en-mb99.95-b(en-mb10031)年级：en-mb99.95-b数量：en-mb10031分类：非合金化镁标准：en12421:1998镁和镁合金。非合金化镁en-mb99.95-b级的化学成分%(en-mb10031)铁四锰镍铝铜铅镁锌锡别人***大0.005***大0.01***大0.01***大0.001***大0.01***大0.005***大0.005***小99.95***大0.01***大0.005每0.005;)