Product Name: S170/0.5mm High Quality Steel Shot in Blast Cabinet for Sand Peening Equipment Use Model NO.: S170 Hardness: HRC40-50 Particle Size: 0.5mm Source: Artificial Abrasives Function: Descaling Application: metal Parts Artificial Abrasive Type: Steel Shot Natural Abrasive Type: Steel Shot Model: S50-S930 Chrome Content C: 0.85-1.2% Chrome Content Si: 0.40-1.20% Chrome Content Mn: 0.60-1.20% Chrome Content S: ?0.05% Chrome Content P: ?0.05% Microstructure: Homogeneous Tempered Martensite or Troostite Density: ?7.20g/Cm