... special ferro alloy, etc. Ferro Silicon Chemical analysis:1>. Si 76-78%, Al 0.1%max, C 0.05% ... %max,P 0.03%max, Ca 0.07%max;4>. Si 74-79%, Al 0.1%max, C 0.03 ... Pb 0.03%max, Zr 0.03%max;5>. Si 75-60%, Al 0.2%max, C 0.015% ... .1%max, Cr 0.1%max, Ni 0.4%max;6>. Si 75-60%, Al 0.04%max, C 0 ... .1%max, Cr 0.1%max, Ni 0.4%max;7>. Si 75-60%, Al 0.02%max, C 0 ... Mn 0.01%max, Cr 0.05%max;10>. Si 75-60%, Al 0.01%max, C 0.015% ...