In modern industry, steel grit, as an important abrasive, is widely used for metal surface cleaning, deburring, derusting, and surface strengthening treatments.With the development of industrial technology, the quality requirements for steel grit are becoming increasingly stringent.

Definition and Applications of Steel Grit:

Steel grit is an abrasive made from high-carbon steel or alloy steel scrap through special processing. It finds wide applications in polishing and grinding of metallurgy, hardware, glass, gemstones, jade, as well as in the manufacturing of abrasives. The primary uses of steel grit also include metal surface derusting, sand removal, and stone cutting.

（G12）

High-quality steel grit should meet the following criteria:

1.Chemical Composition: The chemical composition of high-quality steel grit should adhere to strict standards, with a carbon content of 0.8%-1.2%, a manganese content of 0.35%-1.2%, a silicon content of no less than 0.4%, and sulfur and phosphorus contents controlled below 0.05%.

2.Physical Properties: The microhardness should range between 390HV-530HV, with a density of no less than 7.0g/cm³. The total defects should not exceed 40%, foreign impurities should be less than 1%, and the moisture content should be controlled below 0.2%.

3.Particle Size and Shape: The particle size should be uniform, and the shape should predominantly be polygonal, which enhances the efficiency and quality of surface treatment.

4.Surface Treatment Effect: The metal surface treated with steel grit should achieve international standards for cleanliness, with a surface roughness between 25-150um to increase the contact area of the metal surface and improve the adhesion of coatings.

（The latest new enterprise standard）

Market Data:

According to market research reports, the internet market size for steel grit is estimated to be 1.1billionin2023andisprojectedtoreach2.3 billion by 2030, with a compound annual growth rate of 8.4%. This data indicates that, with the growth in industrial demand, the demand for high-quality steel grit is also on the rise.

Industry Standards and Certifications:

The production and application of steel grit follow strict national standards, such as China's GB/T18838.3-2008 standard, which sets clear requirements for the chemical composition, physical properties, and application effects of steel grit. Additionally, there are explicit specifications for the marking and classification of steel grit products. For example, cast steel grit with a particle size of 2.0mm and a hardness of H is marked as CSG-20H.

High-quality steel grit is an indispensable material for industrial surface treatment. It should possess good chemical composition, physical properties, uniform particle size, and shape characteristics, as well as meet international standards for surface treatment effects. With the continuous expansion of the internet market, the demand for high-quality steel grit is increasing, requiring manufacturers to continuously optimize production processes and improve product quality to meet the high standards of market and industrial applications.

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