en-mammn2(en-ma40020)年级：en-mammn2数量：en-ma40020分类：镁合金阳极铸件标准：en12438:1998镁和镁合金。铸造阳极用镁合金en-mamgmn2级化学成分%(en-ma40020)铁四锰镍铝铜锌别人-***大0.03***大0.051.2-2。5***大0.002***大0.01***大0.02***大0.05每0.05;镁-余数;as+sb+pb+cr+ni<0.1;cd+hhg+se<0.01)