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

C - Chemistry, Metallurgy

22

C

75/137, 148/49

C22C 38/22 (2006.01)

Patent

CA 1171697

ABSTRACT OF THE DISCLOSURE Chromium-molybdenum steels which have high strength, 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, A1 and inevitably entrained impurities, the balance to make up ??? of Fe. Preferably the inevitable nitrogen and phosphorus impurities are kept below 0.0060% of N and 0.010% of 1.

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