易切削结构钢:SUM22L
执行标准:JIS G4804-1999●化学成份:
碳 C :≤0.13
硅 Si:≤0.15
锰 Mn:0.70~1.00
硫 S :0.24~0.33
磷 P :0.07~0.12
铅 Pb:0.10~0.35
力学性能:
抗拉强度 σb (MPa):(热轧)390~540; (冷拉)钢材厚度或直径 8~20时:530~755; >20~30时:510~735; >30时:490~685
伸长率 δ5 (%):(热轧)≥22;(冷轧)≥7.0
断面收缩率 ψ (%):(热轧)≥36
硬度 :(热轧)≤170HB;(冷拉)152~217HB
交货状态:以热轧或冷拉状态交货,交货状态应在合同中注明
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