| 摘要 |
PROBLEM TO BE SOLVED: To provide a steel material containing Cu and Sn and having no crack or flaw on a surface.SOLUTION: There is provided a Cu-Sn coexistence steel material containing, by mass%, C:0.04 to 0.20%, Si:0.05 to 1.0%, Mn:0.2 to 2.5%, P:0.05% or less, S:0.02% or less, Cu:0.20 to 1.20%, Ni:0.05 to 1.00%, Sn:0.06 to 0.50%, sol.Al:0.04% or more and less than 0.20% and Nd:0.005% or more and less than 0.10% and the balance Fe with impurities and having sum of the content of sol.Al and the content of Nd is 0.05 to 0.21%.SELECTED DRAWING: None |
