45鋼，平均含(han)(han)碳量(liang)為0.42-0.50%,平均含(han)(han)硅量(liang)為0.17-0.37%,平均含(han)(han)錳量(liang)為0.50-0.80%,平均含(han)(han)硫(liu)量(liang)<=0.035%,平均含(han)(han)磷量(liang)<=0.035%,平均含(han)(han)鉻(ge)量(liang)<=0.25%,平均含(han)(han)鎳量(liang)<=0.2545鋼含(han)(han)碳0.45%左右.45#無縫管主要用于(yu)制造齒輪、齒條、鏈輪、軸、鍵、銷、蒸汽透(tou)平機的葉輪、壓縮機泵的零(ling)件(jian)