| 摘要 |
PROBLEM TO BE SOLVED: To provide a steel material for cold working capable of providing high strength even with omitting a heating treatment, and excellent in cold workability and hydrogen embrittlement.SOLUTION: There is provided a steel material for cold working having a composition containing C of 0.02 mass% or less (excluding 0 mass%), N of 0.005 to 0.03 mass%, P of over 0.05 mass% and 0.3 mass% or less, Si of 3 mass% or less (excluding 0 mass%) and Mn of 3 mass% or less (excluding 0 mass%); limiting S to 0.05 mass% or less, Al to 0.02 mass% or less, V to 0.02 mass% or less, Ti to 0.02 mass% or less, Nb to 0.02 mass% or less, and Zn to 0.02 mass% or less; consisting the balance Fe with inevitable impurities; and having solid solution nitrogen content of 0.004 to 0.03 mass%.SELECTED DRAWING: None |
