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型钢的牌号和化学成分
牌号化学成分（质量分数）（%）
CSiMnVPS
≤
16MnK0.12"-' 0.200.20"-'0.551.20"-'1.60 0.0450.045
20MnK0.15"-' 0.260.20"-'0.601.20"-'1.60 0.0500.050
25MnK0.21"-' 0.310.20"-'0.601.20"-'1.60 0.0500.050
20MnVK0.17"-'0.240.17"-'0.371.20"-'1.600.07"-'0.200.0450.045
25MnVK0.22"-'0.300.50"-'0.901.30"-'1.600.06"-'0.130.0500.050
型钢的力学和工艺性能
牌号屈服点 s/MPa抗拉强度 h/MPa伸长率 (%)冷弯180° d=弯心直径 a=试样厚度
≥
16MnK32549021d=3a
20MnK33549016
25MnK33552016
20MnVK39057014
25NnVK49063518
