Martensitic precipitation-hardenable stainless steel

Details Martensitic precipitation-hardenable stainless steel Martensitic precipitation-hardenable stainless steel

1990-01-04

1991-07-30

Yee, Deborah

Alloys or metallic compositions

Ferrous

Nine percent or more chromium containing

420 57, 420 58, 420 68, C22C 3844

Patent

active

050358553

ABSTRACT:
A martensitic precipitation-hardenable stainless steel essentially consisting of, in weight percent, not more than 0.08% C, 0.5-4.0% Si, not more than 4.0% Mn, 5.0-9.0% Ni, 10.0-17.0% Cr, more than 0.3% and up to 2.5% Mo, 0.15-1.0% Ti, not more than 1.0% Al and not more than 0.03% N and the balance being Fe, and inevitable incidental impurities, which may contain 0.3-2.5% Cu is disclosed. This steel has low hardness before aging and exhibits high strength and good toughness after aging.

REFERENCES:
patent: 3658513 (1972-04-01), Clarke, Jr.
patent: 3690896 (1972-09-01), Mikhailovich et al.

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