Iron Grit / Chilled Iron Grit / Iron Shot / Chilled Iron Shot

Iron Grit / Chilled Iron Grit | White cast iron angular abrasive, hardness 57-67 HRC (HV 650-800), ISO 11126-7 compliant. The most aggressive metal abrasive for heavy rust removal, thick coating stripping, surface profiling & stone processing. Most economical option, lowest unit price.

Iron grit is a cost-effective abrasive media made from high-quality cast iron, produced through a crushing process that yields angular, sharp-edged particles. Its high density and aggressive cutting action make it ideal for heavy-duty surface cleaning, rust removal, and surface profiling. Commonly used in foundries, shipbuilding, and heavy industrial applications.

Chilled iron shot is produced from high-quality cast iron through centrifugal atomization, resulting in spherical or near-spherical particles. Its rounded shape and uniform hardness provide excellent performance in applications requiring consistent, controlled surface treatment. Used together with iron grit, chilled iron shot delivers optimal surface preparation results across various process conditions.

Chemical Composition

Physical Properties

Size Distribution — Chilled Iron Shot

Minimum percentage of media between sizes shown varies from 60% to 100%, subject to particular grade. Full details on request.

Size Distribution — Chilled Iron Grit

Minimum percentage of media between sizes shown varies from 60% to 100%, subject to particular grade. Full details on request.

Chilled Iron Grit — Application Guide

Chilled iron grit is a white cast iron abrasive produced by crushing, featuring sharp angular edges and high hardness (HV 650~800). It is primarily used for aggressive blast cleaning, surface profiling, and stone processing, with additional niche uses in ballasting and radiation shielding. Applications fall into five major categories:

1. Steel Structure / Shipbuilding — Blast Cleaning & Rust Removal

1. Removal of mill scale, heavy rust, old paint, and anti-corrosion coatings from bridges, tower cranes, factory steel structures, ship hulls, storage tanks, and pipelines;
2. Surface profiling before painting, zinc spraying, or thermal spraying — produces uniform anchor profile that significantly improves paint and zinc coating adhesion, compliant with GB/T 18838.2 and international surface preparation standards;
3. First choice for open-air high-pressure blasting — cutting power far exceeds steel shot, ideal for heavily corroded workpieces.

2. Foundry, Forging & Heat Treatment — Descaling & Cleaning

1. Removal of molding sand, burnt-on sand, burrs and flash from castings (cast steel, cast iron, aluminum alloys);
2. Removal of high-temperature mill scale from forgings and hot-rolled steel;
3. Post-heat-treatment oxide removal for gears, springs, bearings, etc. — high cleaning efficiency with excellent recyclability.

3. Metal Component Surface Preparation

1. Surface roughening before electroplating, enameling, powder coating, or electrophoretic coating to enhance coating adhesion;
2. Deburring and removal of oil/oxide layers from construction machinery, automotive chassis, frames, wheel hubs, and stamped parts;
3. Surface strengthening and etching of molds, valves, and pipe fittings.

4. Stone Processing Industry

1. Auxiliary abrasive for granite block sawing;
2. Sandblasting of stone slabs for antique finish, brushed texture, and rough surface effects — replaces silica sand with lower dust and faster cutting.

5. Other Industrial / Niche Applications

1. High-density ballasting: ship ballast, fishing net weights, fitness equipment, machine counterweights, electrical ballast filling;
2. Radiation shielding aggregate: heavy concrete and protective wall density enhancement;
3. Wear-resistant flooring and refractory material additive for improved abrasion strength;
4. Abrasive etching: steel plate marking/engraving, metal surface texturing.

Suitable vs. Not Suitable