The active element in CaSi is calcium. CaSi alloy is more economical than pure calcium for the treatment of silicon killed steel. The Calcium treatment of liquid steel is essential with the objective of combining calcium with alumina and sulfide inclusion in order to control shape, distribution and fluidity of the so modified inclusions with following beneficial effects Full Name : Calcium silicide Type of product : Ca bearing alloy (CaSi2) Ca element Melting point (Ca): 1010°C (1670°F) Density at 20°C (68°F) : 2.40g/cm3