Abstract: Air meltable, weldable cast alloys of high hot strength and hot gas corrosion resistance especially in the service temperature range of about 1800.degree. F. to 2100.degree. F. which consist essentially of:______________________________________ Nickel 41-54% by weight Chromium 24-29% Iron 8-18% Cobalt 3-8% Tungsten 4.5-6.5% Molybdenum 4-6.5% Niobium 0.8-2% Manganese 0.1-1.5% Silicon 0.1-1.5% Carbon 0.2-0.4% ______________________________________provided, that the nickel plus cobalt content is at least about 45%.

Abstract: Moderate cost air meltable, highly weldable nickel-chromium-iron alloys of high hot strength and excellent hot gas corrosion resistance especially in the service temperature range of 1600.degree. F. to 2200.degree. F. Which may be formulated to provide for good weldability before and after high temperature aging consisting essentially of:______________________________________ Nickel 33-40% by weight Chromium 24-30% Iron 14-32% Tungsten 8-17% Carbon Up to 0.12% Manganese Up to 1% Silicon Up to 1.

Abstract: The present invention is directed to air-meltable, tough alloys that are especially resistant to the abrasion and corrosion of wet-process phosphoric acid reactor fluids or slurries, especially those having a high fluoride ion concentration. The instant alloys consist of, by weight, about 22% to about 35% nickel, about 29% to about 35% chromium, about 2% to about 6% molybdenum, about 1% to about 4% copper, about 0.4% to about 1.2% carbon up to about 1.5% each of manganese and silicon and the balance essentially iron plus the usual minor impurities.

Abstract: A nickel-chromium-iron base alloy having improved corrosion and abrasion resistance which consists essentially of the following, by weight: nickel--28% to 45%, chromium--20% to 30%, molybdenum--1.5% to 6.2%, columbium--2.3% to 12%, carbon--0.3% to 1.5%, copper 0.8% to 4%, titanium--up to 1%, manganese--up to 1.5%, silicon--up to 1.5%, tantalum--up to 2%, tungsten--up to 2%, cobalt--up to 1%, nitrogen--up to 0.11%, iron--essentially balance.

Abstract: Air-meltable, air-castable, weldable, heat resistant alloys that exhibit high creep rupture strengths and high ductilities. An H-type base alloy or a high silicon base alloy contains additions of about 0.6% to 2.5% copper and 0.55% to 2.65% microalloying amounts of the group 0.2% to 0.85% tungsten, 0.2% to 0.85% molybdenum, 0.1% to 0.5% columbium and 0.05% to 0.45% titanium.

Abstract: Air-meltable, castable, machinable, hardenable alloys that are resistant to highly corrosive and abrasive slurries, especially those employed in the handling of wet-process phosphoric acid reactor fluids or hot concentrated sulfuric acid. The alloys consist of, by weight, about 11% to about 40% nickel (plus cobalt), about 27% to about 42% chromium, about 1% to about 4% copper, about 3% to about 4.5% silicon, about 0.7% to about 2% carbon, about 0.3% to about 3% manganese, up to about 4.5% molybdenum, and the balance essentially iron plus the usual minor impurities.

Abstract: Alloys are provided which consist essentially by weight percentages of from about 30% to about 35% Ni, from about 22% to about 25% Cr, from about 4% to about 6.5% Mo, from about 0.2% to about 1.5% W, from about 0.2% to about 0.6% Nb, from about 0.1% to about 0.6% Ti, from about 0.35% to about 1.75% Co, from about 0.05% to about 0.3% C, from about 0.2% to about 1.3% Si, from about 0.2% to about 1.5% Mn, and the balance essentially iron and the usual impurities.

Abstract: Fully austenitic alloys are provided whose essential components are as follow:______________________________________ NICKEL 17.3-22.5% BY WEIGHT CHROMIUM 9-14% MOLYBDENUM 1.2-2.8% COPPER 2.6-3.8% MANGANESE 2.6-4.2% COLUMBIUM 0.2-0.85% IRON ESSENTIALLY BALANCE ______________________________________Nominally these alloys of the invention will also contain carbon, up to a maximum of about 0.08% by weight, and up to about 1.5% silicon in its usual role in ordinary steel-making practice as a deoxidizer or as a portion of scraps and returns. The usual minor impurities may also be present.

Abstract: Air-meltable, castable, machinable, tough, silicon containing, chromium-nickel-iron alloys that are resistant to hot concentrated sulfuric acid and to abrasive or erosive action of grit or vapor bubbles in the acid. The alloys consist of, by weight, about 15% to about 25% nickel, from about 15% to about 26% chromium, from about 4.5% to about 8% silicon, from about 1% to about 4% copper, from about 0.3% to about 3% molybdenum, from about 0.5% to about 1.7% carbon, up to about 1.5% manganese, and the balance substantially iron plus the usual impurities and incidental tramp elements.

Abstract: Air-meltable, castable, machinable, hardenable alloys that are very resistance to highly corrosive and abrasive slurries or fluids consisting essentially of, by weight, about 25% to about 37% chromium, about 12% to about 35% nickel, about 2% to about 7% molybdenum; about 1.3% to about 2% carbon, up to about 3% silicon, up to about 3% copper, up to about 4% manganese, up to about 1.5% tungsten, up to about 1% niobium, (columbium) and balance essentially iron plus the usual minor impurities.

Abstract: A superalloy having improved hot strength at temperatures above about 1600.degree. F. The superalloy contains about 18-29% Ni by weight, 14-24% Co, 22-28% Cr, 0.25-0.8% W, 0.25-0.7% Cb, 0.12-0.55% C, and 0.05-0.35% Ti. Molybdenum content is maintained low but is tolerated up to about 0.8%.

Abstract: Alloys are provided which consist essentially by weight percentages of from about 10.5% to about 28% Ni, from about 14.8% to about 23% Cr, from about 3% to about 6.6% Si, up to about 4% Al, from about 3% to about 6.6% total content of Si plus Al, from about 0.2% to about 4% Mn, from about 0.15% to about 1.6% Mo, from about 0.25% to about 1.25% W, from about 0.10% to about 0.75% Cb, from about 0.12% to about 1.2% C, from about 0.05% to about 0.45% Ti, and the balance essentially iron and the usual impurities. The alloys may optionally contain up to about 0.1% Ca, up to about 0.25% Zr, up to about 0.15% B, up to about 0.3% N and up to about 0.15% of rare earth components.

Abstract: Alloys are provided which consist essentially of:______________________________________ CHROMIUM 11-20% By Weight NICKEL 3-10.5% MOLYBDENUM 1-4% CARBON 2-4.5% NITROGEN Up to about 0.25% SILICON 2.7-4% COPPER Up to about 4% COBALT Up to about 4% MANGANESE Up to about 4% ALUMINUM Up to about 0.2% Maximum COPPER + COBALT Up to 4% Total COPPER + COBALT + MANGANESE Up to 8% Total IRON & IMPURITIES Essentially Balance provided that NICKEL + 6-12.

Abstract: Air-meltable, castable, machinable, weldable heat-resistant alloys that are very resistant to hot gas corrosion and that exhibit high creep rupture strengths. The alloys are, by weight, about 7.5 to aboout 18% nickel, about 23.5 to about 35% chromium, about 0.85 to about 1.4% carbon, about 0.2 to about 1.8% molybdenum, about 0.2 to about 1.6% tungsten, about 0.1 to about 1.6% columbium (niobium), about 0.2 to about 4% manganese, about 0.2 to about 2.5% silicon, up to about 1.5% cobalt, up to about 0.6% titanium, up to about 0.4% zirconium, up to about 0.4% rare earth elements, up to about 0.1% boron, up to about 0.7% nitrogen, and the balance essentially iron plus the usual minor impurities.

Abstract: This invention relates to heat and corrosion resistant alloys for structural parts in industrial furnaces and similar installations requiring hot strength, long life and resistance to hot gas corrosion, carburization and thermal fatigue, and to master alloys to aid in the production of these alloys. The alloys consist of additions of less than one percent by weight each of the components tungsten, zirconium, molybdenum, columbium, titanium and one or more rare earth elements to base alloys of the types standardized by the Alloy Castings Institute Division of the Steel Founders Society of America or to similar base alloys. The master alloys consist of all of these components, with the possible exception of Mo, combined together in the desired proportions, possibly along with some combination of iron, nickel or chromium in total content of up to about half of the master alloys by weight as partial diluents. The resultant master alloys are always denser than molten baths of the base heat resistant alloys.

Abstract: Single-phase, austenitic, stainless alloys which comprise, by weight, from about 13% to about 20% Ni, from about 13% to about 15% Cr, from about 7% to about 9% Mo, from about 0.5% to about 3.5% Cu, from about 0.06% to about 0.25% N, from about 0.2%, preferably from about 1%, up to about 4.5% Mn, up to about 0.08% C, up to about 2% Si, up to a total amount of about 1% of the common carbide-stabilizing elements columbium, tantalum and titanium, and the balance essentially iron, plus the usual impurities encountered in ordinary commercial steelmaking practice and found in common ferroalloys, scraps and melting materials.

Abstract: Austenitic stainless steel casting alloys which have excellent resistance to seawater, other chloride solutions, and a broad spectrum of other chemical substances, but which do not require solution heat treatments, after welding or other exposure to heat, such as in the slow cooling of large, rangy castings from the molten state. The alloys also posses very high tensile elongation values, excellent weldability and resistance to thermal and mechanical shock. The alloys are comprised, by weight, of from about 28% to about 34% Ni, from about 22% to about 26% Cr, from about 3.3% to about 4.4% Mo, from about 2% to about 3% W, from about 1% to about 3% Cu, from about 0.2% to about 0.9% Si, from about 0.3% to about 1.3% Mn, up to about 0.05%, but preferably not more than about 0.03% C, and the balance essentially iron, plus the usual impurities encountered in conventional production practice. The alloys may optionally contain up to about 0.3% Nb, up to about 0.20% Ti, and up to about 0.25% each of Al and V.

Abstract: Low-nickel, low-molybdenum, air-meltable air-castable, fabricable, weldable, duplex stainless steel alloys of an austenitic-ferritic matrix that are essentially free of martensite and sigma phase. The alloys are not only substitutable for the various austenitic 18% chromium - 8% nickel grades of stainless steels but possess superior corrosion resistance properties to those prior art steels. The alloys consist essentially of between about 2% and about 5% of weight nickel, between about 23% and 28% by weight chromium, between about 0.50% and about 1% by weight molybdenum, between about 0.50% and about 4% by weight copper, between about 0.10% and about 0.60% by weight tungsten, between about 0.08% and about 0.32% by weight nitrogen, up to about 2% by weight manganese, up to about 1% by weight silicon, up to about 0.08% by weight carbon, and the balance essentially iron. The alloys may optionally contain up to about 0.45% by weight vanadium, up to about 0.65% by weight columbium, up to about 0.

Abstract: The present invention is directed to air-meltable, castable, workable alloys resistant to hot or cold chlorides and variety of chemical streams. The alloys consist essentially of, by weight, between about 20% and about 24% nickel, from about 22% to about 25% chromium, from about 5% to about 7% molybdenum, from about 0.7% to about 3.5% copper, up to about 0.08% carbon, up to about 0.35% nitrogen, up to about 0.8% columbian (niobium), up to about 1.5% manganese, up to about 1% silicon, and the balance essentially iron. Up to about 0.3% cobalt can also be present as an element naturally coexisting in certain ore deposits as a sister element to nickel and considered here to be part of the nickel content. The alloys of the present invention are of single phase austenitic matrices.

Abstract: Heat and corrosion resistant alloys suitable for use in the manufacture of structral parts for industrial furnaces and like installations where such parts must possess high resistance to oxidation in addition to exceptional levels of hot strength, and which can be air melted and cast or forged. The alloys consist essentially of between about 35% and about 46% by weight nickel, between about 25% and about 29% by weight chromium, between about 10% and about 13% by weight cobalt, between about 5.5% and about 8% by weight tungsten, between about 0.2% and about 1.5% by weight columbium (niobium), between about 0.2% and about 1.5% by weight zirconium, from about 0.05% to about 0.5% by weight titanium, between about 0.3% and about 0.9% by weight carbon, up to about 1.5% by weight manganese, up to about 2% by weight silicon, up to about 0.3% nitrogen and the balance essentially iron.