In accordance with standards of SFSA20-66Cast Steel Abrasive, SAE J827 Cast Steel Shot, SAE J1993High Carbon Steel Grit, YB/T5149-1993 Cast Steel Shot, YB/T5150-1993Cast Steel Grit,ISO11124-3High Carbon Cast Steel Shot and Grit. Main Tech Specifications of Cast Steel Shot : Chemical Compositions C 0.70～1.20% Mn 0.60～1.20% Si 0.40～1.20% S≤0.05% P≤0.05% Average hardness （500gloading） Normal：40～50HRC (377～509HV) Special：52～56HRC (543～620HV) Special：56～60HRC (620～713HV) Hardness deviation: Max deviation?.0HRC,?0HV Metallography structure: Even tempered martensite and dispersed carbon Min density（Alcohol replace testing) :7.2g/cm3 Here below is the scope of our products: STEEL SHOT: S70 S110 S130 S170 S230 S280 S330 S390 S460 S550 S660 S780