Steel Grit

Premium Steel Grit for Heavy‑Duty Surface Treatment – Angular Abrasive Solutions for Industrial Blasting

Junda Machinery (Botou) manufactures high‑performance Steel Grit, engineered for aggressive surface cleaning and coating preparation in heavy‑industry applications. With over 20 years of expertise in foundry machinery and a 3,000‑square‑meter production facility, we supply angular metallic abrasives that deliver outstanding cutting power and controlled consumption. Our standard cast grit complies with SAE J444 standard and is available in 16 particle sizes ranging from 0.1–2.5 mm. Hardness grades include HRC45–55 (standard) and HRC58–65 (high‑alloy). Each particle achieves 1500‑3000 impact cycles with a consumption rate of 0.15‑0.4 kg/m². These sharp particles rapidly remove scale, welding slag and stubborn rust while generating a uniform anchor profile.

What Makes Steel Grit Critical for Industrial Surface Treatment

Steel Grit is a heat‑treated angular abrasive produced by crushing tempered steel shot. Its sharp edges deliver powerful cutting action to address key industrial challenges: removing heavy oxide layers, creating consistent surface profiles for coating adhesion, and lowering operating costs through reusability.

Unlike expendable mineral abrasives, this metallic media delivers fast cleaning speed with minimal dust generation. It is the preferred choice for closed‑loop blasting systems where surface purity and anchor‑pattern depth are non‑negotiable. The angular geometry enables penetration into intricate casting features and aggressive etching of heavily corroded steel structures.

Your production efficiency depends on selecting the correct abrasive. When tackling heavy scale on steel plates or tenacious sand residues on large castings, round‑shaped abrasives lack cutting force. Our products solves this by concentrating impact energy on sharp contact points, significantly accelerating material removal while maintaining repeatable surface roughness.

Technical Specifications

​​​​​​​Core Performance AdvantagesSharp Cutting Edges for Maximum Material Removal

Angular geometry concentrates kinetic energy across multiple contact points. This design quickly removes heavy scale, welding slag and aged coatings that round shot cannot tackle effectively. You achieve faster cleaning cycles and deeper surface etching to meet stringent pre‑treatment standards.

Comprehensive Size Selection for Precise Profile Control

Sixteen standard grain sizes allow precise control over surface roughness. Whether you require shallow anchor patterns for automotive coatings or aggressive profiles for marine anti‑corrosion systems, this size range fits all shot‑blasting equipment types and process requirements.

Balanced Toughness Reduces Consumable Costs

Our heat‑treated martensitic structure withstands repeated high‑velocity impacts. Under proper operating conditions, particles break down gradually and predictably. This controlled fragmentation extends recycling life, lowers abrasive replacement frequency and cuts waste‑handling volumes.

Consistent Texture Improves Coating Performance

Angular impact patterns create uniform micro‑roughness on treated surfaces. This mechanical anchoring greatly boosts adhesion of primers, epoxies and specialty coatings. You can reliably reach Sa2.0 to Sa2.5 cleanliness grades required by international coating specifications.

Main Industrial Applications

Heavy‑Duty Casting Desanding

Foundries use this abrasive to eliminate stubborn molding sand and core residues from complex castings. Sharp edges reach into grooves and undercuts where round‑shaped media fails, ensuring complete surface preparation prior to machining or assembly.

Steel Structure Anti‑Corrosion Preparation

Shipyards and bridge manufacturers rely on Steel Grit to remove heavy rust and generate optimal anchor profiles. Its aggressive cutting action prepares steel surfaces for long‑term protective coatings in marine and infrastructure environments.

Pipe Coating Pre‑Treatment

Large‑diameter pipe manufacturers integrate our products into centrifugal blasting systems. Consistent profile depth guarantees reliable adhesion of fusion‑bonded epoxy and polyethylene coatings, protecting buried pipelines for decades.

Offshore Platform Refurbishment

Maintenance contractors deploy this media to strip old epoxy systems and deep‑seated corrosion from steel structures. High cutting efficiency reduces downtime during critical offshore maintenance windows.

FAQ

Q: Why does the angular abrasive have a shorter service life than the spherical type?

A: Angular edges naturally round off and fracture under continuous impacts. Although this reduces recycling life compared with spherical media, it delivers substantially stronger cutting performance for heavy‑duty cleaning tasks where aggressive material removal is the priority.

Q: Which grain size is recommended for anti‑corrosion pre‑treatment?

A: Medium grades G25 and G40 consistently achieve Sa2.5 cleanliness and ideal roughness profiles for steel‑structure anti‑corrosion coatings. These sizes balance cleaning efficiency and controlled surface texture, suitable for most protective coating systems.

Q: Will the angular abrasive cause excessive damage to thin‑walled workpieces?

A: Pure angular media is too aggressive for steel sheets thinner than 3 mm. For thin substrates, mix it with round media to reduce cutting force, or switch to stainless steel media for milder impact while retaining cleaning performance.

Q: How many square meters can one ton of the angular abrasive process?

A: For lightly rusted steel surfaces, expect coverage of 2500‑6000 m² per ton. When removing heavy scale or multi‑layer coatings, processing capacity drops by roughly half due to increased abrasive consumption and breakage

Customization & Global Support

We provide ODM/OEM services tailored to your specific blasting requirements. Grain‑size distribution can be adjusted for special applications. Packaging options suit both manual handling and automatic feeding systems.

Our logistics network handles full‑container loads, LCL shipments and over‑sized cargo through established freight partnerships. All export shipments come with proper fumigation certificates and customs documentation. Standard grades ship from available stock, while custom Steel Grit specifications normally require a 15‑day production lead‑time.

Technical support includes remote installation guidance, operator training materials and English‑language maintenance documents. Inquiries are answered within 6‑8 hours to keep your project on schedule.

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Contact Us for Your Grit Solution

Ready to boost your surface‑treatment efficiency? Contact our technical team via junda001@jundablast.com to discuss your application requirements and get customized Steel Grit recommendations.