Carpenter Technology Corporation

Crs Holdings, Inc.

Sunil Widge

Edward A Wanner

Wilson P Rehrer

Dwight D Wegman

James W Martin

Terry A DeBold

Richard B Frank

An age hardenable nickel base chromium, molybdenum, alloy as well as intermediate products and articles made therefrom are disclosed which, in the solution treated and age hardened condition, have a 0.2% yield strength greater than 100 ksi combined with resistance to pitting and crevice corrosion and to stress corrosion cracking in chloride and sulfide environments at elevated temperatures up to about 500.degree. F. without requiring working below the recrystallization temperature of the alloy. Broad and preferred ranges are disclosed as follows:

Corrosion resistant age hardenable nickel-base alloy

A heat resisting, controlled thermal expansion, nickel-iron base alloy consisting essentially of, in weight percent, about:

Heat resisting controlled thermal expansion alloy balanced for having

This invention provides a process for improving, to at least a predetermined level, the stress rupture life and/or stress rupture ductility of precipitation hardenable nickel and nickel-iron base alloys containing nickel, niobium, and silicon when said alloys have less than a predetermined level of these stress rupture properties when worked and aged by a primary heat treatment. This improvement in properties is accomplished by controlled precipitation of a sufficient quantity of a (Ni, Nb, Si)-containing intermetallic phase.

Heat treatment of precipitation hardenable nickel and nickel-iron alloys

A heat, corrosion and wear resistant austenitic steel and article made therefrom is disclosed containing in weight percent about

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Dryville, PA, United States of America

Sunil Widge