Fatigue life is the ability of a steel shot (sand) to resist breaking when it acts on the working surface. The abrasive with the longest fatigue life will be the most economical abrasive if it can transfer the proper amount of energy to cleaning. No matter which field of application, the quality of steel shot and steel grit is the key to effective operation. It determines whether energy can be effectively converted during use, plays a role in cleaning and strengthening, and also determines your processing cost.