Low-Cr ferritic steels and low-Cr ferritic cast steels having ex

Details Low-Cr ferritic steels and low-Cr ferritic cast steels having ex Low-Cr ferritic steels and low-Cr ferritic cast steels having ex

1997-02-21

1998-09-29

Yee, Deborah

Alloys or metallic compositions

Ferrous

Chromium containing, but less than 9 percent

420109, C22C 3844, C22C 3848

Patent

active

058142746

ABSTRACT:
This invention provides low-Cr ferritic steels and low-Cr ferritic cast steels having excellent high-temperature strength and weldability. These low-Cr ferritic steels and low-Cr ferritic cast steels consist essentially of, on a weight percentage basis, 0.03 to 0.12% C, 0.05 to 0.7% Si, 0.05 to 1% Mn, 0.002 to 0.025% P, 0.001 to 0.015% S, 0.3 to 3% Cr, 0.01 to 1% Ni, 0.05 to 3% Mo, 0.01 to 0.5% V, 0.1 to 3% W, 0.01 to 0.2% Nb, 0.02 to 1.5% Re, 0.003 to 0.05% Al, 0.0001 to 0.01% B, 0.003 to 0.03% N, and the balance being Fe and incidental impurities, and have excellent high-temperature strength and weldability.

REFERENCES:
patent: 5407635 (1995-04-01), Iseda et al.

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