What details should you pay attention to when buying steel grit?

　　1. Clarify application requirements

　　Understand application scenarios:

　　Choose the appropriate type of steel grit according to specific application scenarios such as preliminary grinding of metal surfaces, fine polishing, or cleaning of concrete surfaces.

　　Confirm particle size and hardness:

　　Particle size: The particle size of steel grit is usually expressed in mesh. The larger the mesh, the smaller the particle size. The most suitable particle size should be selected according to the processing material and workpiece requirements and process requirements. For example, 2050 mesh steel grit is suitable for surface grinding and cleaning, 50100 mesh is suitable for fine surface polishing, and 100 mesh or above is suitable for processing fine parts.

　　Hardness: Choose steel grit of appropriate hardness according to the material and surface condition of the workpiece to be processed, as well as the processing effect to be achieved. Too high hardness may lead to unsatisfactory surface description and increase the probability of sand breakage; too low hardness may reduce cleaning speed and work efficiency.

　　2. Pay attention to steel grit quality

　　Check the metallographic structure:

　　The microstructure of steel grit should be able to resist deformation to reduce energy loss and increase fatigue life. Tempered martensite is one of the most fatigue-resistant microstructures.

　　Analyze the chemical composition:

　　The carbon content should be moderate. Silicon and manganese can improve the strength and hardness of steel grit and should be as high as possible. Sulfur and phosphorus are harmful elements that can easily make steel grit brittle and cause premature fracture, so they should be as low as possible.

　　Evaluate fatigue life:

　　Fatigue life is the ability of steel grit to resist crushing when it acts on the working surface. Abrasives with the longest fatigue life will become the most economical abrasives.

　　Check physical defects:

　　Steel grit should contain as few physical defects as possible that can cause abrasive fracture. There should be corresponding processes in production for control to reduce the proportion of defective particles.

　　3. Consider suppliers and prices

　　Choose suppliers with good reputation:

　　Prefer suppliers with many years of production experience, stable product quality and perfect after-sales service.

　　Compare prices and cost-effectiveness:

　　On the premise of ensuring quality, compare prices from different suppliers and choose steel grit with high cost-effectiveness.