENITE-TYPE STAINLESS STEEL HOT-ROLLING STEEL MATERIAL WITH EXCELLENT CORROSION RESISTANCE, PROOF-STRESS, AND LOW-TEMPERATURE TOUGHNESS AND PRODUCTION METHOD THEREOF - An austenitic stainless steel hot-rolled steel material can be provided which has sea-water resistance and strength superior to conventional steel. Low-temperature toughness can be maintained, which is preferable in a structural member of speedy craft. The steel material can include an austenitic stainless steel hot-rolled steel material which excels in the properties of corrosion resistance, proof stress, and low-temperature toughness. In such austenitic stainless steel hot-rolling steel material, e.g., PI [=Cr+3.3(Mo+0.5W)+16N] ranges from 35 to 40, δ cal [=2.9(Cr+0.3Si+Mo+0.5W)−2.6(Ni+0.3Mn+0.25Cu+35C+20N)−18] ranges from −6 to +2, and a 0.2% proof stress at room temperature is not less than 550 MPa, Charpy impact value measured using a V-notch test piece at −40° C. is not less than 100 J/cm2, and the pitting potential measured in a deaerated aqueous solution of 10% NaCl at 50° C. (Vc'100) is not less than 500 mV (as it relates to saturated Ag/AgCl). | 09-16-2010 |
20110024003 | High strength corrosion resistant steel - A quenched and tempered high strength, corrosion resistant steel suitable for aircraft landing gears and structures, having a unique combination of mechanical and corrosion resistant properties: ultimate tensile strength of 295 to 305 ksi, yield strength of 225 to 235 ksi; elongation of 12 to 13.5%, reduction of area of 34 to 36%, Charpy v-notch impact toughness energy of about 14 to 16 ft-lb, fracture toughness of 55 to 60 ksiVin, and corrosion resistance in salt spray test. | 02-03-2011 |
20110253262 | CORROSION-RESISTANT AUSTENITIC STEEL ALLOY - 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. | 10-20-2011 |
20130167978 | Alloy of a Golf Club - An alloy of a golf club comprises 0.25 wt % to 1.0 wt % Si, 0.25 wt % to 1.5 wt % Mn, 2.0 wt % to 3.5 wt % Cu, 6.0 wt % to 8.0 wt % Ni, 15.5 wt % to 18.0 wt % Cr, balance iron and inevitable impurities, wherein the alloy of a golf club has austenite structures, ferrite structures, and martensite structures simultaneously. | 07-04-2013 |
20160201527 | VALVE SEAT | 07-14-2016 |
20190144981 | Austenitic Stainless Steel and Production Method Therefor | 05-16-2019 |