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简介 GCr4介绍 球化或软化退火钢材硬度 176-207HBW供热压力加工用热轧不退火材,需方有硬度要求时,≥302HBW,当需方要求以“退火+磷化+微拔”或“退火+微拔”交货的冷拉钢(直条或盘状),硬度≤229HBW GCr4化学成分 碳 C :0.95-1.05 硅 Si:0.15-0.30 锰 Mn:0.15-0.30 硫 S :≤0.030(答应偏差: 0.005) 磷 P :≤0.030(答应偏差: 0.005) 铬 Cr:0.35~0.50 镍 Ni:0.25 铜 Cu:≤0.20 


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