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★20CrNiMoA执行标准:GB/T3077-1999 ★20CrNiMoA化学成份:注:具体化学成分以钢厂质保书为准。碳C:0.17~0.23硅Si:0.17~0.37锰Mn:0.60~0.95硫S:残余含量≤0.035磷P:残余含量≤0.035铬Cr:0.40~0.70镍Ni:0.35~0.75铜Cu:残余含量≤0.30 钼Mo:0.20~0.30 ★20CrNiMoA热处理:淬火加热温度(℃):850;冷却剂:油回火加热温度(℃):200;冷却剂:空★20CrNiMoA力学性能:注:具体力学性能以钢厂质保书为准。抗拉强度σb(MPa):≥980(100)屈服强度σs(MPa):≥785(80)伸长率δ5(%):≥9断面收缩率ψ(%):≥40冲击功Akv(J):≥47 ★20CrNiMoA交货状态:以热处理(正火、退火或高温回火)或不热处理状态交货,交货状态应在合同中注明。



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