65MN大圆钢65MN钢板65MN弹簧钢
弹簧钢和轴承钢:C67ECK671.1231C75ECK751.1248C85ECK851.1269C10ECK1011.127438Si61.502238Si71.502346Si71.502451Si71.502555Si756Si71.502665Si71.502871Si71.502960SiMn51.514251MnV71.522554SiCr61.710260SiCr71.710867SiCr51.710355Cr31.717651Cr***50CrV41.815958CrV41.8161......)