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4140鍚堥噾閶煎寲瀛�(xu茅)鎴愪唤锛�
纰� C 锛�0.38锝�0.43
纭� Si锛�0.15锝�0.35
閷� Mn锛�0.75锝�1.00
纭� S 锛氬厑瑷辨畼浣欏惈閲忊墹0.040
纾� P 锛氬厑瑷辨畼浣欏惈閲忊墹0.030
閴� Cr锛�0.80锝�1.10
閹� Ni锛氬厑瑷辨畼浣欏惈閲忊墹0.030
閵� Cu锛氬厑瑷辨畼浣欏惈閲忊墹0.030
閴� Mo锛�0.15锝�0.25
