Aluminum Oxide Blasting Media Grit (Standard)
Aluminum oxide, recognized for its angular shape and durable properties, serves as a recycling-friendly abrasive media that can be utilized multiple times. This abrasive has become the preferred choice for sand blast finishing and surface preparation due to its economic efficiency, long lifespan, and exceptional hardness. The aluminum oxide grit powder is particularly effective in penetrating and cutting through even the toughest metals and sintered carbide.
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This abrasive is not only economical but also serves effectively in grinding and polishing tasks, making it an excellent choice for tumbling operations that demand rapid edge rounding, surface finishing, or cleaning.
Aluminum oxide blast media is approximately 50% lighter than traditional metallic media, resulting in double the number of particles per pound. The rapid cutting action it provides helps minimize damage to thin materials by reducing surface stresses commonly associated with heavier, slower cutting media.
Virgin brown aluminum oxide blasting media contains less than 1.5% free silica, making it a safer alternative compared to sand. The grit size remains consistent, cutting faster than sand while delivering a smoother finish. Typically, a larger grit size correlates with quicker cutting rates for aluminum oxide blast media.
White Fused Aluminum Oxide Sandblasting Abrasive
White fused aluminum oxide is a high-purity abrasive, ideally suited for applications where contamination is a concern. With a medium to high friability rating, it breaks down quickly compared to brown fused aluminum oxide, making it ideal for applications requiring minimal profile on the substrate. Finer grades are frequently used for polishing purposes. White fused aluminum oxide is produced through the fusion of high-purity calcined alumina in electric arc furnaces, resulting in a product characterized by high hardness, high purity, and sizable crystal size. All aluminum oxide abrasives that are not specifically mentioned otherwise comply with AA specifications as well as GE Aircraft Engine Specifications.
Use this page to order White Fused Aluminum Oxide Sandblasting Abrasives. Grades 240 and finer can be purchased in quantities as small as 25 lbs. For coarse grades up to 220, please click here. Repackaging/processing lead times are typically 1-3 business days.
Specs for White Fused Aluminum Oxide:
- Produced from reduction fusion of high-quality bauxites in electric arc furnaces
- Electroplating Grade
- Exceptional toughness: Hardness Rating of 9 on the Mohs scale
- Can be recycled several times
- High Friability - This property signifies that it will shatter upon impact and degrade quickly. This characteristic is advantageous for applications like glass etching or polishing, while maintaining the same hardness rating as brown fused aluminum oxide.
- Color: White
- Melting Temperature (C):
- Alpha macro crystal from trigonal class, hexagonal system.
- 99.4%+ Aluminum Oxide content
- All our blasting media products are new, not reclaimed.
- Recommended by OSHA as an alternative to silica sand.
- Best suited for vibratory tumblers, optimal on materials with hardness/toughness ratings of 5-8.
Understanding Friability: It refers to how easily a media shatters and degrades upon impact. This property differs from Hardness Rating. Although different sandblasting media may share the same hardness level, they can have varying friability ratings, which can be thought of as a measure of their durability.
- Brown Fused Aluminum Oxides: Characterized by low friability, allowing for slow degradation, and larger sizes can be recycled and reclaimed.
- White Fused Aluminum Oxides: Exhibits high friability without sacrificing its general hardness rating. It shatters quickly, causing less impact damage to the substrate.
- Submicron White Calcined Aluminum Oxide: Intended for fine optics polishing, available upon request. Not suitable for rock tumbling or low-tech uses.
- Sinterblast or Sintered Aluminum Oxide: Offers a medium friability, acting as a balance between brown and white fused types. It is often favored by powder coating companies due to its affordability. It's recommended to blast at 60 PSI with this media for optimal results.
Recommended Uses:
- Sandblasting
- Grinding and Cut Off Wheels
- Coated Abrasives
- Laminates
- Coatings (effective for anti-slip applications)
- Polishing and Lapping: Fine grades 400 and finer are often used in rock tumbling machines, frequently serving as lapidary polish with an average particle size of approximately ~3 microns, used particularly in step #4 of rotary rock tumblers and the final stage of vibratory polishing.
- Ceramic Shapes and Refractory Layouts
- Anti-Skid Flooring (coarse grits, e.g., 24)
- Surface Preparation
- Etching, Carving & Gouging: (coarse grits like a 36)
- Electroplating
- General Industrial Use
- Glass Etching
- Lapping
- Polishing - often the final stage in rock tumbling (specific grit)
Grade Sizing and Mil Profile - Approximate Values Only: These assessments are based on using a pressure blaster on hot-rolled steel with closely adhering mill scale at 90-100 psi. Anchor patterns can vary due to numerous factors, such as the hardness and type of steel, corrosion level, blast angle, and blast distance from the steel surface.
- 1 mil profile = 100 grit aluminum oxide
- 1.5 mil profile = 50 grit aluminum oxide
- 2 mil profile = 36 grit aluminum oxide
- 2.5 mil profile = 24 grit aluminum oxide
- 3 mil profile = 16 grit aluminum oxide
- 4 mil profile = 12 or 16 grit aluminum oxide
Shipping & Packaging Information:
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