Abstract: A Ni steel has a chemical composition within a predetermined range, in which a metallographic structure of a thickness middle portion contains 2.0 vol % to 20.0 vol % of an austenite phase, an average grain size of prior austenite grains is 3.0 ?m to 12.0 ?m, an average aspect ratio of the prior austenite grains is 2.6 to 10.0, a plate thickness is 4.5 mm to 20 mm, a yield stress at room temperature is 590 MPa to 710 MPa, and a tensile strength at the room temperature is 690 MPa to 810 MPa, when the plate thickness is more than 16 mm, the Ni steel contains Ni: 11.5% or more, and when the plate thickness is 16 mm or less and the Ni steel contains Ni: less than 11.5%, the average grain size of the prior austenite grains is 6.0 ?m or less.

Abstract: A nickel-containing steel for low temperature according to an aspect of the present invention has a chemical composition within a predetermined range, in which a metallographic structure of a thickness middle portion contains 2.0 vol % to 20.0 vol % of an austenite phase, an average grain size of prior austenite grains is 3.0 ?m to 15.0 ?m, an average aspect ratio of the prior austenite grains is 1.0 to 2.4, a plate thickness is 4.5 mm to 30 mm, the chemical composition and the average grain size of the prior austenite grains are further limited depending on the plate thickness, a yield stress at room temperature is 460 MPa to 710 MPa, and a tensile strength at the room temperature is 560 MPa to 810 MPa.

Abstract: There is provided a metal powder for use in a selective laser sintering method for producing a three-dimensional shaped object, wherein the metal powder comprises a powder mixture of a precipitation-hardening metal composition. In particular, the metal powder of the present invention is configured to have a Fe-based component powder and a Ni-based component powder which are individually included in the powder mixture wherein a powder made of an alloy of Fe-based and Ni-based components is not included as a main powder in the powder mixture.

Abstract: A powder for a sintered valve sheet made of an iron-based alloy is provided, which has excellent compactibility and abrasion resistance and from which a carbide that may abrade a counterpart is not precipitated. A powder is provided, wherein a molten steel, in which carbon is controlled to be less than 0.1% by mass to avoid precipitation of a carbide, 0.5 to 8.5% by mass of Si, 10 to 25% by mass of Ni, 5 to 20% by mass of Mo, and 5 to 20% by mass of Co are contained, and a remainder includes Fe and incidental impurities, is rapidly cooled by a conventional technique such as a gas atomization method, a water atomization method, or a centrifugal force atomization method, so that a supersaturated solid solution of the alloy elements consisting mainly of austenite, which is effective in softening the powder, is formed. Since the powder has low hardness, the compactibility is excellent at the time of compression molding.

Abstract: An austenitic TRIP steel consisting essentially of, in weight %, 0.14 to 0.18% Al, 2.8 to 3.2% Ti, 23.5 to 23.8% Ni, 3.8 to 4.2% Cr, 1.1 to 1.3% Mo, 0.29 to 0.31% V, 0.01 to 0.015% B, 0.01 to 0.02% C, and balance Fe and incidental impurities exhibits combined high yield strength and high strain hardening leading to improved stretch ductility under both tension and shear dynamic loading conditions.

Abstract: A nodular graphite, heat-resistant cast iron composition for use in engine systems. The composition contains carbon 1.5-2.4 weight %, silicon 5.4-7.0 weight %, manganese 0.5-1.5 weight %, nickel 22.0-28.0 weight %, chromium 1.5-3.0 weight %, molybdenum 0.1-1.0 weight %, magnesium 0.03-0.1 weight %, and a balance weight % being substantially iron. The composition has an austenitic matrix. Additionally, the composition exhibits excellent oxidation resistance at high temperature and excellent mechanical properties at both room and high temperatures. Thus, the composition can be a lower cost substitute material for Ni-Resist D5S under thermocycling conditions experienced by exhaust gas accessories and housings such as engine exhaust manifolds, turbocharger housings, and catalytic converter housings.

Abstract: A high-carbon austenitic iron-base alloy with good corrosion and wear resistance, particularly useful for valve seat insert applications when corrosion resistance is required, comprises about 1.8-3.5 wt % carbon, about 12-24 wt % chromium, about 0.5-4 wt % silicon, about 12-25 wt % nickel, about 2-12 wt % molybdenum and tungsten combined, about 0.05-4 wt % niobium and vanadium combined, about 0-1 wt % titanium, about 0.01-0.2 wt % aluminum, about 0.05-3 wt % copper, and less than 1.5 wt % manganese, with the balance being iron and a small amount of impurities.

Abstract: An austenitic TRIP steel consisting essentially of, in weight %, 0.14 to 0.18% Al, 2.8 to 3.2% Ti, 23.5 to 23.8% Ni, 3.8 to 4.2% Cr, 1.1 to 1.3% Mo, 0.29 to 0.31% V, 0.01 to 0.015% B, 0.01 to 0.02% C, and balance Fe and incidental impurities exhibits combined high yield strength and high strain hardening leading to improved stretch ductility under both tension and shear dynamic loading conditions.

Abstract: A ferrous abrasion resistant sliding material capable of improving seizing resistance, abrasion resistance and heat crack resistance is provided. The ferrous abrasion resistant sliding material has a martensite parent phase which forms a solid solution with carbon of 0.15 to 0.5 wt %, and the martensite parent phase contains one or more types of each special carbide of Cr, Mo, W and V dispersed therein in a total content of 10 to 50% by volume.

Abstract: A sinter-hardening raw powder can yield a press-and-sinter compact with high hardness. The raw powder for sintering includes Fe as its primary component and also includes 0.3-0.8 wt % C, 5.0-12.0 wt % Ni, 1.0-5.0 wt % Cr, and 0.1-2.0 wt % Mo, wherein the mean particle size of the raw powder for sintering is between 50 and 100 ?m. The sintered and tempered compact, without any quenching treatment, has high hardness.

Abstract: Medical devices, such as endoprostheses, and methods of making the devices are disclosed. The endoprostheses comprise a tubular member capable of maintaining patency of a bodily vessel. The tubular member includes a mixture of at least two compositions, where the presence of the second composition gives the mixture a greater hardness than that of the first composition alone. The first composition includes less than about 25 weight percent chromium, less than about 7 weight percent molybdenum, from about 10 to about 35 weight percent nickel, and iron. The second composition is different from the first and is present from about 0.1 weight percent to about 5 weight percent of the mixture.

Abstract: The invention relates to a soft magnetic alloy with the following composition in wt. %: 28%?Ni?34%, 0%?Co?4%, 0%?Cu?4%, 1%?Cr, 0%?Mo?8%, 0%?Nb?1%, 0%?Mn?2%, 0%?V?5%, 0%?W?5%, 0%?Si?4%, 0%?Al?4%, 0%?C?0.4%, optionally one or several elements selected from magnesium and calcium the content of which is such as to remain below 0.1%, the rest being iron and impurities from production. The chemical composition furthermore satisfies the following relationships: 180.5?6×Ni2.5×(Cr+Mo+V+W+Si+Al)+4×(Co+Cu)?197.5 et Co+Cu?4%. The invention relates to the use thereof for production of a stator for use in a motor for clock-making.

Abstract: A soft magnetic film is formed which is represented by the formula (FexNiy)aMob, in which 0.65?x?0.75 and x+y=1 are satisfied when x and y are on a mass percent ratio basis, and 0<b?5 and a+b=100 are satisfied when a and b are on a mass percent basis, and by using this soft magnetic film, a lower core layer and/or an upper core layer is formed. Accordingly, a saturated magnetic flux density of 1.6 T or more and a resistivity of 40 ??·cm or more can be obtained, and hence a thin film magnetic head having a small loss in a high frequency signal region can be provided.

Abstract: A unique austenitic iron base alloy for wear and corrosion resistant applications, characterized by its excellent sulfuric acid corrosion resistance and good sliding wear resistance, is useful for valve seat insert applications when corrosion resistance is required. The alloy comprises 0.7-2.4 wt % carbon, 1.5-4 wt % silicon, 3-9 wt % chromium, less than 6 wt % manganese, 5-20 wt % molybdenum and tungsten combined, with the tungsten comprising not more than ? of the total, 0-4 wt % niobium and vanadium combined, 0-1.5 wt % titanium, 0.01-0.5 wt % aluminum, 12-25 wt % nickel, 0-3 wt % copper, and at least 45 wt % iron.

Abstract: An iron cast having iron as a major component, and including C, Si, Mn, Cr, Mo and Ni, where the cast iron provides excellent heat resistance and oxidation resistance at high temperatures. The cast iron beneficially contains between 2.5 to 3.0% of C; 2.0 to 3.0% of Si; 0.8 to 1.2% of Mn; 1.7 to 3.0% of Cr; 0.025 to 0.06% of Mg; 0.15 to 0.4% of Mo; and 17.0 to 20.0% of Ni; but less than 0.1% of P; and less than 0.02% of S. The cast iron is suitable for extremely severe conditions at high temperatures, and can be used for an exhaust manifold for engines where temperature of the manifold may reach 850° C.

Abstract: A weight member for a golf club head is made of a WFeNi alloy by a precision casting process. The WFeNi alloy includes wt 15%-40% of iron, wt 30%-60% of nickel, wt 15%-30% of tungsten, wt 1.5%-10.0% of chromium, and wt 0.5%-5.0% of molybdenum. Chromium improves the rust-resisting property of the weight member. Molybdenum reduces the risk of cracks in the weight member during welding. Uniformity of shining finishing of the weight member can be improved by controlling a mixture ratio of nickel to tungsten. Manganese, copper, vanadium, and niobium may be added to improve the mechanical properties of the weight member.

Abstract: The present invention provides a maraging steel excellent in fatigue characteristics and a process for the production thereof. A maraging steel of the first embodiment of the present invention has a chemical composition consisting essentially of, in % by weight: C: 0.01% or less, Ni: 8-19%, Co: 8-20%, Mo: 2-9%, Ti: 0.1-2%, Al: 0.15% or less, N: 0.003% or less, O: 0.0015% or less, and the balance Fe and the Ti component segregation ratio and the Mo component segregation ratio in its structure of 1.3 or less each. A maraging steel of the second embodiment of the present invention has the above composition and contains a nonmetallic inclusion in its structure having a size of 30 &mgr;m or less. The maraging steel of the second embodiment can be obtained easily by appropriate plastic working of a steel ingot with a taper Tp=(D1−D2)×100/H of 5.0-25.0%, a height-diameter ratio Rh=H/D of 1.0-3.0, and a flatness ratio B=W1/W2 of 1.5 or less.

Abstract: There is provided inexpensive maraging steel having high fatigue strength and maraging steel strip formed by use of the same. The maraging steel having high fatigue strength, consisting essentially, by mass, of not more than 0.008% C, from 0 inclusive but not more than 2.0% Si, from 0 inclusive but not more than 3.0% Mn, not more than 0.010% P, not more than 0.005% S, 12 to 22% Ni, 3.0 to 7.0% Mo, less than 7.0% Co, not more than 0.1% Ti, not more than 2.0% Al, less than 0.005% N, not more than 0.0033% O (oxygen), and the balance substantially Fe, a total amount of (3Si+1.8Mn+Co/3+Mo+2.6Ti+4Al) being in a range of 8.0 to 13.0%.

Abstract: Thermal conductivity of glassware forming blank molds and blow molds of Ni-Resist ductile iron is selectively controlled by formation of compacted graphite in the mold microstructure during preparation of the melt and casting of the mold bodies. Specifically, with a Type D5 Ni-Resist ductile iron according to ASTM-A439-84, compacted graphite is selectively formed in the cast microstructure of the mold body by reducing the magnesium and sulphur concentrations in the iron composition to the range of 0.01 to 0.04 wt % magnesium and 0.00 to 0.01 wt % sulphur, and adding titanium to the iron composition in the range of 0.10 to 0.25 wt % titanium. Whereas formation of compacted graphite in the cast microstructure is normally considered to be undesirable for glassware forming molds, it has been found that formation of a small but appreciable amount of graphite provides the opportunity selectively to tailor the thermal conductivity characteristics of the mold body.

Abstract: A weight member for a golf club head is made of a WFeNi alloy by a precision casting process. The WFeNi alloy includes nickel 30-60 wt %, tungsten 15-30 wt %, chromium 1.5-10.0 wt %, and iron that is the remaining portion. Chromium improves the rust resisting property of the weight member and lengthens the life of the weight member. Uniformity of shining finishing of the weight member can be improved by controlling a mixture ratio of nickel to tungsten. Silicon may be added to improve the flowability of the molten metal. Manganese, copper, vanadium, and niobium may be added to improve the mechanical properties of the weight member.

Abstract: The present invention is related to an air melted, substantially graphite and nitrogen-free alloy, aged or not aged by precipitation hardening, specially adapted for gas turbine or internal combustion engine exhaust system parts, comprising a graphite-free microstructure of the following composition: 1 Carbon max 0.4 wt. % Silicon 0.5 to 6 wt. % Manganese 0.1 to 4.5 wt. % Phosphorous 0.01 to 0.08 wt. % Nickel 13 to 38 wt. % Chromium 0 to 6 wt. % Sulphur max 0.12 wt. % Nitrogen max 0.02 wt.

Abstract: The invention relates to creep-resistant iron-nickel alloys with a low thermal expansion coefficient that contain (in weight %) 0.008 to 0.12 C, 0.05 to 0.30% Mn, 0.05 to 0.30% Si, 0.2 to 0.9% Mo, 0.1 to 0.3% Cr, 0.03 to 0.15% Nb, a maximum content of 0.5% Co as well as a content of 36.0 to 36.5% Ni, and a balance of iron and production-related impurities. The alloys have a thermal expansion coefficient of less than 2.0×10−6/K in the temperature range of 20 to 100° C.

Abstract: An oxidation-resistant coating is described, formed of an alloy containing: about 40 to about 50 atom % aluminum and about 0.5 atom % to about 3 atom % tantalum; with a balance of nickel; cobalt, iron, or combinations thereof. The coating may also include chromium and a precious metal, as well as other components, such as zirconium or molybdenum. A method for applying the oxidation-resistant coating to a substrate is also described. The substrate can be formed of superalloy material, e.g., a turbine engine component. Related articles are also disclosed.

Abstract: A maraging steel containing the following: Ni 14-23 wt. %, Mo 4-13 wt. %, Al 1-3.5 wt. %, C.ltoreq.0.01 wt. %, remainder Fe and impurities resulting from the processing. The composition also preferably satisfies the following conditions:Ni+Mo=23-27 wt. %, inclusively;Ni+2.5.times.Mo+2.3.times.Al.gtoreq.38 wt. %.

Abstract: A maraging steel preferably without cobalt, having the following chemical composition: Ni 18-23 wt. %, Mo 4.5-8 wt. %, Ti 1-2 wt. %, Al 0-0.3 wt. %, C.ltoreq.0.01 wt. %, remainder Fe and impurities. The composition also preferably satisfies the following conditions:Ni+Mo=23-27 wt. %, inclusively;Ni+3.times.Mo+20.times.Ti+10.times.Al.gtoreq.60 wt. %.

Abstract: Disclosed is an austenite stainless steel comprising: no more than 0.05% by weight of C; no more than 0.25% by weight of Si; no more than 0.40% by weight of Mn; no more than 0.040% by weight of P; no more than 0.003% by weight of S; 30.0 to 40.0% by weight of Ni; 20.0 to 26.0% by weight of Cr; 5.0 to 8.0% by weight of Mo; no more than 0.1% by weight of Al; 0.001 to 0.010% by weight of B; 0.15 to 0.30% by weight of N; and balance of Fe and inevitable impurity. The austenite stainless steel satisfying formula (1) and (2) mentioned below (wherein "Cr", "Mo", "N", "Si" and "Mn" mean content of each element).Cr+3.3Mo+20N.gtoreq.

Abstract: An iron-nickel alloy, the chemical composition of which includes by weight:30%.ltoreq.Ni+Co.ltoreq.85%;0%.ltoreq.Co+Cu+Mn.ltoreq.10%;0%.ltoreq.Mo+W+Cr.ltoreq.4%;0%.ltoreq.V+Si.ltoreq.2%;0%.ltoreq.Nb+Ta.ltoreq.1%;0.003%.ltoreq.C.ltoreq.0.05% 0.003%.ltoreq.Ti.ltoreq.0.15%;0.003%.ltoreq.Ti+Zr+Hf.ltoreq.0.15%;0.001%<S+Se+Te<0.015%;and the remainder, iron and impurities resulting from production; in addition, the chemical composition satisfies the relationship:0.ltoreq.Nb+Ta+Ti+Al.ltoreq.1%.A cold-rolled strip with a cubic texture and its uses.

Abstract: Stainless steel member for semiconductor fabrication equipment having a passive state coating on the surface of the stainless steel comprising, in weight percent, 0.1% or less of C, 2.0% or less of Si, 3.0% or less of Mn, 10% or more of Ni, 15 to 25% of Cr, 1.5 to 4.5% of Mo, 0.5% or less of one or more rare earth element and Fe for substantially the whole remainder. Said passive state coating has a pitting potential of at least 900 mV (when the current density of the anode polarization curve determined with a potentiostat in 3.5% aqueous sodium chloride solution is 10 .mu.A/cm.sup.2) and has a thickness of 0.5 to 20 nm. The invention also includes a surface treatment method for the stainless steel.

Abstract: A powder-metallurgy-produced, essentially titanium-free, nickel-containing maraging steel article such as for use in the manufacture of die casting die components and other hot work tooling components. The article preferably contains an intentional addition of niobium. The article may be produced as a hot-isostatically-compacted, solution annealed, fully dense mass of prealloyed particles, or alternately, as a hot-isostatically-compacted, plastically deformed and solution annealed, fully dense mass of prealloyed particles.

Abstract: A high strength, high fracture toughness steel alloy consisting essentially of, in weight percent, about______________________________________ C 0.2-0.33 Mn 0.20 max. Si 0.1 max. P 0.008 max. S 0.004 max. Cr 2-4 Ni 10.5-15 Mo 0.75-1.75 Co 8-17 Ce Effective amount-0.030 La Effective amount-0.01 Fe Balance ______________________________________and an article made therefrom are disclosed. A small but effective amount of calcium can be present in this alloy in substitution for some or all of the cerium and lanthanum. The alloy is an age-hardenable martensitic steel alloy which provides a unique combination of tensile strength and fracture toughness. The alloy provides excellent mechanical properties when hardened by vacuum heat treatment with inert gas cooling and has a low ductile-to-brittle transition temperature.

Abstract: This invention relates to corrosion resistant, austenitic, non-magnetic alloys. The alloys contain about 32 to 38% nickel, about 3 to 7% chromium, about 3 to 5% titanium, about 0.3 to 1.5% aluminum, about 0.5 to 1.5% molybdenum, an effective amount of vanadium, about 0.005 to 0.02% boron, up to about 0.02% carbon, and the balance substantially iron. The alloys are controlled temperature hot rolled and age annealed to provide strain hardening and precipitation strengthening to achieve yield strength objectives established for retaining rings in new high capacity generators. Yield strengths of at least about 200 ksi can be produced by the alloys of this invention making them suitable for use in new high capacity generators.

Abstract: A process and material is disclosed for use in the manufacture of a tensioned mask color cathode ray tube which includes a faceplate having on its inner surface a phosphor screen, and having on opposed sides of the screen a support structure for the mask. The process comprises providing an apertured foil shadow mask characterized by being composed of a nickel-iron alloy, and securing the foil mask to the support structure while under tension and in registration with the phosphor screen. The process is further characterized by the subjection of the foil mask to a thermal cycle to partially anneal the mask to a state in which the mask has favorable magnetic and mechanical properties. The partial anneal may be accomplished as a discrete step prior to installing the mask on the support structure, or accomplished during, or as a result of, a thermal cycle in the process of sealing the tube.

Abstract: The present invention is directed to maraging steels, and particularly to a maraging steel of the cobalt-free type possessing such a combination of strength and fracture toughness that it is suitable for use in respect of demanding applications requiring product forms of very substantial section size.

Abstract: A low cobalt maraging steel has a yield strength of at least about 240 ksi (about 1655 MPa) in the aged condition in combination with good toughness as indicated by a longitudinal Charpy V-notch impact toughness of at least aobut 20 ft-lb (about 27 J), as well as good notch ductility. The alloy contains, in weight percent, about:______________________________________ w/o ______________________________________ C 0.02 Max. Ni 15-20 Mo 0.50-4.0 Co 0.5-5.0 Ti 0.90-1.35 Nb 0.03-0.35 Al 0.3 Max. B Up to 0.015 ______________________________________The balance is essentially iron, optional additions, and the usual impurities found in commercial grades of high nickel, low carbon maraging steels. The alloy is further characterized in that the ratio %Co:%Mo is at least about 0.3 and %Ti+%Nb.gtoreq.1.0.

Abstract: The present invention relates to an iron-nickel alloy containing from about 30% to about 60% nickel, from about 0.001% to about 0.15% nitrogen, at least one element selected from the group consisting of from about 1% to about 10% molybdenum and from about 0.001% to about 2% aluminum and the balance essentially iron. The alloys demonstrate improved resistance to intermetallic compound formation, improved glass to metal sealing properties, and improved wirebonding performance. The alloys of the present invention have particular utility as a lead frame material for semiconductor packages.

Abstract: A high toughness, ultra high-strength steel having an excellent stress corrosion cracking resistance with a yield stress of not less than 110 kgf/mm.sup.2, which comprises 0.06-0.20 wt % of C, not more than 0.35 wt % of Si, 0.05-1.0 wt % of Mn, 8-11 wt % of Ni, 0.2-2.5 wt % of Cr, 0.7-2.5 wt % of Mo, 0.05-0.2 wt % of V, 0.01-0.08 wt % of Al, not more than 0.005 wt % of N, not more than 0.003 wt % of O, provided that the value of Al (%).times.N (%).times.10.sup.4 is not more than 1.5, and the balance being substantially Fe and inevitable impurities.

Abstract: The present invention relates to iron-nickel alloys having improved glass sealing properties. Alloys of the present invention contain from about 30% to about 60% nickel, from about 0.5% to about 3% silicon, from about 0.5% to about 3.5% aluminum and the balance essentially iron. Preferably, the alloys have a total aluminum plus silicon content of less than about 4%. The alloys of the present invention have particular utility in electronic and electrical applications. For example, they may be used as a lead frame or a similar component in a semiconductor package.

Abstract: A high strength powder metal part formed from an alloy of iron, nickel, molybdenum and carbon and having an ultimate tensile strength of at least 175,000 pounds per square inch. The powder metal part is made by mixing the alloy with a lubricant, forming the mixture into the desired part shape, sintering in a dissociated ammonia atmosphere, and cryogenically cooling the sintered part.