Appearance is black and bright, shot form Martensite.  Applied in shot blasting surface cleaning of raw Iron, tin, carbon steel and other casting extensively!

Main chemistry: C 0.85-1.20%  Si 0.40-1.50%  Mn 0.60-1.20%

Cr 0.09-1.20%  Mo 0.15-0.25%

Density: 7.4g/ cucm             Hardness:40-50HRC