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纭� Si锛�0.20锝�0.45(鍏佽ū鍋忓樊:卤0.05)
閷� Mn锛�0.15锝�0.40(鍏佽ū鍋忓樊:+0.04)纭� S 锛氣墹0.030
纾� P 锛氣墹0.030
閴� Cr锛�3.80锝�4.40(鍏佽ū鍋忓樊:卤0.05)
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閵� Cu锛氬厑瑷辨畼浣欏惈閲忊墹0.25
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閴� Mo锛�4.50锝�5.50(鍏佽ū鍋忓樊:灏哄鈮�6,卤0.05;灏哄>6,卤0.10)
閹� W 锛�5.50锝�6.75(鍏佽ū鍋忓樊:灏哄鈮�10,卤0.10;灏哄>10,卤0.20)
纭害
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