THICK STEEL PLATE FOR PRESSURE VESSEL EXCELLENT IN SOHIC RESISTANCE IN WET HYDROGEN SULFIDE ENVIRONMENT

摘要

PURPOSE: To produce a thick steel plate for pressure vessel excellent in SOHIC resistance in a wet hydrogen sulfide environment. ;CONSTITUTION: This steel plate has 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% Al, 0.0005-0.008% Ca, 0.015% P, 0.005% S, 0.002-0.01% N, and the balance Fe with inevitable impurities or further containing one or two kinds selected from the strength improving element group consisting of 0.01-0.05% V and 0.005-0.05% Nb.;COPYRIGHT: (C)1995,JPO