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 1171698

ABSTRACT OF THE DISCLOSURE Chromium-molybdenum structural steels which have high tensile strength, low subcaptability to temper embrittle- ment, high hydrogen attack resistivity and high temperature ductility and which can be formed into very thick steel plates comprise 0.05 to 0.20% of C, 0 to 0.15% of Si, 0.46 to 1.00% of Mn, 2.00 to 3.50% of Cr, 0.80 to 1.20% of Mo, 0.00015 to 0.0015% of B, 0.005 to 0.070% of Sol. Al and inevitably entrained impurities, the balance to make up 100% of Fe. Preferably the inevitably entrained impurities of nitrogen and phosphorus are below 0.0060% of N and 0.0010% of P.

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