| 简介 |
PROBLEM TO BE SOLVED : To provide a martensitic free cutting stainless steel which has excellent cold forgeability, machinability, hot producibility and environmental harmonization without incorporation with harmful elements such as Pb. SOLUTION : The stainless steel has a composition containing, by mass, <=0.40% C, <=3.0% Mn, <=0.1% P, 10 to 17% Cr, 0.03 to 0.3% Sn and <=0.1% N as fundamental components, and, if required, containing 0.05 to 0.4% S, 0.05 to 0.4% Si, <0.01% Al and 0.005 to 0.015% O, also, one or more selected from 0.0005 to 0.02% B, 0.0005 to 0.02% Ca and 0.005 to 0.20% Bi, one or more selected from <=1.0% Ni, <=2.5% Cu, <=3.0% Mo and <=1.0% Co, <=0.3% Nb, <=0.3% V, <=0.3% W, <=0.3% Ta and <=0.3% Zr, and also, one or more selected from 0.0005 to 0.2% rare earth metals, 0.01 to 0.3% Ti and 0.0005 to 0.01% Mg, and the balance Fe with inevitable components. |
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