PWHT Steel Plate For Pressure Vessel With Excellent PWHT Resistance And Manufacturing Method Thereof

摘要

The present invention relates to a ferritic stainless steel comprising, by weight, 0.07 to 0.17% of C, 0.15 to 0.40% of Si, 0.3 to 0.7% of Mn, 0.012% or less of P, 0.015% or less of S, 3.0 to 4.0% 0.03 to 0.25% of Fe, unavoidable impurities, tempered bainite having a microstructure of 25 to 80% by area and residual tempered martensite, a low-temperature toughness having a tensile strength of 600 MPa or more and a low- To a container steel sheet and a manufacturing method thereof.