THICK STEEL PLATE FOR PRESSURE VESSEL EXCELLENT IN HYDROGEN INDUCED CRACKING RESISTANCE UNDER STRESS

摘要

PURPOSE: To provide a thick steel plate for pressure vessel excellent in hydrogen induced cracking resistance under stress. ;CONSTITUTION: The thick steel plate for pressure vessel excellent in hydrogen induced cracking resistance under stress and having a composition consisting of, by weight, 0.08-0.25% C, 0.1-0.5% Si, 0.8-1.6% Mn, 0.1-0.35% Cu, 0.05-0.35% Ni, 0.02-0.4% Cr, 0.02-0.3% Mo, 0.005-0.015% Ti, 0.005-0.05% Al, 0.015% P, 0.0005-0.002% S, 0.002-0.01% N, and the balance Fe with inevitable impurities and further containing, if necessary, one or two kinds among the strength improving element group consisting of 0.01-0.05% V and 0.005-0.05% Nb is produced.;COPYRIGHT: (C)1993,JPO&Japio