Alloy Material

Abstract: Provided is an alloy material that has sufficient creep strength in a high temperature environment and is capable of attaining both excellent resistance to stress relaxation cracking and excellent resistance to welding hot cracking. The alloy material according to the present disclosure contains, in mass%, 0.050-0.100 % of C, 1.00 % or less of Si, 1.50 % or less of Mn, 0.035 % or less of P, 0.0015 % or less of S, 19.00-23.00 % of Cr, 30.00-35.00 % of Ni, 0.100 % or less of N, 0.15-0.70 % of Al, 0.15-0.70 % of Ti, and 0.0010-0.0050 % of B, with the remainder consisting of Fe and impurities. The alloy material satisfies formulae (1) and (2). (1): 0.60

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