General purpose maintenance-free constructional steel of superio

Details General purpose maintenance-free constructional steel of superio General purpose maintenance-free constructional steel of superio

1984-10-10

1986-08-26

Rutledge, L. Dewayne

Metal treatment

Compositions

Heat treating

75126C, 75128W, 75124, 75126D, 75128T, C22C 3822, C22C 3844

Patent

active

046080996

ABSTRACT:
This invention relates to an improved corrosion resistant steel which nominally contains: 0.015-0.031% C, 11-12% Cr, 0.2-0.5% Mo, 1.5% max Ni, 1.5% max Mn, 0.8% max Si, 0.05% max Ti, 0.03% max N, 0.03% max P, 0.03% max S with the balance Fe. The steel of the present invention has good toughness with a relatively low ductile to brittle transition temperature. In the rolled and tempered condition the steel has a mixed microstructure consisting of tempered martensite and ferrite.

REFERENCES:
patent: 2306421 (1942-12-01), Arness
patent: 3832244 (1974-08-01), Pinnow et al.
patent: 4326885 (1982-04-01), Larson et al.

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