Abstract: Provided is a ferritic stainless steel for heat pipes of high-temperature exhaust heat recovery systems, which comprises, in terms of % by mass, from 16 to 32% of Cr, at most 0.03% of C, at most 0.03% of N, at most 3% of Si, at most 2% of Mn, at most 0.008% of S, from 0 to 0.3% of Al, and at least one of at most 0.7% of Nb, at most 0.3% of Ti, at most 0.5% of Zr and at most 1% of V, and optionally at least one of at most 3% of Mo, at most 3% of W, at most 3% of Cu, at most 0.1% of Y, at most 0.1% of REM (rare earth metal) and at most 0.01% of Ca, with a balance of Fe and inevitable impurities, and which satisfies at least the following formula (1), formula (2) and formula (5): Cr+3(Mo+Cu)?20??(1) Cr+3(Si+Mn+Al?Ti)?20??(2) 0.037{(C+N)/(V+Ti+0.5Nb+0.5Zr)}+0.001?0.01??(5).

Abstract: An austenitic stainless steel welded joint, whose base metal and weld metal each comprises, by mass percent, C: not more than 0.3%, Si: not more than 2%, Mn: 0.01 to 3.0%, P: more than 0.04% to not more than 0.3%, S: not more than 0.03%, Cr: 12 to 30%, Ni: 6 to 55%, rare earth metal(s): more than 0.2% to not more than 0.6%, sol. Al: 0.001 to 3% and N: not more than 0.3%, with the balance being Fe and impurities, and satisfies the formula of (Cr+1.5×Si+2×P)/(Ni+0.31×Mn+22×C+14.2×N+5×P)<1.388, in spite of having a high P content and showing the fully austenitic solidification, has excellent resistance to the weld solidification cracking. Therefore, the said austenitic stainless steel welded joint can be widely used in such fields where a welding fabrication is required. Each element symbol in the above formula represents the content by mass percent of the element concerned.

Abstract: An austenitic stainless steel, which comprises by mass %, C<0.04%, Si?1.5%, Mn?2%, Cr: 15 to 25%, Ni: 6 to 30%, N: 0.02 to 0.35%, sol. Al?0.03% and further contains one or more elements selected from Nb?0.5%, Ti?0.4%, V?0.4%, Ta?0.2%, Hf?0.2% and Zr?0.2%, with the balance being Fe and impurities, and among the impurities P?0.04%, S?0.03%, Sn?0.1%, As?0.01%, Zn?0.01%, Pb?0.01% and Sb?0.01%, and satisfy the conditions F1=S+{(P+Sn)/2}+{(As+Zn+Pb+Sb)/5}?0.0075 and 0.05?F2=Nb+Ta+Zr+Hf+2Ti+(V/10)?1.7?9×F1 has not only excellent liquation cracking resistance in the HAZ on the occasion of welding and excellent embrittling cracking resistance in the HAZ during a long period of use at high temperatures but also excellent polythionic acid SCC resistance and high temperature strength.

Abstract: An austenitic stainless steel, which comprises by mass %, C: 0.04 to 0.18%, Si?1.5%, Mn?2.0%, Ni: 6 to 30%, Cr: 15 to 30%, N: 0.03 to 0.35%, sol. Al?0.03% and further contains one or more elements selected from Nb?1.0%, V?0.5% and Ti?0.5%, with the balance being Fe and impurities, and among the impurities P?0.04%, S?0.03%, Sn?0.1%, As?0.01%, Zn?0.01%, Pb?0.01% and Sb?0.01%, and satisfy the conditions P1=S+{(P+Sn)/2}+{(As+Zn+Pb+Sb)/5}?0.06 and 0.2?P2=Nb+2(V+Ti)?1.7?10×P1 has high strength and excellent resistance to cracking due to grain boundary embrittlement in the welded portion during the use at high temperatures. Therefore, the said steel can be suitably used as materials for constructing machines and equipment, such as power plant boilers, which are to be used at high temperatures for a long period of time.

Abstract: A steel composition contains: 0.05% or less of C; 0.5% or less of Si; 0.20% to 1.80% of Mn; 0.03% or less of P; 0.005% or less of S; 14.0% to 18.0% of Cr; 5.0% to 8.0% of Ni; 1.5% to 3.5% of Mo; 0.5% to 3.5% of Cu; 0.05% or less of Al; 0.20% or less of V; 0.01% to 0.15% of N; and 0.006% or less of O on a mass basis, and satisfies the following expressions: Cr+0.65Ni+0.6Mo+0.55Cu?20C?18.5 and Cr+Mo+0.3Si?43.5C?0.4Mn?Ni?0.3Cu?9N?11 (where Cr, Ni, Mo, Cu, C, Si, Mn, and N represent their respective contents (mass %)). After such a steel pipe material is formed into a steel pipe, the steel pipe is quenched by cooling after heating to a temperature of the AC3 transformation point or more and tempered at a temperature of the AC1 transformation point or less. The composition may further contain at least one element of Nb and Ti; at least one element selected from the group consisting of Zr, B, and W; or Ca, singly or in combination.

Abstract: An austenitic stainless steel welded joint, which comprises by mass %, C: 0.05 to 0.25%, Si: not more than 2%, Mn: 0.01 to 3%, P: 0.05 to 0.5%, S: not more than 0.03%, Cr: 15 to 30%, Ni: 6 to 55%, sol. Al: 0.001 to 0.1% and N: not more than 0.03%, with the balance being Fe and impurities, and satisfies the formula of (Cr+1.5×Si+2×P)/(Ni+0.31×Mn+22×C+14.2×N+5×P)?1.388, has high creep strength, and moreover, is economical and excellent in weldability. Therefore, the said austenitic stainless steel welded joint can be widely applied as steel pipes, steel plates and so on in such fields where not only high-temperature strength and corrosion resistance but also weldability is required. Each element symbol in the above formula represents the content by mass percent of the element concerned.

Abstract: A brake disk including, by mass, 0.1% or less of C, 1.0% or less of Si, 2.0% or less of Mn, 10.5% to 15.0% of Cr, 2.0% or less of Ni, greater than 0.5% to 4.0% of Cu, 0.02% to 0.3% of Nb, and 0.1% or less of N and further including N, Nb, Cr. Si, Ni, Mn, Mo, and Cu, the remainder being Fe and unavoidable impurities, such that the following inequalities are satisfied: 5Cr+10Si+15Mo+30Nb?9Ni?5Mn?3Cu?225N?270C<45??(1) 0.03?{C+N?(13/93)Nb}?0.09??(2) and having a martensitic structure having prior-austenite grains with an average diameter of 8 ?m or more, a hardness of 32 to 38 HRC, and high temper softening resistance.

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.

Abstract: A martensitic stainless steel oil country tubular good contains, by mass, 0.005% to 0.1% C, 0.05% to 1% Si, 1.5% to 5% Mn, at most 0.05% P, at most 0.01% S, 9% to 13% Cr, at most 0.5% Ni, at most 2% Mo, at most 2% Cu, 0.001% to 0.1% Al, and 0.001% to 0.1% N, with the balance being Fe and impurities, and the pipe has a Cr-depleted region under the surface. The martensitic stainless steel oil country tubular good according to the present invention does not have a passive film on the surface and corrodes wholly at low speed. In addition, the Ni content is reduced, which allows uneven corrosion to be prevented. Therefore, SCC can be prevented from being generated in spite of the presence of a Cr-depleted region.

Abstract: The present invention provides duplex stainless steel superior in corrosion resistance in a chloride environment and impact properties suitable as a material for pumps for seawater desalination plants, facilities and equipment, and materials for chemical tanks, that is, duplex stainless steel characterized by containing, by mass %, C: 0.06% or less, Si: 0.05 to 3.0%, Mn: 0.1 to 6.0%, P: 0.05% or less, S: 0.010% or less, Ni: 1.0 to 10.0%, Cr: 18 to 30%, Mo: 5.0% or less, Cu: 3.0% or less, N: 0.10 to 0.40%, Al: 0.001 to 0.08% or less, Ti: 0.003 to 0.05%, Mg: 0.0001 to 0.0030%, and O: 0.010% or less, having a product of an activity coefficient fN of N, Ti content, and N content fN×Ti×N of 0.00004%2 or more, and having a product of Ti content and N content Ti×N of 0.008%2 or less.

Abstract: The application describes a lead-free ferritic stainless steel alloy having the following composition, all contents given in percent by weight: C ?0.1 Si ?2 Mn 0.1-2 S 0.08-0.4? Cr 16-25 Ni ?2 Mo 1-5 Cu 0.01-3.0? Ca ?0.006 Sn ?0.15 B ?0.02 X 0.01-0.5 and/or REM 0.01-1 the balance Fe as well as impurities, where X is 2 * Te + 1 * Se + 1 * Bi. The alloy has good machinability and good corrosion resistance, in comparison with the corresponding alloys containing lead.

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.

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, and ??(3) [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].

Abstract: Martensitic stainless steel according to the invention contains, by mass, 0.001% to 0.01% C, at most 0.5% Si, 0.1% to 3.0% Mn, at most 0.04% P, at most 0.01% S, 10% to 15% Cr, 4% to 8% Ni, 2.8% to 5.0% Mo, 0.001% to 0.10% Al, at most 0.07% N, 0% to 0.25% Ti, 0% to 0.25% V, 0% to 0.25% Nb, 0% to 0.25% Zr, 0% to 1.0% Cu, 0% to 0.005% Ca, 0% to 0.005% Mg, 0% to 0.005% La, and 0% to 0.005% Ce, with the balance being Fe and impurities, and the steel satisfies Expressions (1) and (2) and has a yield stress in the range from 758 MPa to 860 MPa. In this way, in the martensitic stainless steel according to the invention, the tempering temperature range at which a yield stress in the range from 758 MPa to 860 MPa can be obtained is increased. 922.6?554.5C?50.9Mn+2944.8P+1.056Cr?81.1Ni+95.8Mo?125.1Ti?1584.9Al?376.1N?600 ??(1) 30C+0.5Mn+Ni+0.5Cu?1.5Si?Cr?Mo+7.

Abstract: Provided is free cutting alloy excellent in machinability, preserving various characteristics as alloy. The free cutting alloy contains: one or more of Ti and Zr as a metal element component; and C being an indispensable element as a bonding component with the metal element component, wherein a (Ti,Zr) based compound including one or more of S, Se and Te is formed in a matrix metal phase. The free cutting alloy is more excellent in machinability, preserving various characteristics as alloy at similar levels to a conventional case. The effect is especially conspicuous, for example, when a compound expressed in a chemical form of (Ti,Zr)4C2(S,Se,Te)2 as the (Ti,Zr) based compound is formed at least in a dispersed state in the alloy structure.

Abstract: Provided is free cutting alloy excellent in machinability, preserving various characteristics as alloy. The free cutting alloy contains: one or more of Ti and Zr as a metal element component; and C being an indispensable element as a bonding component with the metal element component, wherein a (Ti,Zr) based compound including one or more of S, Se and Te is formed in a matrix metal phase. The free cutting alloy is more excellent in machinability, preserving various characteristics as alloy at similar levels to a conventional case. The effect is especially conspicuous, for example, when a compound expressed in a chemical form of (Ti,Zr)4C2(S,Se,Te)2 as the (Ti,Zr) based compound is formed at least in a dispersed state in the alloy structure.

Abstract: A martensitic stainless steel for inexpensive seamless pipe having 655 MPa yield strength, high toughness and excellent corrosion resistance in high CO2 environments, and a method for manufacturing thereof is provided. The steel comprises C:0.005-0.05%, Si:0.1-0.5%, Mn: 0.1-2.0% P: ?0.005%, S: ?0.005%, Cr: 10.0-12.5%, Mo: 0.1-0.5%, Ni: 1.5-3.0%, N: ?0.02%, Al: 0.01-0.1%, by weight, while FI value defined by the formula [FI=Cr+Mo?Ni?30 (C+N)] being 5.00 to 8.49, and balance of substantially Fe. The method comprises the steps of reheating the cooled steel at temperatures from 780° C. to 960° C., quenching the reheated steel, and then tempering the quenched steel at temperatures from 550° C. to 650° C.

Abstract: Provided is free cutting alloy excellent in machinability, preserving various characteristics as alloy. The free cutting alloy contains: one or more of Ti and Zr as a metal element component; and C being an indispensable element as a bonding component with the metal element component, wherein a (Ti,Zr) based compound including one or more of S, Se and Te is formed in a matrix metal phase. The free cutting alloy is more excellent in machinability, preserving various characteristics as alloy at similar levels to a conventional case. The effect is especially conspicuous, for example, when a compound expressed in a chemical form of (Ti,Zr)4C2(S,Se,Te)2 as the (Ti,Zr) based compound is formed at least in a dispersed state in the alloy structure.

Abstract: The present invention provides a detectable heavy duty needle cannula (12) for use in hypodermic syringes and the like. Needle cannula (12) comprises a magnetizable or magnetized stainless steel alloy, which enables needle cannula (12) to be detectable in metal detectors that are commonly used in the meat processing industry to detect broken needle cannulas in the flesh of slaughtered animals. Needle cannula (12) further comprises a sidewall (17) that is thicker than the sidewalls of prior art needle cannulas. The thicker sidewall imparts to needle cannula (12) greater resistance to breakage during the process of injecting animal health products into an animal and greater detectability in a metal detector.

Abstract: Ferritic stainless steel that can be used for ferromagnetic parts, characterized in that it comprises in its composition by weight: C?0.030% 1.0%<Si?3% 0.1%<Mn?0.5% 10%?Cr?13% 0%<Ni<1% 0.03%<S<0.5% 0%<P?0.030% 0.2%<Mo?2% 0%<Cu?0.5% 0%<N?0.030% 0%<Ti?0.5% 0%<Nb?1% 0%<Al?100×10?4% 30×10?4%<Ca?100×10?4% 50×10?4%<O?150×10?4% the ratio of the calcium content to the oxygen content Ca/O being 0.3?Ca/O?1, the balance being ion and the inevitable impurities from the smelting of the steel, and a process for manufacturing ferromagnetic parts.

Abstract: A free-cutting tool steel is provided containing Fe and C in an amount of 0.1 to 2.5 wt %, Ti and or Zr where WTi+0.52WZr constitutes 0.03 to 3.5 wt %, and WTi represents Ti content and WZr represents Zr content, at least any one of S, Se and Te where WS+0.4WSe+0.25WTe constitutes 0.01 to 1.0 wt %, and (WTi+0.52WZr)/(WS+0.4WSe+0.25WTe) constitutes 1 to 4, and WS represents S content, WSe represents Se content and WTe represents Te content; and dispersed therein a texture thereof from 0.1 to 10% in terms of area ratio in a section of a machinability improving compound phase of a metallic element component of Ti and/or Zr as major components, and a binding component for the metallic element component containing C and any one of S, Se and Te.

Abstract: Disclosed is an austenitic stainless cast steel which has such a good heat resistance as can be used at a high temperature higher than 950° C. and a good machinability. The stainless cast steel consists essentially of, by weight %, C: 0.2-0.4%, Si: 0.5-2.0%, Mn: 0.5-2.0%, P: up to 0.10%, S: 0.04-0.2%, Ni: 8.0-42.0%, Cr: 15.0-28.0%, W: 0.5-7.0%, Nb: 0.5-2.0%, Al: up to 0.02%, Ti: up to 0.05%, N: up to 0.15%, Se: 0.001-0.50% and the balance of Fe and inevitable impurities.

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: Resulfurized stainless steel with high machinability and having an improved corrosion resistance, which includes, in its composition, anorthite- and/or pseudo-wollastonite- and/or gehlenite-type lime aluminosilicate inclusions combined with CrMnS inclusions, the chromium content of which is between 30% and 70%.

Abstract: A steel for shaft, which has corrosion resistance, machinability, and straightness at substantially the same levels as those of free cutting steel 12L14 plated with Ni, which has conventionally been used as a steel for shaft, and need not be plated on its surfaces, thus making it possible to reduce the production cost therefor, and which comprises: 0.05% by mass or less of C; 0.15% by mass or less of Si; 0.40% by mass or less of Mn; 6.0 to 10.0% by mass of Cr; 0.10% by mass or less of S; 0.30 to 0.80% by mass of Ni; 0.10 to 0.30% by mass of Pb; 0.001 to 0.10% by mass of N; and the balance of Fe and an unavoidable impurity; and a steel shaft composed of said steel.

Abstract: A heat-resisting weldable alloy consisting essentially of, by weight percent, 01. to 0.4 aluminum, 0.001 to 0.008 calcium, 0.002 to 0.1 magnesium, 0 to 0.08 carbon, 0 to 1 manganese, 0 to 0.002 sulfur, 0 to 1 silicon, 0 to 0.75 copper, 0 to 0.3 phosphorus, 18 to 22 nickel, 18 to 22 chromium, and the balance iron and incidental impurities.

Abstract: The invention is directed to anti-corrosive alloys and relates in particular to an alloy containing cobalt, chromium, aluminum, yttrium, silicon, a metal from the second main group, together with the corresponding oxide, in the following proportions: chromium (Cr) 26.0-30%; aluminum (Al) 5.5-13.0%; yttrium (Y) 0.3-1.5%; silicon (Si) 1.5-4.5%; metal from the second main group (magnesium, calcium, barium, strontium) 0.1-2.0%; oxide of the corresponding metal from the second main group 0.1-2.0%; cobalt (Co) remaining percentage. Preferably, tantalum (Ta) is also added in a proportion of 0.5-4.0%, and the remaining percentage of cobalt is replaced by a remaining percentage of Me, Me being understood to mean a metal which may be nickel (Ni) or iron (Fe) or cobalt (Co) or a composition comprising Ni—Fe—Co, Ni—Fe, Ni—Co, Co—Fe.

Abstract: A method has been developed for surface modifications of high temperature resistant alloys, such as FeCrAl alloys, in order to increase their resistance to corrosion at high temperatures. Coating it with a Ca-containing compound before heat-treating builds a continuos uniform and adherent layer on the surface of the alloy, that the aluminum depletion of the FeCrAl alloy is reduced under cyclic thermal stress. By this surface modification the resistance to high temperature corrosion of the FeCrAl alloy and its lifetime are significantly increased.

Abstract: A ferritic-austenitic two-phase stainless steel consisting essentially of, in wt. %, over 0% to not more than 0.05% of C, 0.1 to 2.0% of Si, 0.1 to 2.0 of Mn, 20.0 to 23.0% of Cr, 3.0 to 3.9% of Ni, 0.5 to 1.4% of Mo, over 0% to not more than 2.0% of Cu and 0.05 to 0.2% of N, the steel further containing, when desired, at least one element selected from the group consisting of over 0% to not more than 0.5% of Ti, over 0% to not more than 0.5% of Nb, over 0% to not more than 1.0% of V, over 0% to not more than 0.5% of Al, over 0% to not more than 0.5% of Zr, over 0% to not more than 0.5% of B, over 0% to not more than 0.2% of a rare-earth element, over 0% to not more than 1.0% of Co, over 0% to not more than 1.0% of Ta and over 0% to not more than 1.0% of Bi, the balance being substantially Fe. Cr, Mo and N are within the range defined by the following expression [i]: Cr+3.

Abstract: A martensitic stainless steel for seamless steel pipes, excellent in descaling property and machinability, having the following chemical composition, by weight %; 0.025 to 0.22% of C, 10.5 to 14% of Cr, 0.16 to 1.0% of Si, 0.05 to 1.0% of Mn, 0.05% or less of Al, 0.100% or less of N, 0.25% or less of V, 0.020% or less of P, 0.004 to 0.015% of S, and the balance Fe and impurities, This steel may include 0.0002 to 0.0050% of B, and/or 0.0005 to 0.005% of Ca. In this case, the upper limit of S may be extended up to 0.018%. Preferably, Al is limited to less than 0.01%.

Abstract: Corrosion-resistant low-nickel austenitic stainless steel having the following compostion in percentages by weight: 0.01%<carbon<0.08%, 0.1%<silicon<1%, 5%<manganese<11%, 15%<chromium<17.5%, 1%<nickel<4%, 1%<copper<4%, 1×10−4%<sulfur<20×10−4%, 1×10−4%<calcium<50×10−4%, 0%<aluminum<0.03%, 0.005%<phosphorus<0.1%, boron<5×10−4%, oxygen<0.01%, the balance being iron and impurities resulting from the smelting operation.

Abstract: The invention relates to medium carbon steels and low alloy steels having a concentration of a machinability enhancing agent (“MEA”), i.e. tin and/or antimony, at its ferrite grain boundaries which enhances the steel's machinability and to processes for producing such steels. The invention encompasses medium carbon steels and low alloy steels characterized by having MEA bulk contents of from about 0.02 to about 0.09 weight percent, by having the sum of the MEA bulk content and the copper bulk content being no greater than about 0.10 weight percent, and by having a microstructure at the time of machining having a concentration of MEA at ferrite grain boundaries in an amount at least about five times the MEA bulk content of the steel.

Abstract: A heat resistant material and a pressure vessel by use thereof, having an excellent high temperature strength so as to be applicable to steam condition of 600.degree. C. or more, are provided. Said material consists of C, Si, Cr, Ni, V, Nb, N, Mo and W in the respective weight percent, and inevitable impurities and Fe, and is further added with Cu, B and Ca and/or Mn, Mn and Cu, B and Ca, in the respective weight percent. Also, a pressure vessel is formed of said materials.

Abstract: Austenitic stainless steel for the production of wire, which can be used in the field of drawing wire down to diameters of less than 0.3 mm and in the field of producing components subjected to fatigue, characterized by the following composition by weight:5.times.10.sup.-3 %.ltoreq.carbon.ltoreq.200.times.10.sup.-3 %5.times.10.sup.-3 %.ltoreq.nitrogen.ltoreq.400.times.10.sup.-3 %0.2%.ltoreq.manganese.ltoreq.10%12%.ltoreq.chromium.ltoreq.23%0.1%.ltoreq.nickel.ltoreq.17%0.1%.ltoreq.silicon.ltoreq.2%,in which the residual elements are controlled so as to obtain inclusions of oxides in the form of a glassy mixture, the proportions by weight of which are as follows:40%.ltoreq.SiO.sub.2 .ltoreq.60%5%.ltoreq.MnO.ltoreq.50%1%.ltoreq.CaO.ltoreq.30%0%.ltoreq.MgO.ltoreq.4%5%.ltoreq.Al.sub.2 O.sub.3 .ltoreq.25%0%.ltoreq.Cr.sub.2 O.sub.3 .ltoreq.4%0%.ltoreq.TiO.sub.2 .ltoreq.4%.

Abstract: An austenoferritic stainless steel with high tensile elongation includes iron and the following elements in the indicated weight amounts based on total weight:carbon<0.04%0.4%<silicon<1.2%2%<manganese<4%0.1%<nickel<1%18%<chromium<22%0.05%<copper<4%sulfur<0.03%phosphorus<0.1%0.1%<nitrogen<0.3%molybdenum<3%the steel having a two-phase structure of austenite and ferrite and comprising between 30% and 70% of austenite, whereinCreq=Cr %+Mo %+1.5 Si %Nieq=Ni %+0.33 Cu %+0.5 Mn %+30 C %+30 N %and Creq/Nieq is from 2.3 to 2.75, and whereinIM=551-805(C+N)%--8.52 Si %--8.57 Mn %--12.51 Cr %--36 Ni %--34.5 Cu %--14 Mo %,IM being from 40 to 115.

Abstract: Austenitic stainless steel having a very low nickel content, of the following composition by weight:Carbon<0.1%0.1%<silicon<1%5%<manganese<9%0.1%<nickel<2%13%<chromium<19%1%<copper<4%0.1%<nitrogen<0.40%5.times.10.sup.-4 %<boron<50.times.10.sup.-4 %phosphorus<0.05%sulfur<0.01%.

Abstract: Improved parts of electronic apparatus made of ferritic free cutting steel, which enjoy high precision in size given by good machinability and free from trouble caused by corrosion of metal due to generation of sulfides. The material steel has an alloy composition consisting essentially of, by weight %, C: up to 0.1%, Si: up to 2.0%, Mn: up to 2.0%, Cr: 19-25% and S: 0.20-0.35% and the balance of Fe and impurities. The parts made by machining can be used without being passivated. The steel may contain, further to the above alloy components, one or more from the following groups: 1) Mo: up to 4.0%; 2) one or more of Pb: up to 0.4%, Bi: up to 0.3%, Te: up to 0.3%, Se: up to 0.4% and Ca: up to 0.3%; 3) one or both of B and Mg: 0.001-0.02%; 4) one or both of Cu and Ni: 0.1-4.0%; 5) one or more of Nb, Ta, Ti, V, W and Al: 0.01-0.50%; and 6) O: 0.01-0.04%.

Abstract: Martensitic stainless steels that enable the fabrication of high-strength seamless steel pipe suited for use in oil-well pipe and pipeline tubing by means of a Mannesmann plug mill or Mannesmann mandrel mill process, without the formation of defects during production. The heat workability of these steels, which contain no more than 0.30% by weight of carbon and from 11 to 14% by weight of chromium, and have a ferrite content of at least 40% at 1200.degree. C., has been vastly improved by holding the phosphorus and sulfur levels therein to no more than 0.020% and 0.003% by weight, respectively.

Abstract: The present invention is directed to steel products which exhibit excellent machinability and are suitable for steel stocks of structural steel parts for a variety of machinery, such as transportation machinery including automobiles, machinery for industrial use, construction machinery, and the like; as well as to a variety of machined structual steel parts for machinery such as crankshafts, connecting rods, gears, and the like. The steel products of the present invention are endowed with excellent machinability and have the following composition based on % by weight: C: 0.05% to 0.6%; S: 0.002% to 0.2%; Ti: 0.04% to 1.0%; N: 0.008% or less; Nd: 0% to 0.1%; Se: 0% to 0.5%; Te: 0% to 0.05%; Ca: 0% to 0.01%; Pb: 0% to 0.5%; and Bi: 0% to 0.4%; wherein the maximum diameter of titanium carbosulfide contained in the steel is not greater than 10 .mu.m, and its amount expressed in the index of cleanliness of the steel is equal to or more than 0.05%.

Abstract: A high-Cr and high-Ni alloy of the invention comprises the following chemical composition and has excellent corrosion resistance to hydrogen sulfide in an environment where a partial pressure of hydrogen sulfide is about 1 atm., or below and the temperature is about 150.degree. C. The alloy is free of any expensive Mo and W and is thus inexpensive, with the attendant feature that mass production is possible: Si: 0.05-1.0%, Mn: 0.1-1.5%, Cr: 20-30%, Ni: 20-40%, sol. Al: 0.01-0.3%, Cu: 0.5-5.0%, REM: 0-0.10%, Y: 0-0.20%, Mg: 0-0.10%, Ca: 0-0.10%, and balance: Fe and incidental impurities, provided that C, P and S in the incidental impurity are, respectively, 0.05% or below, 0.03% or below and 0.01% or below. As set out above, each of REM, Y, Mg and Ca do not have to be added at all. If these elements are used, one or more of REM, Y, Mg and Ca are added. Preferable ranges of the contents of these elements when added are such that REM: 0.001-0.10%, Y: 0.001-0.20%, Mg: 0.001-0.10%, and Ca: 0.001-0.10%.

Abstract: Ferritic stainless steel which can be used for the production of steel wool, whose composition by weight is the following:carbon.ltoreq.0.2%,silicon.ltoreq.2%,manganese.ltoreq.2%,11%.ltoreq.chromium.ltoreq.30%,nickel.ltoreq.1%,sulfur.ltoreq.0.030,calcium.gtoreq..times.10.sup.-4 %,oxygen.gtoreq.40 .times.10.sup.-4 %,the calcium and oxygen contents satisfying the following relationship:0.2.ltoreq.Ca/O.ltoreq.0.7.

Abstract: A martensitic heat resistant steel is provided which has improved high temperature creep strength, contains Co and, at a temperature of 600.degree. C. or above, does not form an intermetallic compound substantially having a composition of Cr.sub.40 Mo.sub.20 Co.sub.20 W.sub.10 C.sub.2 --Fe. In a heat-resistant steel, containing not less than 8% of Cr, with Co, Mo, and W being simultaneously added thereto, a combination of the addition of a very small of Mg, Ba, Ca, Y, Ce, La and the like, with the addition of a minor amount of Ti and Zr, inhibits the precipitation of an intermetallic compound substantially having a composition of Cr.sub.40 Mo.sub.20 Co.sub.20 W.sub.10 C.sub.2 --Fe, thereby ensuring high temperature creep strength.

Abstract: A chromium steel sheet having excellent press formability, particularly deep-drawing formability and resistance to secondary work brittleness. The construction is a chromium steel sheet including C: not more than 0.03 wt %, Si: not more than 1.0 wt %, Mn: not more than 1.0 wt %, P: not more than 0.05 wt %, S: not more than 0.015 wt %, Al: not more than 0.10 wt %, N: not more than 0.02 wt %, Cr: 5-60 wt %, Ti: 4(C+N)-0.5 wt %, Nb: 0.003-0.020 wt %, B: 0.0002-0.005 wt %, and, if necessary, one or more selected from Mo: 0.01-5.0 wt %, Ca: 0.0005-0.01 wt % and Se: 0.0005-0.025 wt %, and the balance being Fe and inevitable impurities.

Abstract: The present invention relates to a resulfurized austenitic stainless steel with improved machinability, and which is especially useful in the field of machining at high cutting speed and in the field of bar turning.

Abstract: Austenitic stainless steel for the production of wire, which can be used in the field of drawing to a diameter of less than 0.3 mm and in the field of producing parts subjected to wear.

Abstract: The invention relates to a steel plate which exhibits a good resistance to a corrosive atmosphere, containing weakly acidic condensed water comprising SO.sub.2, Cl.sup.- ion, and CO.sub.2 such as the exhaust gas from a boiler which burns LNG.The steel plate having a good corrosion resistance to condensed water characterized in comprising a low C content, a low Mn content and a medium amount of Cr content, and further 0.01% or less of S in an unavoidable impurity, or further comprising at least one element of Si, Al, Cu, Ni, Mo, Nb, V, Ti, Ca, and B. More, the steel plate having a good corrosion resistance to condensed water comprising carbonic acid gas and chloride ion characterized in comprising a low C content, a low Mn content, P, Cu and Ni, and further 0.01% or less of S in an unavoidable impurity, or further comprising at least one element of Si, Al, Mo, Nb, V, Ti, Ca and B.

Abstract: Ferritic stainless steel with improved machinability, which can be used especially in the field of screw machining, characterized by the following composition:C<0.17%Si<2.0%Mn<2.0%Cr[11-20] %Ni<1.0%S.ltoreq.0.55%Ca>30.times.10.sup.-4 %O>70.times.10.sup.-4 %the Ca/O ratio, between the calcium content and the oxygen content, being given by 0.2<Ca/O<0.6, the said steel being subjected, after rolling and cooling, to an annealing heat treatment giving it a ferritic structure.

Abstract: Exhaust equipment members are made of a heat-resistant, austenitic cast steel having a composition consisting essentially, by weight, of 0.1-0.6% of C, less than 1.5% of Si, 1% or less of Mn, 8-20% of Ni, 15-30% of Cr, 0.2-1% of Nb, 2-6% of W, 0.001-0.01% of B, 0.02-0.3% of S and/or 0.001-0.1% of REM (Ce, La, Nb or Pt), Mg or Ca, the balance being Fe and inevitable impurities.

Abstract: The subject of the invention is a martensitic stainless steel with improved machinability, characterized in that its weight composition is the following:carbon lower than 1.2%silicon lower than or equal to 2%manganese lower than or equal to 2%chromium: 10.5.ltoreq.Cr.ltoreq.19%sulphur lower than or equal to 0.55%calcium higher than 32.times.10.sup.-4 %oxygen higher than 70.times.10.sup.-4 %the ratio of the calcium and oxygen content Ca/O being 0.2.ltoreq.Ca/O.ltoreq.0.6, the said steel being subjected to at least one quenching heat treatment to give it a martensitic structure.

Abstract: A ferritic stainless steel exhibiting excellent atmospheric corrosion resistance and crevice corrosion resistance can be provided by positively adding P thereto and by adequately adjusting Ca and Al. The ferritic stainless steel according to the present invention essentially consists of, in weight percentages,C: about 0.05% or lessSi: about 1.0% or lessCr: about 11% or more and less than about 20%Mn: about 1.0% or lessN: about 0.10% or lessS: about 0.03% or lessCa: about 5 ppm or more and about 50 ppm or lessAl: about 0.5% or lessP: more than about 0.04% and about 0.20% or lessand the balance being iron and incidental impurities. The stainless steel according to the present invention may also contain at least one element selected from a group (1) consisting of about 6% or less of Mo, group (2) consisting of about 1.0% or less of Cu, about 3% or less of Ni and about 3% or less of Co, or group (3) consisting of about 1.0% or less of Ti, about 1.0% or less of Nb, about 1.0% or less of V, about 1.