Steel shot 1. Production specification: s780, s660, s550, s460, s390, s330, s280, s230, s170, s110, s70 3. Hardness: normal: 40-50hrc special: 52-56hrc, 56-60hrc density: 7.4g/cucm 4. Steel shot is used for industrial foundry, forging plant, heat treatment shop, steel construction plant, container manufacturer, ship builder, auto and locomotive manufacturer . 5. Microstructure: tempered marten site high strength, durable ervin life: cast steel shot: 2000 cycles