Steel Grit Blasting Media
Steel Grit is an angular, carbon steel media designed for quick and effective removal of surface contaminants and coatings. Steel Grit is softer than other media and is less likely to fracture leaving an etched finish.
Steel Grit for Aggressive Surface Preparation
Steel Grit Blasting Media is an angular carbon-steel abrasive designed for fast removal of surface contaminants and coatings. Its angular shape provides strong cutting action and creates an etched surface that can improve adhesion for paint, epoxy, enamel, rubber, and other coatings.
Kramer Industries offers steel grit in different sizes and hardness levels for applications ranging from general cleaning to aggressive rust and scale removal. The appropriate grade depends on the substrate, contamination, required surface profile, and blasting equipment.
What Is Steel Grit Blasting Media Used For?
Steel Grit Blasting Media is primarily used for aggressive cleaning, surface preparation, descaling, and surface etching. The angular particles cut into contaminants and coatings rather than producing the peening effect associated with spherical steel shot.
When a defined etched profile is required before applying a protective or decorative coating, steel grit blasting provides the cutting action needed to prepare the surface. It can also be used for cleaning foundry metals and other durable substrates.
Benefits
- Extreme Durability
- Fast Cutting
- Very High Recyclability
- Magnetic
- Used in Both Wheel Blasting and Pneumatic (Air) Blasting
- Multiple Hardness Levels Available
- Suitable for Aggressive Cleaning and Surface Preparation
Blasting Applications
- Blast Cleaning
- Surface Preparation
- Descaling
- Surface Etching
- Hard Stone Cutting
Surface Preparation With Grit Blasting
In industrial grit blasting, angular steel particles are propelled against the surface to remove rust, scale, coatings, and other contaminants. The resulting profile can provide a suitable anchor pattern for subsequent paint, epoxy, enamel, rubber, or other coatings.
For demanding preparation work, grit blast media provides the cutting action needed to remove firmly bonded contamination while maintaining consistent performance through repeated use.
Choosing the Right Grit Size and Hardness
Steel grit is manufactured in various hardness levels, typically ranging from 40 to 65 HRC, and in different grit sizes for applications from gentle surface cleaning to intense rust and scale removal.
When selecting a grade, consider the substrate, coating thickness, desired surface profile, blasting pressure, equipment type, and production requirements. Larger or harder particles can provide more aggressive cleaning, while smaller grades can provide greater control over the resulting finish.
Kramer Industries can help identify an appropriate size and hardness based on the application requirements.
Steel Grit Blasting for Different Surfaces
Steel grit blasting is commonly performed on steel and other durable foundry metals. It is well suited to removing rust, mill scale, paint, and other firmly bonded contaminants before coating or further processing.
The abrasive should be matched to the substrate and required finish. Because steel grit is an iron-based abrasive, applications involving stainless steel, aluminum, or other surfaces where ferrous contamination is a concern may require a non-ferrous alternative.
Steel Grit as an Industrial Abrasive
As a steel grit blasting abrasive, this material provides fast cutting action and an etched surface profile. The angular structure allows the particles to cut through coatings and contaminants efficiently.
A steel grit blasting abrasive can be used in wheel blast machines, pressure blasting cabinets, and automated blasting systems that are designed to handle steel media.
Steel grit blast media can be recycled many times in suitable blasting systems. Its durability and recyclability can help reduce media consumption over repeated production cycles.
Reusability and Media Life
One of the advantages of Steel Grit Blasting Media is its durability and high recyclability. The particles are designed to withstand repeated impacts and can remain useful through many blasting cycles when properly recovered and maintained.
Actual media life depends on the grit grade, hardness, blasting pressure, equipment configuration, substrate, contamination, and recovery system. Recycled and remanufactured steel grit can also be used where appropriate to support economical blasting operations.
Kramer Industries can help evaluate the appropriate media grade when recyclability and repeated production use are important considerations.
Steel Grit Compared With Steel Shot
Steel grit and steel shot are both steel-based blasting abrasives, but their shapes produce different surface effects. Steel grit has an angular shape and provides more aggressive cutting and etching, while steel shot has a spherical shape and is generally used for cleaning, polishing, and peening.
The choice between the two depends on whether the process requires aggressive material removal and an etched profile or a smoother surface and peening effect.
Steel grit blast media is generally selected when stronger cutting action is required, while steel shot is better suited to applications where a rounded impact and smoother finish are preferred.
Considerations When Using Steel Grit
Steel grit is dense and durable, which provides strong impact during blasting but also requires appropriately configured equipment. The selected size, hardness, operating pressure, and recovery system can all influence performance.
For enclosed wheel-blast or recovery systems, the high recyclability of the material can make it suitable for repeated production use. The correct grade and equipment settings should always be selected according to the application.
Specifications
Steel Grit Sizes and Finishes |
||
|---|---|---|
Grit Size |
Approximate Size |
Finish Produced |
| G-14 | 0.055″ | Deep etch rough |
| G-16 | 0.046″ | |
| G-18 | 0.039″ | |
| G-25 | 0.023″ | Sharp etch |
| G-32 | 0.021″ | |
| G-40 | 0.017″ | Medium etch |
| G-50 | 0.011″ | |
| G-80 | 0.007″ | |
Steel Grit Specifications |
|
|---|---|
Size |
All material is screened to meet or exceed SAE and SFS specifications. |
Chemistry |
Carbon: > 0.80% (depends on hardness) Sulfur: < 0.05% Phosphorous: < 0.05% |
Minimum Density |
7.3 g/cc (445 lbs/ft3) |
Bulk Density |
230 – 260 lbs/ft3 |
Hardness Available |
GP: 40-51 HRC GB: 47-56 HRC GL: 54-61 HRC GH: 60+ HRC |
Spec Sheet |
|
Frequently Asked Questions
Q1. What is grit in blasting?
Grit in blasting refers to abrasive particles used to remove contaminants, coatings, rust, scale, or other unwanted material from a surface. Particle size, shape, hardness, and material determine how aggressively the abrasive cuts and what type of surface profile it produces.
Q2. What surfaces can be grit blasted?
Grit blasting can be used on durable surfaces such as steel, iron, and other compatible foundry metals. Steel grit is particularly suited to applications requiring aggressive cleaning, descaling, or surface etching.
Q3. Is grit blasting the same as shot blasting?
No. Grit blasting generally uses angular particles that cut and etch the surface, while shot blasting uses spherical particles that primarily clean, peen, or polish the surface. The difference in particle shape produces different surface effects.
Q4. Can steel grit be reused?
Yes. Steel grit can be recovered and reused many times in suitable blasting systems. Its service life depends on the grade, hardness, operating conditions, recovery system, and level of particle breakdown.
Q5. What is the difference between steel grit and other abrasive media?
Steel grit provides aggressive cutting, high durability, and repeated recyclability. Compared with softer or non-metallic media, it is particularly suited to heavy-duty cleaning and surface preparation where an etched profile is required.
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