Cast Steel Shot, sometimes is also call Steel Shot is a excellent Metal Abrasive used on die casting for surface treatment. Longlived Steel Shot has a great durability. Its fatigue life could be 3000-3500 times. There are three types of hardness of Longlived Steel Shot and they are HRC40-50, HRC 52-56 and HRC 56-60. They could meet most of requirements of shot blasting. More importantly, Longlived Steel Shot is very cost-effective so that it is one of the most ideal Metal Abrasive.