A.Z≤3% B.A≥3% C.Rm≥3% D.ReL≤3%
A.15% B.0.2-0.6% C.0.7-1.65% D.0.95-1.15%
A.合金工具鋼 B.合金調(diào)質(zhì)鋼 C.高速鋼 D.合金滲碳鋼