Method of manufacturing steel for low temperature services

Details Method of manufacturing steel for low temperature services Method of manufacturing steel for low temperature services

1974-03-18

1976-03-23

Stallard, W.

Metal treatment

Compositions

Heat treating

148 12F, C21D 713

Patent

active

039458580

ABSTRACT:
A low alloy steel substantially consisting of Ni-Cr-Cu-Nb system and further adding 0.01 to 0.10% rare earth metals or their alloy thereto, and then being as only hot-rolled by 30 to 80% rolling rate at a temperature of less than 950.degree.C. The steel exhibits absorption energy of at least 10kg-m at -20.degree.C and a .sub.D T.sub.C transition temperature of lower than -40.degree.C, if necessary, may be tempered at a temperature of 500.degree. to 680.degree.C to improve the properties.

REFERENCES:
patent: 2823992 (1958-02-01), Bolkcom et al.
patent: 3666452 (1972-05-01), Korchynsky et al.
patent: 3666570 (1972-05-01), Korchynsky et al.
patent: 3671336 (1972-06-01), Korchynsky et al.
patent: 3711340 (1973-01-01), Korchynsky et al.
patent: 3806378 (1974-04-01), Bramfitt et al.

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