HIGH STRENGTH AUSTENITIC STAINLESS STEEL EXCELLENT IN HYDROGEN EMBRITTLEMENT RESISTANCE, MANUFACTURING METHOD THEREFOR, AND DEVICE FOR HYDROGEN USED IN HIGH PRESSURE HYDROGEN GAS AND LIQUID HYDROGEN ENVIRONMENT

摘要

PROBLEM TO BE SOLVED: To provide an austenitic stainless steel used under high pressure hydrogen gas and liquid hydrogen environment, having high strength and excellent in hydrogen embrittlement resistance.;SOLUTION: There is provided a high strength austenitic stainless steel excellent in hydrogen embrittlement resistance containing, by mass%, C:0.2% or less, Si:0.2 to 1.5%, Mn:0.5 to 2.5%, P:0.06% or less, S:0.008% or less, Ni:10.0 to 20.0%, Cr:16.0 to 25.0%, Mo:3.5% or less, Cu:3.5% or less, N:0.01 to 0.50%, O:0.015% or less and the balance Fe with inevitable impurities, and having average size of a deposit of 100 nm or less and the amount of the deposit of, by mass%, 0.001% to 1.0%.;SELECTED DRAWING: None;COPYRIGHT: (C)2017,JPO&INPIT