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For low alloy high-strength structural steel: with a carbon content of 0.1% -0.25%, the main alloying elements such as mangan

For low alloy high-strength structural steel: with a carbon content of 0.1% -0.25%, the main alloying elements such as mangan

45#属钢材中的一种材质。属优质碳素结构钢。大量的模具生产公司会用到，做模具钢使用。

45#属钢材中的一种材质。属优质碳素结构钢。大量的模具生产公司会用到，做模具钢使用。