en-mmgmn2(en-mb40020)年级：en-mmgmn2数量：en-mb40020分类：阳极铸件用镁合金锭标准：en12438:1998镁和镁合金。铸造阳极用镁合金en-mbmmn2级化学成分%(en-mb40020)铁四锰镍铝铜锌别人-***大0.02***大0.051.2-2。5***大0.001***大0.01***大0.02***大0.05每0.05;镁-剩余部分)