Pitting corrosion resistant austenite stainless steel

Abstract

A pitting corrosion resistant austenite stainless steel comprising not more than 0.08% by weight of carbon, not more than 4% by weight of silicon, not more than 5.0% by weight of manganese, not more than 0.04% by weight of phosphorus, not more than 0.03% by weight of sulfur, 10 to 18% by weight of nickel, 23 to 30% by weight of chromium and 0.30 to 0.45% by weight of nitrogen, the balance being iron and unavoidable impurities, and satisfying the condition of Ni % + 30 (C % + N %) ≧ 20%.

What is claimed is: 
     
       1. A pitting corrosion resistant austenite stainless steel consisting essentially of .Iadd.not more than .Iaddend.0.08% by weight of carbon,   silicon in an amount not exceeding 4.0% by weight,   manganese in an amount not exceeding 5.0% by weight,   phosphorus in an amount not exceeding 0.04% by weight,   sulfur in an amount not exceeding 0.03% by weight,   10 to 18% by weight of nickel,   23 to 30% by weight of chromium,   0.30 to 0.45% by weight of nitrogen, and   0.1 to 4.0% by weight of molybdenum,   the balance being iron and unavoidable impurities, said steel satisfying the condition of Ni % + 30 (C % + N %) ≧ 20%.