Technical Specifications of Steel Shots and Steel Grits:

1.Chemical Composition: As the most fundamental indicator, it determines the microstructure and subsequent heat treatment effect of steel shots and grits. Carbon (C), Silicon (Si) and Manganese (Mn) can enhance the strength and hardness of steel shots, while Sulfur (S) and Phosphorus (P) are harmful elements that easily cause brittleness and premature fracture, so their content should be kept as low as possible.

2.Hardness: Higher hardness of steel shots brings faster processing speed, but excessive hardness will lead to unsatisfactory surface morphology, higher shot breakage rate, excessive consumption, severe equipment wear and increased maintenance cost, so proper hardness is critical.

3.Microstructure: The microstructure of steel shots (grits) must resist deformation, reduce energy loss when acting on the working surface and extend fatigue life. Tempered martensite has the best fatigue resistance, and brittle carbides in the microstructure must be minimized to avoid premature fracture and increased usage.

4.Physical Defects: Due to production processes, steel shots (grits) inevitably have certain physical defects that cause abrasive fracture. Corresponding control procedures must be adopted in production to reduce the proportion of defective particles.

5.Fatigue Life: It refers to the fracture resistance of steel shots (grits) when acting on the working surface.

Comparison Table of Technical Specifications for Steel Shots and Steel Grits

Steel shot and grit size distribution