Steel Grit

Steel Grit is produced by crushing heat-treated steel shot into angular shapes. The performance of Steel Grit depends on its hardness, which can be modified by heat treatment and is reflected in different grades offered. Steel Grit is commonly used for cleaning surfaces prior to coating.

Chemical Composition

• C: 0.85 - 1.2%
• Si: 0.4 - 1.2%
• Mn: 0.62 - 1.2%
• S: ≤ 0.05%
• P: ≤ 0.05%

Physical Properties

• Hardness: GP: 40-50 HRC; GL: 50-55 HRC; GH: 55-60 HRC
• Specific Gravity (h40 = 1): ≥ 7.40 g/cm³
• Microstructure: Homogeneous tempered Martensite or Troosite
• External Form: Angular (spherical and semi-spherical; flat granules <10%)< /li>

Grits Available

• G10, G12, G14, G16, G18, G25, G40, G50, G80, G120
• Other sizes available upon request

Grades Offered

• GP: GP-grade Steel Grit, which is angular when new, rapidly becomes rounded in use, and delivers effective performance in certain applications such as descaling.
• GL: Although harder than GP-grade, GL-grade Steel Grit also loses its sharp edges during shot blasting and is particularly suited to heavy descaling and surface preparation. GL Steel Grit cleans rapidly to give a clean finish to all surfaces. In wheel-blast machines, GL and GH grades are equally suitable.
• GH: GH-grade Steel Grit, which has the greatest hardness, remains angular, does not easily shatter, and maintains a fast, effective cutting action, making it ideal for deep descaling and surface etching requirements.

Applications

• Surface Preparation: Used for blast cleaning of mill scale, dirt, rust, or paint coatings, and for physically modifying steel and other metal structures, castings, and surfaces. It creates roughness for better adhesion of paint or other coatings. Steel grit works best in tumblast applications where the eccentric rebound aids coverage. Airblast applications work best with high hardness grit for fast cleaning.
• Stone Cutting: Steel grit can be used in large multi-blade frames to cut blocks of granite.