Corrosion-resistant matrix-strengthened alloy
AssigneeThe International Nickel Company, Inc.
InventorJames Roy Crum
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Abstract
Iron-based alloy composition containing special proportions of nickel, chromium, aluminum, copper and carbon provides good corrosion-resistance characteristics for service in caustic media, e.g., sodium hydroxide, chloride media, e.g., magnesium chloride, caustic-chloride media, e.g., sodium hydroxide-sodium chloride mixtures, and also when exposed to some acid media, e.g., nitric acid. Special utility particularly includes resistance to stress-corrosion-cracking in hot caustic and chloride media. Alloy has good workability for production of wrought products such as plate, bar and sheet and is also suitable for making corrosion-resistant castings and welded structures, e.g., chemical plant equipment.
Claims11
An alloy consisting essentially of 18% to 30% nickel and 20% to 30% chromium with the nickel-to-chromium ratio of up to 1.0, 1.7% to about 3% aluminum, 1% to about 5% copper, 0.03% to 0.08% carbon, up to 0.6% silicon, up to about 1.5% manganese, up to 0.06% calcium and balance essentially iron in an amount at least 44% of the alloy.
Dependencies are inferred from the claim text.