PRODUCTION OF STEEL FOR PRESSURE VESSEL EXCELLENT IN SOHIC RESISTANCE

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a steel capable of suppressing SOHIC in the case of being used in a wet hydrogen sulfide environment. ;SOLUTION: A steel contg., by weight, 0.05 to 0.25% C, 0.1 to 1.0% Si, 0.2 to 1.8% Mn, 0.01 to 0.35% Cu, 0.01 to 0.5% Ni, 0.01 to 0.5% Cr, 0.01 to 0.5% Mo and 0.005 to 0.1% Al, furthermore contg., at need, 0.002 to 0.1% V and 0.002 to 0.1% Nb, and the balance Fe with inevitable impurities is heated at 750 to 850°C and is thereafter air-cooled.;COPYRIGHT: (C)1997,JPO