Method for producing a high toughness and high tensil steel

Details Method for producing a high toughness and high tensil steel Method for producing a high toughness and high tensil steel

1975-02-10

1976-08-24

Stallard, W.

Metal treatment

Compositions

Heat treating

C21D 714

Patent

active

039765148

ABSTRACT:
A method for producing a high tensile strength steel plate which comprises subjecting to a low temperature rolling, a steel composition containing not more than 0.25% of carbon, not more than 0.5% of silicon, 0.5 to 2.0% of manganese, not more than 0.015% of sulfur, 0.005 to 0.1% of aluminum, one or more of niobium, vanadium and titanium in an amount not less than 0.01%, and REM in an amount not less than 1.3 times the amount of sulfur, with optionally one or more of nickel, chromium and copper, with the balance being iron and unavoidable impurities, which steel possesses a low notch toughness transition temperature and high absorbed energy in the notch-impact test, and is suitable in the as rolled condition for use as pipe lines in cold districts.

REFERENCES:
patent: 3645801 (1972-02-01), Melloy et al.
patent: 3671336 (1972-06-01), Korchynsky et al.
patent: 3711340 (1973-01-01), Korchynsky et al.
patent: 3787250 (1974-01-01), Korchynsky et al.

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