Austenitic stainless steel excellent in penetration resistance of Cu grain boundary during Cu brazing

摘要

PROBLEM TO BE SOLVED: To provide an austenite stainless steel excellent in Cu grain boundary permeability resistance having suppressed grain boundary permeability of Cu wax generated during Cu brazing while securing original corrosion resistance level which austenite stainless steels such as SUS304 series and SUS316 series.SOLUTION: There is provided an austenite stainless steel excellent in Cu grain boundary permeability resistance during Cu brazing containing C:0.06% or less, Si:1.0 to 5.0%, Mn:1.0% or less, P:0.045% or less, S:0.003% or less, Ni:8.0 to 17.0%, Cr:16.0 to 20.0%, Mo:0.5 to 2.5%, Cu:4.0% or less, N:0.1% or less, and one or more kinds of Al:0.2% or less, Nb:0.2% or less and Ti:0.2 or less with Si+Cr+Mo≥20% and the balance Fe with inevitable impurities.