... fast cleaning speeds at reduced costs.2. Steel shot: S70, S110, S170, S230, S280, S330, S390, S460, S550, S660, S780 Steel ... <0.030Hardnesssteel shotHRC40-50HRC55-62HRC44-48HRC58-62Densitysteel shot≥7.20 g/cm37.4g/cm3MicrostructureTempered Martensite or TroostiteTempered Martensite Bainite Composite organizationAppearanceSpherical ...