High-tension high-toughness steel having excellent resistance to

Details High-tension high-toughness steel having excellent resistance to High-tension high-toughness steel having excellent resistance to

1982-09-21

1985-08-27

Skiff, Peter K.

Metal treatment

Compositions

Heat treating

148144, 75123B, 75126D, 75126P, C22C 3814, C22C 3828, C22C 3832

Patent

active

045376441

ABSTRACT:
A high-tension high-toughness steel excellent in resistance to delayed fracture which consists essentially of 0.15 to 0.50% of C, up to 1.50% of Si, 0.20 to 1.50% of Mn, up to 2.00% of Cr, 0.0005 to 0.0030% of B, 0.005 to 0.10% of acid-soluble Al, up to 0.010% of P, up to 0.0020% of N, 0.010 to 0.050% of Ti and the balance iron and inevitable impurities, and has a tempered martensitic structure obtained by quenching and tempering.

REFERENCES:
patent: 2858206 (1958-10-01), Boyce
patent: 3251682 (1966-05-01), Wada
patent: 3574602 (1971-04-01), Gondo et al.
patent: 3617230 (1971-11-01), Richards et al.
patent: 3664830 (1972-05-01), Kambayashi et al.

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