Chemical coposition: C---0.85-1.20% Si---0.40-1.20% Mn---0.60-1.20% S ----=<0.05% P ----=<0.05% Hardness: HRC46-50/HRC56-60/HRC63-65 Microstructure: Homogenous tempered martensite or troostite Density: >=7.40g/cm3 External form: Polygon, Spherical, hemispherical, (flat-shaped particles<5% Crack 40%) Application: Blast cleaning: Used for blast cleaning of casting, die-casting, forging; sand removal of casting, steel plate, H type steel, steel structure. Rust removal: Rust removal of casting, forging, steel plate, H type steel, steel structure. Shot peening: Shot peening of gear, heat treated parts. Shot blasting: Shot blasting of profile steel, ship board, steel board, steel material,steel structure. Pre-treatment: Pre-treatment of surface, steel board, profile steel, steel structure, before painting or coating.