Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1974-05-17
1976-03-30
Rutledge, L. Dewayne
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75134F, C22C 3000
Patent
active
039472663
ABSTRACT:
An air-meltable, castable, workable alloy resistant to corrosion in sulfuric acid over a wide range of acid strengths. The alloy consists essentially of between about 28.59 and about 36.72% by weight nickel, between about 26.33 and about 30.15% by weight chromium, between about 3 and about 4.1% by weight molybdenum, between about 3 and about 4.5% by weight copper, between about 3 and about 4% by weight manganese, up to about 0.5% by weight cobalt, up to about 0.60% by weight silicon, up to about 0.07% by weight carbon, up to about 1% by weight tantalum, up to about 1% by weight titanium, up to about 2.38% by weight niobium, up to about 0.010% by weight boron, up to about 0.6% by weight of a rare earth component selected from the group consisting of cerium, lanthanum and misch metal, up to about 0.15% by weight nitrogen, and the balance essentially iron. The sum of the chromium content and 0.56 times the niobium content is between about 27 and about 31% by weight. The nickel content exceeds the chromium content by at least about 1.5% and also exceeds the sum of the chromium content and 0.56 times the niobium content by at least about 1.4%. Where the carbon content exceeds 0.04% by weight, it must be less than the sum of five times the titanium content and 10 times the niobium plus tantalum content.
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Carondelet Foundry Company
Rutledge L. Dewayne
Weise E. L.
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