As-rolled steel plate having improved low temperature toughness

Details As-rolled steel plate having improved low temperature toughness As-rolled steel plate having improved low temperature toughness

1977-02-14

1979-01-30

Dean, R.

Metal treatment

Compositions

Heat treating

75123N, 75123J, 75123K, 75124, 148 12F, C22C 3808

Patent

active

041371046

ABSTRACT:
A high strength steel plate of improved low temperature toughness useful for making an arctic grade line pipe is provided with the addition of 0.8 - 2.0% by weight of Ni and 0.0005 - 0.0040% by weight of Ca, which may be used in the as-rolled state and manufactured through two step controlled rolling the secondary step rolling of which is carried out at a temperature lower than a conventional rolling temperature.

REFERENCES:
patent: 3811873 (1974-05-01), deBarbadillo
patent: 3834949 (1974-09-01), Heitmann et al.

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