NON-MAGNETIC CORROSION RESISTANT STEEL MATERIAL EXCELLENT IN HYDROGEN EMBRITTLEMENT RESISTANCE

摘要

PROBLEM TO BE SOLVED: To provide an inexpensive material having excellent hydrogen embrittlement resistance, tensile property and corrosion resistance.;SOLUTION: There is provided a non-magnetic corrosion resistant steel material which contains, by mass%, C:0.15 to 1.00%, Si:0.15 to 0.80%, Mn:6.0 to 10.0%, P:0.050% or less, S:0.030% or less, Ni:5.0 to 16.0%, Cr:8.0 to 15.0%, Cu:0.20 to 0.65%, V:0.30 to 2.00%, N:0.0150 to 0.1000% and the balance Fe with inevitable impurities, and which is excellent in hydrogen embrittlement resistance and mechanical properties, and in which a deposit composed of V (C, N) is 1 to 50 nm and V/{4([C]+[N])}=0.50 to 1.00, {16([C]+[N])-3[V]}/([Cr]+0.9[Ni]-16[N])}=0.075 to 0.250, 551-462([C]+[N]-0.07[V])-9.2[Si]-8.1[Mn]-13.7[Cr]-29([Ni]+[Cu])-18.5[Mo]≤-40.;SELECTED DRAWING: None;COPYRIGHT: (C)2017,JPO&INPIT