Austenite Alloy Material

Abstract: Provided is an austenite alloy material having excellent nitriding resistance in a high-temperature ammonia environment. The austenite alloy material of the present disclosure contains, in mass%, C: more than 0 to 0.200%, Si: more than 0 to 3.00%, Mn: more than 0 to 3.00%, P: more than 0 to 0.050%, S: more than 0 to 0.050%, Ni: 40.00 to 80.00%, and Cr: 10.00 to 35.00%, also contains one or more selected from the group consisting of Sn, Zn, Pb, Sb, As, and Bi, also contains one or more selected from the group consisting of Cu, Mo, Co, W, Ti, Nb, V, B, N, rare earth elements, Al, Ca, and Mg, with the remainder comprising Fe and impurities. Fn1 is less than 20, and Fn2 is higher than 21 and less than 50. Fn1=177.84+11.12Si-24.36Mn-8.11Cu-1.61Cr-1.78Ni-2.68Mo Fn2=(Sn+Zn+Pb+Sb+As+Bi)×103

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