High tensile steel and process for producing the same

Details High tensile steel and process for producing the same High tensile steel and process for producing the same

1982-06-09

1983-10-04

Skiff, Peter K.

Metal treatment

Compositions

Heat treating

75123K, 75126H, 148 124, 148 36, C21D 800

Patent

active

044076819

ABSTRACT:
A high tensile steel which has a satisfactory yield strength of 60 kg/mm.sup.2 or more and excellent resistances to sulfide corrosive cracking and corrosion, and which comprises, as indispensable components, 0.05 to 0.50 wt % of C, 0.1 to 1.0 wt % of Si, 0.1 to 2.0 wt % of Mn, 0.05 to 1.50 wt % of Co and the balance consisting of Fe, is produced by hot- or cold-rolling it, rapidly heating the rolled steel to austenitize it, quenching the austenitized steel and, finally, tempering the quenched steel at a temperature not higher than the Ac.sub.1 point of the steel.

REFERENCES:
patent: 2147122 (1939-02-01), Emmons
patent: 3068095 (1962-12-01), Anthony et al.
patent: 3615370 (1971-10-01), Ridal et al.
patent: 3711340 (1973-01-01), Korchynsky et al.
patent: 4137104 (1979-01-01), Nashiwa et al.
patent: 4226645 (1980-10-01), Waid et al.
Greer, "Factors Affecting the Sulfide Stress Cracking Performance of High Strength Steels", Materials Performance, Mar. 1975, pp. 11-22.

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