High Cr-based austenitic stainless steel

A high Cr-based austenitic stainless steel with a chemical composition consisting of in terms of % by mass:

• 0.03 to 0.12% of C,
• 0.10 to 1.00% of Si,
• 0.10 to 3.00% of Mn,
• 0.030% or less of P,
• 0.020% or less of S,
• 21.50 to 28.00% of Cr,
• more than 26.00 and not more than 35.00% of Ni,
• more than 2.00 and not more than 5.00% of W,
• 0.80% or less of Co,
• 0.01 to 0.70% of V,
• 0.15 to 1.00% of Nb,
• 0.001 to 0.040% of Al,
• 0.0001 to 0.0100% of B,
• 0.010 to 0.400% of N,
• 0.001 to 0.200% of Zr,
• 0.001 to 0.200% of Nd,
• 0.001 to 0.200% of Ta,
• 0.020 to 0.200% of Ta+0.8Nd+0.5Zr,
• 0.010% or less of Ti,
• 0.010% or less of Sn,
• 0.010% or less of Sb,
• 0.001% or less of Pb,
• 0.001% or less of As,
• 0.001% or less of Bi,
• 0.025% or less of Ti+Sn+Sb+Pb+As+Bi,
• 0.0090% or less of O,
• 4.00% or less of Cu,
• 2.00% or less of Mo,
• 0.20% or less of Ca,
• 0.20% or less of Mg,
• 0.20% or less in total of one or more of Y, Sc, Hf, Re, or lanthanoid elements other than Nd, and a remainder consisting of Fe and impurities.