Patent Number: 8,025,746

Title: Turbine casing

Abstract: A casing is formed from an alloy which contains, by mass, 0.08-0.20% C, 0.05-0.45% Si, 0.10-0.30% Mn, 0.80-1.40% Ni, 1.00-1.40% Cr, 1.20-1.60% Mo, 0.10-0.30% V, 0.06-0.10% Ti, 0.0005-0.0010% B, not more than 0.01% P, not more than 0.01% S, and not more than 0.005% Al, the balance being Fe and unavoidable impurity elements. The casing has excellent high-temperature strength, high toughness and excellent weldability, and is applicable to casings used in high-temperature high-pressure steam environments.

Inventors: Kawanaka; Hirotsugu (Hitachi, JP), Arai; Masahiko (Hitachinaka, JP), Nakamura; Tateki (Hitachi, JP)

Assignee: Hitachi, Ltd.

International Classification: C22C 38/54 (20060101); C22C 38/50 (20060101); C22C 38/46 (20060101)

Expiration Date: 2019-09-27 0:00:00