en-mcmgal4si(en-mc21320)年级：en-cmgal4si数量：en-mc21320分类：镁合金铸件标准：en1753:1997镁和镁合金。镁合金锭和铸件e-mcmgal4si级化学成分%(en-mc21320)铁四锰镍铝铜锌别人-***大0.0050.5-1。5***小0。1***大0.0023.5-5***大0.01***大0。2总计0.01镁-剩余部分)