High strength bolt and method of manufacturing same

Details High strength bolt and method of manufacturing same High strength bolt and method of manufacturing same

C - Chemistry, Metallurgy

22

C

85/111, 75/131,

C22C 38/24 (2006.01) C21D 1/25 (2006.01) C22C 38/22 (2006.01) F16B 35/00 (2006.01)

Patent

CA 1263259

ABSTRACT A high strength bolt made of a steel having a specifically defined chemical composition, i.e., by weight C: 0.30-0.50%, Si: not more than 0.15%; Mn: not more than 0.40%; Cr: 0.30-1.50%; Mo: 0.10 0.70%; and V: 0.15-0.40%, the balance being Fe and inevitable impurities such as P, S, etc. in trace amount. The manufacturing method therefor utilizes a strictly controlled heat treatment in respect to its temperature range such as: hardening by quenching from 940 ? 10°C and tempering 575 ? 25°C.

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