Steel Grit
ingritech
26.04.2025

Broken Steel Grit (Steel Grit SAE J444) — Key to Effective Surface Preparation

In the industrial sector, the quality of surface preparation directly impacts the durability of protective coatings and the reliability of structures. One of the key materials for effective surface treatment is broken steel grit (Steel Grit SAE J444). In this article, we present its advantages, types, typical areas of application, and practical tips for selecting the right material.

What is Broken Steel Grit (Steel Grit SAE J444)?

Broken steel grit is an abrasive material made from high-carbon steel, produced by crushing and heat-treating steel particles. The SAE J444 standard defines the quality parameters, ensuring stability and high efficiency in surface treatment processes.

Thanks to its sharp edges, the grit effectively removes contaminants, rust, and scale, preparing the surface for further processes such as painting, metallization, or applying protective coatings.

Key Features and Types of Steel Grit

Grit Type Hardness Typical Application
GH (High Hardness) ≥ 64 HRC Removal of persistent contaminants, heavy cleaning
GL (Long Life) 56–60 HRC Optimal balance between hardness and durability
GP (General Purpose) 50–55 HRC General surface cleaning and preparation
GS (Special) Special properties Tailored solutions for individual requirements

Typical Grit Fractions and Their Applications

Fraction Diameter [mm] Typical Application Surface Profile Cleaning Efficiency
G14 1.40–2.00 Heavy scale and rust removal High Very High
G18 1.00–1.40 Steel structure cleaning, preparation for painting Medium-High High
G25 0.71–1.00 General surface cleaning and preparation Medium Medium-High
G40 0.42–0.71 Precise cleaning of delicate surfaces Low-Medium Medium
G50 0.30–0.42 Detailed cleaning of thin elements Low Medium
G80 0.18–0.30 Very delicate surface treatment, fine cleaning Very Low Medium-Low

Key Advantages of Using Broken Steel Grit

  • High cleaning efficiency, even for difficult surfaces.

  • Creates an optimal surface profile, ensuring better adhesion of coatings.

  • Multiple uses, significantly reducing costs.

  • Wide range of applications across various industries.

Typical Areas of Application

  • Shot blasting of steel structures

  • Surface preparation before painting or metalizing

  • Removal of rust, scale, and old coatings

  • Processing of parts in the machine, shipbuilding, aerospace, and energy industries

What to Consider When Choosing Steel Grit?

  • Grain size – affects the depth and character of the surface profile.

  • Material hardness – determines the intensity of cleaning.

  • Surface type – material, contamination level, required final effect.

  • Equipment parameters – compatibility of grit with blasting equipment.

Tips for Optimizing Costs and Quality

  • Use only certified grit compliant with SAE J444.

  • Regularly clean and recover abrasives.

  • Properly adjust equipment settings for optimal performance.

  • Monitor grit consumption and replace it based on actual condition.

Why Choose INGRITECH?

  • Guaranteed quality compliant with SAE J444.

  • Expert advice on selecting the right type and fraction of grit.

  • Fast deliveries across Europe and Poland.

  • Comprehensive solutions for effective and cost-efficient surface preparation.

Summary

Broken steel grit (Steel Grit) is a crucial material for high-quality surface preparation.
Choosing the right type of grit and a trusted supplier directly affects process efficiency and the durability of the final result.

👉 Contact INGRITECH for expert advice and the best solutions tailored to your needs!