| 摘要 |
PURPOSE:To obtain an austenitic stainless steel with superior stress corrosion cracking resistance by specifying a composition consisting of C, Si, Mn, S, Ni, Cu, P and Fe and the relation between components in the composition. CONSTITUTION:This austenitic stainless steel consists of, by weight, <=0.08% C, <=1.0% Si, <=2.0% Mn, <=0.03% S, 6.0-20.0% Ni, 16.0-25.0% Cr, Cu and P by amounts satisfying equations 30P%+0.6<=Cu%<=3.0 and P%<=(Cu%+1.5)/200, and the balance Fe with inevitable impurities. The steel is provided with superior stress corrosion cracking resistance by allowing Cu and P among the components to satisfy said relation. The stress corrosion cracking resistance of the weld zone can be improved furthermore by adding 0.1-1.0% Ti and/or Nb.
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