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GL
72051000
SEPPE Steel Grit GL is a medium-hard cast steel grit that balances cleaning efficiency, abrasive life and operating cost. Compared with GP, GL keeps sharper cutting edges for faster rust removal and a clearer anchor profile. Compared with GH, GL has better toughness and lower breakage tendency, making it a practical mainstream grade for steel structures, construction machinery, storage tanks, pipelines and ship components.
Product: GL grade cast steel grit for rust removal, oxide scale removal and coating pre-treatment
Other Names: GL Steel Grit, Medium Hard Steel Grit, Angular Cast Steel Abrasive
Standard Reference: SAE J199 / common G series steel grit size grades
Manufacturer of Material: SEPPE TECHNOLOGIES
▸ GL steel grit is the balanced middle grade between tough GP and high-hardness GH.
▸ It provides stronger cutting than GP while maintaining better durability than GH, so it is often selected as the universal steel grit for structural steel and machinery surface preparation.
▸ GL is suitable for both wheel blasting machines and enclosed air blasting rooms where stable productivity and surface roughness are required.
▸ Balanced Cleaning Efficiency: Faster cutting than GP for medium rust, oxide scale and old paint removal.
▸ Stable Anchor Profile: Produces a controlled surface profile for epoxy, alkyd and polyurethane coating systems.
▸ Good Recycling Life: Medium hardness and controlled heat treatment help balance sharpness and breakage resistance.
▸ Wide Equipment Compatibility: Suitable for steel plate lines, hook-type machines, trolley blasting and blast rooms.
 | General Steel Construction ▸ Used for factory frames, space trusses, H-beams, container panels and welded steel sections. ▸ GL grade balances cutting speed, toughness and surface profile for mainstream steel blasting. ▸ Suitable for coating pre-treatment where a controlled anchor profile and stable productivity are required. |
 | Construction Machinery ▸ Used on loader arms, excavator parts, medium-thick plates and welded machinery structures. ▸ Medium-hard angular grit removes rust, oxide scale and old coating more efficiently than GP. ▸ A practical grade for machinery plants that need both cleaning speed and acceptable abrasive life. |
 | Pipes & Storage Tanks ▸ Used for carbon steel pipelines, storage tank walls and cylindrical steel parts before coating. ▸ GL grit creates a clear anchor profile for epoxy, polyurethane and anti-corrosion coating systems. ▸ Suitable for both automatic pipe blasting equipment and enclosed blasting rooms. |
 | Ship Components ▸ Used for ship profiles, plates, sections and marine steel components before coating. ▸ Balanced cutting removes medium rust and oxide scale while maintaining reasonable abrasive durability. ▸ Commonly selected for shipyards and marine steel workshops needing stable roughness control. |
▸ GL10-GL16: thick plate, heavy rust and stronger coating removal.
▸ GL18-GL40: universal mainstream grade for structural steel and general surface preparation.
▸ GL50 and finer: thin sheets, small parts and finer surface finish requirements.
▸ GL is the balanced middle grade for mainstream steel structure blasting, rust removal and coating pre-treatment.
▸ Steel grit works mainly by angular cutting. Compared with steel shot, it creates a clearer anchor profile and removes rust or coating more aggressively.
▸ Final selection should consider workpiece thickness, rust level, coating requirement, blasting machine type and target surface roughness.
▸ Scrap steel management - induction furnace melting - centrifugal atomization - drying - screening - quenching - spiral separation - grit crushing - tempering - final screening - packaging.
Raw material management 
Induction furnace operation 
Quenching line 
Screening & packaging line
▸ Intermediate stock is separated before final screening and packaging, helping keep different batches, sizes and processing stages traceable.
▸ For GL steel grit, the key control point is the balance between cutting speed, toughness and stable roughness.
▸ COA, sieve analysis, hardness report, retained sample and loading photos can be arranged according to order requirements.
| Main Size | G16, G18, G25, G40, G50, G80 and customized grades |
| Chemical Composition | C: 0.8-1.2%; Si: >=0.4%; Mn: 0.35-1.2%; S/P: <=0.05% |
| Hardness | HRC 53-60 typical |
| Density | >=7.6 g/cm3 |
| Package | 25 kg bags, 1000 kg jumbo bags, pallet package or customized export packing |
▸ Steel grit is listed in the SEPPE metal abrasives catalog under SAE J444 / GB/T 18838 reference systems, with GP, GL and GH hardness grades for different cutting strength and toughness requirements.
▸ Typical steel grit production route: scrap steel management - induction furnace melting - centrifugal atomization - drying - screening - quenching - spiral separation - grit crushing - tempering - final screening - packaging.
▸ Steel grit screen analysis includes common G series grades such as G10, G12, G14, G16, G18, G25, G40, G50, G80 and G120. Coarse grit is used for stronger rust removal and deeper profile; fine grit is used for smaller workpieces and finer surface control.
▸ In-house QC items include chemical composition, hardness, density, microstructure and durability. Testing equipment includes Ervin fatigue life tester, SPECTRO optical emission spectrometer, metallographic microscope, Vickers microhardness tester and carbon-sulfur analyzer.
▸ SGS pre-shipment inspection, MSDS, COA, sieve analysis and retained sample support can be arranged when required.
▸ GL Steel Grit is normally supplied in 25 kg PE/PP woven bags, 1000 kg FIBC jumbo bags, palletized bags, steel drums on request or customized export packaging. Bag marks can show the steel grit grade and size, such as GL / G40 / GL50, according to purchase requirements.
▸ Standard pallet packing is commonly 40 bags per pallet, about 1 MT per pallet. Typical 20'GP loading quantity is about 25-27 MT for steel shot or steel grit.
▸ Stock items are usually prepared within 7-15 days. Customized production or private-label packing may require about 20-30 days. Keep steel grit packages dry before use; batch labels and loading photos can be provided for traceability.
▸ Yes. GL is often selected as the mainstream grade because it balances cutting speed, durability and cost for many steel surface preparation jobs.
▸ GH is better when the workpiece has heavy rust, thick scale, aged coating or requires a deeper anchor profile.
▸ GP is more suitable when toughness, low breakage and economical operation are more important than aggressive cutting.
▸ GL18-GL40 are common mainstream choices for steel structures, tanks, pipes and general blasting work.
▸ Yes. GL is commonly used for ship profiles, plates, sections and marine steel components before coating.
Contact SEPPE for steel grit size selection, hardness grade, surface profile requirement, COA, samples, packaging and bulk order support.
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