Patent ID: 6918972

Claim:
A Ni-base alloy comprising: 0.01 to 0.15 mass % of C; not greater than 2.0 mass %, but greater than 0 mass % of Si; not greater than 2.5 mass %, but greater than 0 mass % of Mn; 12 to 25 mass % of Cr; 5.0 mass % or less of Mo and 5.0 mass % or less of W on condition that Mo+(W/2) be not greater than 5.0 mass %, but greater than 0 mass %; 1.5 to 3.5 mass % of Ti; 0.7 to 2.5 mass % of Al; not greater than 20 mass %, but greater than 0 mass % of Fe; and a balance of Ni and unavoidable impurities, wherein a ratio of Ti/Al in terms of atomic percentages ranges from 0.6 to 1.5 and a total content of Ti and Al ranges from 4.0 to 8.5 atomic %.