Steels which are useful in fabricating pressure vessels

Details Steels which are useful in fabricating pressure vessels Steels which are useful in fabricating pressure vessels

1981-02-25

1983-03-01

Skiff, Peter K.

Metal treatment

Compositions

Heat treating

148 123, C21D 802

Patent

active

043753779

ABSTRACT:
Chromium-molybdenum steels which have high strengths, good hydrogen attack resistivities, good high-temperature ductilities and high creep rupture strength, and which, when formed into steel plates, welded and given a high-temperature strain relief annealing treatment will acquire high resistivity to creep damage, comprises 0.11 to 0.17% of C, 0.50 to 1.20% of Si, 0.46 to 1.00% of Mn, 1.00 to 1.50% of Cr, 0.45 to 0.65% of Mo, 0.00015 to 0.0015% of B, 0.010 to 0.100% of Sol. Al and inevitably entrained impurities, the balance to make up 100% of Fe. Preferably the inevitable nitrogen and phosphorus impurities are kept below 0.0060% of N and 0.010% of P.

REFERENCES:
patent: 3251682 (1966-05-01), Wada
patent: 3288600 (1966-11-01), Johnsen, Jr. et al.
patent: 3463677 (1969-08-01), Nakamura et al.

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