GBT 1591-2008标准（英文版）

~0.48骂王0.48Q550.47骂王0.48运0.48Q620~0.48~0.49~0.49Q690~0.49~0.49~0.496.1.9热机械轧制(TMCP)或热机械轧制加回火状态交货钢材的碳含量不大于0.12%时,可采用焊接裂纹敏感性指数(Pcm)代替碳当量评估钢材的可焊性.Pcm应由熔炼分析成分并采用公式(2)计算,其值应符合表5的规定.Pcm=C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/1S+V/10+5B.........(2)经供需双方协商,可指定采用碳当量或焊接裂纹敏感性指数作为衡量可焊性的指标,当未指定时,6.1.9IfCEVofthesteeldeliveredintheconditionofhotmechanicalrolling(TMCP)orhotmechanicalrollingplustemperingisnotmorethan0.12%,sensitivityindexofweldedcracks(Pcm)couldbeusedtoreplaceCEVtoevaluatetheweldabilityofsteel.Pcmshouldbeanalyzedbymeltinganalysisandcountedbyformula(2).Itsvalueshallconformtotable5.Pcm=C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B(2)Throughagreementofsupplierandbuyer,CEVorsensitivityindexofweldedcrackscouldbefixedasindextoevaluatetheweldability.Iftheyarenotfixed,suppliercanchooseanyofthem.Table5