Chemical composition is the most basic indicator of steel shot and steel grit. It will determine the microstructure of steel shot and steel grit and the effect of subsequent heat treatment. National standards for high carbon cast steel shots and cast steel sand stipulate: carbon (C) content: 0.85-1.20%; silicon (Si) content: ≥0.40; manganese (Mn) content: 0.35-1.20%; sulfur (S) content: ≤0.05%; Phosphorus (P) content: ≤0.05%. The editor of Shandong Songhuai quietly tells you: Silicon and manganese can improve the strength and hardness of steel shots. They should be as high as possible (not less than 0.7% is the best). The content of steel grit in Songhuai steel shots is at the maximum. For those above the best standard, please refer to the test report of steel shot and steel grit for specific batches. Sulfur and phosphorus are harmful elements that can easily make steel shots brittle and lead to premature rupture. They should be as low as possible (<0.03% is optimal).

Please refer to the relevant knowledge of alloy steel shot