... all grades of S.G.Iron. 2. Chemical composition: Si, Mg, RE, Ca, Al, Fe. 3. Size:0.5-3mm. ... 5-15 mm, 15-25 mm.3. Chemical composition: Si, Mg, RE, Ca, Al, Fe.4. Specs:FeSiMg5RE1 Si: 45-55 ... %, Mg: 4.5-5.5%, RE: 0.3-1.0%, Ca ... 1.0%, Al: 1.2%max.FeSiMg6RE1 Si: 45-55%, Mg: 5.5-6.5%, RE: 0.3-1.0%, ... 1.0%, Al: 1.2%max.FeSiMg7RE1 Si: 45-55%, Mg: 6.5-7.5%, RE: 0.3-1.0%, ...