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

C - Chemistry, Metallurgy

21

D

75/119, 148/34

C21D 1/19 (2006.01) C22C 38/10 (2006.01)

Patent

CA 1169682

ABSTRACT OF THE DISCLOSURE A high tensile steel which has a satisfactory yield strength of 60 kg/mm2 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 Ac1 point of the steel.

354715

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