Crs Holdings, Inc.

Stephane A Forsik

Alberto O Polar-Rosas

Samuel J Kernion

Mario Epler

Tao Wang

Ning Zhou

Wesley T Roth

Andrea Ricci

A precipitation hardenable, cobalt-nickel base superalloy is disclosed. The is characterized by the following weight percent composition. The balance of the alloy is cobalt and usual impurities. The alloy provides a novel combination of strength and ductility after long-term exposure to elevated operating temperatures as found in gas turbines and jet engines. A fine-grain steel article made from the alloy is also disclosed. The steel article is also characterized by a continuous surface layer of AlOand CrOthat protects the alloy from oxidation at the elevated operating temperatures.

Precipitation hardenable cobalt-nickel base superalloy and article made therefrom

A precipitation hardenable, martensitic stainless steel is disclosed. The alloy has the following broad composition in weight percent. The balance of the alloy is iron and the usual impurities found in commercial grades of precipitation hardenable martensitic stainless steels as known to those skilled in the state of the art in melting practice for such steels. A method of making parts from the alloy and an article of manufacture made from the alloy are also described.

High fracture toughness, high strength, precipitation hardenable stainless steel

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Reading, PA, United States of America

Stephane A Forsik