| 摘要 |
PROBLEM TO BE SOLVED: To provide a steel which has more excellent pitting resistance. SOLUTION: The steel has a composition containing, by mass, <=0.20% C, <=2.0% Si, >0.3 to 3.5% Mn, <=0.10% P, <=0.02% S, 0.005 to 0.10% Al and 0.002 to 0.50% Sb, and in which the above Mn, P and Sb are contained also so as to satisfy the following inequality of 0.003Mn%+0.02P%<=Sb%, and the balance Fe with inevitable impurities.
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