1. FeSiMg alloys can be used for all grades of S.G.Iron. 2. Chemical composition: Si, Mg, RE, Ca, Al, Fe. 3 ... : 4.5-5.5%, RE: 0.3-1.0%, Ca: 0.2-1.0%, Al: 1.2%max.FeSiMg6RE1 Si: 45-55%, Mg: 5 ... .5-6.5%, RE: 0.3-1.0%, Ca: 0.2-1.0%, Al: 1.2%max.FeSiMg7RE1 Si: 45-55%, Mg: 6 ... .5-7.5%, RE: 0.3-1.0%, Ca: 0.2-1.0%, Al: 1.2%max.Remark: Tailor-made grades are also ...