Aluminium Oxide

Aluminium Oxide Abrasive — Industrial Grades for Blasting, Grinding and Surface Finishing

Aluminium oxide is one of the hardest and most versatile abrasive materials used in industrial surface preparation, precision grinding, and finishing. At 9 on the Mohs hardness scale, it cuts through rust, scale, old coatings, and hard substrates faster than most alternatives — and it does this consistently across thousands of blast cycles.

Vands Engineering Solutions has supplied aluminium oxide abrasive to Indian industry since 2013. We stock brown aluminium oxide and white aluminium oxide in grit sizes from 16 to 220, ready for dispatch from our New Delhi facility to customers across India and international markets.

If you run blast cabinets, tumble finishing machines, or bench grinders, and you need a sharp, fast-cutting abrasive that holds its profile through multiple reuse cycles, this is the product page for you.

What Is Aluminium Oxide Abrasive?

Aluminium oxide abrasive is a synthetic mineral compound made by fusing bauxite ore in an electric arc furnace at temperatures above 2,000°C. The result is a dense, hard, angular particle that cuts aggressively on contact with metal, ceramic, stone, or composite surfaces.

The technical name is aluminium oxide (Al₂O₃), also written as aluminum oxide. It is sold under several trade names — corundum, aloxide, and alox — but they all refer to the same base material. Two main grades dominate industrial use: brown aluminium oxide and white aluminium oxide. Both are hard, but they differ in purity, friability, and the applications they suit best.

Brown aluminium oxide contains titanium oxide as a minor component, which makes the particle tough and less brittle. It is the workhorse grade — used for heavy blasting, grinding wheel production, coated abrasives, and refractory linings. White aluminium oxide is purer (99%+ Al₂O₃), friable, and self-sharpening. It is used for precision grinding, optical glass polishing, semiconductor wafer processing, and applications where contamination from trace metals is not acceptable.

Both grades are free of crystalline silica, making them safe for operators compared to silica sand. No special respiratory PPE is required beyond standard particulate masks for normal blast and grind operations.

Aluminium Oxide Grades We Supply — Brown and White

Vands stocks both brown and white aluminium oxide in standard FEPA grit sizes. Here is what each grade covers and who typically uses it.

Brown Aluminium Oxide (BAO)

Brown aluminium oxide is the standard industrial grade. It has a hardness of 9 Mohs and an Al₂O₃ content of 95–97%, with the remainder being titanium oxide (TiO₂) and minor oxides. The titanium content adds toughness, which means the particle resists fracture during impact and gives more cutting cycles before breakdown.

We supply brown aluminium oxide in grit sizes 16, 24, 36, 46, 60, 80, 120, 180, and 220. Coarser grits (16–46) are used in blasting cabinets for aggressive surface preparation on steel, aluminum, and titanium components. Medium grits (60–120) are used in grinding wheels, coated abrasive belts, and surface conditioning. Fine grits (150–220) go into lapping, polishing, and final finishing operations.

Bulk density runs between 1.6 and 1.9 g/cm³ depending on grit size. Melting point is 2,050°C, which makes brown aluminium oxide suitable for refractory and kiln furniture applications as well.

White Aluminium Oxide (WAO)

White aluminium oxide is the high-purity grade. Al₂O₃ content is 99%+ with minimal iron and titanium. The higher purity makes the particle friable — it fractures more easily under impact, constantly exposing fresh, sharp cutting edges. This property is what makes white aluminium oxide the preferred choice for precision grinding and sensitive surface finishing.

We supply white aluminium oxide in grit sizes 46, 60, 80, 120, 150, 180, 220, and finer grades on request. It is used in grinding wheels for high-speed tool steel and stainless steel, lapping compounds for optical glass, and surface treatment of aerospace components where iron contamination from brown grades is not acceptable.

White aluminium oxide is also the blasting media of choice in dental laboratories, jewellery finishing, and electronics cleaning — anywhere that demands a clean, pure media with no trace mineral contamination.

How Aluminium Oxide Is Used in Industrial Applications

Aluminium oxide works across a wider range of applications than almost any other abrasive. The same base material, in different grit sizes and grades, handles tasks from rough blast cleaning to final optical polishing.

Surface Preparation and Blast Cleaning

In blast cabinet operations, aluminium oxide at 36–80 grit removes rust, scale, paint, and oxide layers from steel, stainless steel, aluminum, brass, and titanium parts. It creates a sharp, angular anchor profile that gives paint, powder coat, thermal spray, and adhesive bonding an excellent surface to grip. The achievable surface profile ranges from Ra 1.5 µm with fine grits to Ra 6.5 µm with coarse grits on carbon steel.

Because aluminium oxide is recyclable in enclosed blast systems, running costs are substantially lower than with single-use copper slag or mineral abrasives. In a well-maintained blast cabinet, brown aluminium oxide at 60–80 grit gives 4–6 reuse cycles before particle breakdown becomes significant.

Grinding and Cutting Wheel Production

Brown aluminium oxide is one of the two primary bonded abrasive grain materials (the other being silicon carbide). Grinding wheel manufacturers bond aluminium oxide grains with vitrified ceramic, resinoid, or rubber bonds to produce bench grinder wheels, angle grinder discs, and centreless grinding wheels.

Wheels made with brown aluminium oxide work best on high-tensile steel, tool steel, and hard alloys. White aluminium oxide wheels are chosen for stainless steel, high-speed steel (HSS), and titanium where the heat generated during grinding must be minimised to prevent workpiece damage.

Coated Abrasives — Belts, Discs, and Sheets

Aluminium oxide grain is the most common abrasive in sanding belts, flap discs, fibre discs, and abrasive sheets. For steel and wood, brown aluminium oxide in 40–120 grit gives fast stock removal. For finishing passes, 150–220 grit gives a smooth, consistent surface.

Coated abrasive manufacturers source aluminium oxide grain from us for application onto cloth, paper, and film backings. If you produce coated abrasives and need consistent grain sizing and hardness batch to batch, contact our sales team.

Lapping and Polishing Compounds

Fine white aluminium oxide powder at 240, 320, 400, 600, and 1200 grit is used in lapping compounds, polishing pastes, and slurry for optical glass grinding, semiconductor wafer finishing, ceramic surface preparation, and gauge lapping in precision engineering.

At these fine particle sizes, aluminium oxide removes metal in micron-level increments, allowing flatness tolerances of less than 1 µm on precision surfaces. Tool rooms, calibration labs, and optical manufacturers use it as a standard consumable.

Refractory and Ceramic Applications

High-purity aluminium oxide at coarse mesh sizes is used as a raw material in refractory castables, kiln furniture, and advanced ceramics. Its melting point of 2,050°C and chemical inertness make it stable in high-temperature furnace linings, crucibles, and kiln shelves. Vands supplies coarse refractory-grade aluminium oxide on request for kilns and high-temperature process industries.

Aluminium Oxide vs Other Abrasives — Which One Is Right for You?

The right abrasive depends on what you are processing, what surface condition you need, and how much the media costs per usable cycle. Aluminium oxide is not always the cheapest option per kilogram, but it is often the cheapest option per square metre treated or per part processed — because it lasts longer and cuts more consistently than mineral alternatives.

Compared to garnet, aluminium oxide is harder (9 Mohs vs 7.5–8 Mohs) and cuts faster on hard metals. Garnet is preferred for mild steel pipeline work and waterjet cutting where a silica-free mineral media is specified. Aluminium oxide is the better choice for non-ferrous metals, precision components, and any application where the surface profile needs fine control.

Compared to steel grit, aluminium oxide is harder but lighter. Steel grit has a much higher mass per particle and creates deep anchor profiles on heavy steel structures. Aluminium oxide suits enclosed cabinet blasting on smaller, precision components where steel contamination of the base material is a concern.

Compared to silicon carbide, aluminium oxide is tougher but less hard. Silicon carbide at 9.5 Mohs is harder and cuts faster on carbides, ceramics, and glass. But silicon carbide fractures quickly and is not recyclable in the same way aluminium oxide is. For most metal surface preparation tasks, aluminium oxide gives a better cost-per-cycle outcome.

Compared to copper slag, aluminium oxide costs more per kilogram but far less per square metre when recycled. Copper slag is single-use. Aluminium oxide in a closed blast cabinet gives 4–6 cycles. On any high-volume production blast operation with a cabinet or chamber, the switch from copper slag to aluminium oxide typically pays back in 3–6 months.

Grit Size Guide — What Each Grade Does

Grit size is the single most important variable after abrasive type. Choosing the wrong grit wastes time and money on both ends — too coarse leaves a surface that is hard to finish cleanly, too fine slows cut rate and raises operating time per part.

Grit 16 to 24 is coarse. It removes heavy scale, thick paint, weld spatter, and deep pitting fast. The surface left behind is rough, which suits thermal spray coatings, heavy-duty epoxy systems, or applications that need maximum mechanical adhesion.

Grit 36 to 60 is medium. It handles standard surface preparation for paint and powder coat, removes light rust and mill scale efficiently, and creates a consistent anchor profile. This range covers the bulk of blast cabinet work in fabrication shops.

Grit 80 to 120 is fine. It produces a smooth, bright surface with a lower profile, suitable for anodising preparation on aluminum, pre-plating cleaning, and surface conditioning before precision coating.

Grit 150 to 220 is very fine. It is used for final finishing passes, deburring, and pre-polish preparation on components that need a visual finish. At 220 grit, aluminium oxide leaves a surface close to a dull polish on stainless steel.

Grits above 220 — 320, 400, 600, and beyond — move into lapping and polishing territory. These ultra-fine powders are used in slurry applications, not dry blasting. White aluminium oxide in these sizes is the standard choice for optical and precision engineering lapping.

If you are unsure which grit matches your blast pressure, nozzle size, and target surface profile, call our technical team. We will specify it based on your equipment and substrate.

Packing, Order Quantities, and Dispatch

We supply aluminium oxide in formats that suit both small workshops and large production facilities.

Standard packing is 25 kg in sealed PP woven bags. For bulk production operations, we supply in 50 kg jumbo bags or loose bulk for direct silo or hopper loading. Each bag is clearly labelled with grade (brown or white), grit size, batch number, and material standard reference.

Trial and sample orders start from 50 kg. Standard commercial orders run from 500 kg upward. Bulk pricing applies to orders above 2 MT. We quote ex-works New Delhi with delivery to all major Indian cities — Mumbai, Chennai, Pune, Hyderabad, Ahmedabad, Kolkata, Bengaluru, and Surat. Export orders to the Middle East, Southeast Asia, and Africa are handled from the same facility.

Dispatch on stock grades is same day to 48 hours from order confirmation. Non-stock sizes or custom specifications require 7–14 working days.

Every shipment comes with a material test certificate confirming Al₂O₃ content, grit size distribution, bulk density, and hardness. An MSDS is included with every order as standard.

Why Buy Aluminium Oxide from Vands Engineering Solutions?

We have been in the blasting and abrasive business since 2013. That means eleven years of specification experience, customer projects, and technical problem-solving behind every order.

We know how aluminium oxide performs in different blast machines because we manufacture blast cabinets, blast rooms, and blasting nozzles ourselves. We see how the abrasive interacts with equipment, what grit sizes suit which nozzle diameters, and what blast pressure settings give the best cut rate without excess media breakdown. That knowledge comes with every purchase — not as a paid consultation, but as part of how we do business.

Our quality control is straightforward. Every batch is sieve-tested against FEPA P and FEPA F standards before it leaves stock. If a shipment does not match the stated specification, we replace it. No back-and-forth, no rejection process.

We serve customers who cannot afford downtime. Fabrication shops, aerospace subcontractors, and coating application companies have production schedules. Late or off-spec media stops the line. Our dispatch reliability and consistent batch quality are the reasons buyers stay with us.

Frequently Asked Questions About Aluminium Oxide Abrasive

What is aluminium oxide abrasive used for? Aluminium oxide abrasive is used across four main applications: blast cleaning and surface preparation in enclosed cabinets or blast chambers, production of grinding wheels and coated abrasive products, lapping and polishing of precision surfaces in tool rooms and optical manufacturing, and refractory and ceramic material production. The grit size determines the application — coarse grits for aggressive cleaning, fine grits for finishing, and ultra-fine powders for lapping.

What is the difference between brown and white aluminium oxide? Brown aluminium oxide has 95–97% Al₂O₃ content and includes titanium oxide, which makes it tough and wear-resistant. It is the general-purpose grade for blasting, grinding, and heavy surface preparation. White aluminium oxide has 99%+ Al₂O₃ purity with no titanium, making it friable and self-sharpening. It is used for precision grinding of stainless steel and tool steel, optical polishing, semiconductor processing, and any application where metal contamination from brown grades is unacceptable.

How many times can aluminium oxide abrasive be reused? In an enclosed blast cabinet with a good separator and dust collector, brown aluminium oxide typically gives 4–6 blast cycles before particle breakdown reduces cut efficiency. Finer grits break down faster than coarser ones because the particles are smaller to begin with. The key factor is how well the separator removes broken fines — a well-maintained cabinet keeps media quality higher for longer. Compared to single-use media like copper slag, aluminium oxide in a recirculating system significantly reduces media cost per part processed.

What grit size of aluminium oxide should I use for blasting steel before powder coating? For powder coat adhesion on carbon or mild steel, 60–80 grit brown aluminium oxide is the standard starting point. It creates a surface profile of approximately Ra 2–4 µm, which gives powder coat a good anchor without excessive roughness. For thin sheet steel where you want a cleaner, more controlled profile, 80–120 grit is the better choice. For heavy structural steel or castings, 36–60 grit gives the depth of profile that high-build powder systems need.

Is aluminium oxide abrasive safe for operators? Yes. Aluminium oxide contains no crystalline silica, which is the primary respiratory hazard in mineral abrasives like silica sand. It is classified as a nuisance dust under OSHA and most national safety standards. Standard particulate dust masks (FFP2 or equivalent) are sufficient for most blast and grind operations. This is why aluminium oxide replaced silica sand in blast cabinet operations — it delivers equivalent or better performance without the silicosis risk.

What documentation does Vands provide with aluminium oxide orders? Every order ships with a material test certificate confirming Al₂O₃ content by percentage, bulk density, grit size distribution against FEPA P or FEPA F standard, and Mohs hardness reference. A Material Safety Data Sheet (MSDS/SDS) is included as standard. For export orders, we provide a certificate of origin and commercial invoice with HS code. On request, we can provide third-party test reports for quality-critical applications in aerospace or defence supply chains.

Can I use aluminium oxide in a pressure blaster or suction blast gun? Yes, aluminium oxide works in both pressure blast systems and suction-feed (siphon) blast guns. Pressure blasters with 40–100 PSI operating pressure suit coarser grits (24–80) for aggressive surface preparation. Suction blast guns are better suited to medium and fine grits (60–120) where blast pressure is lower. For fine grit lapping applications, aluminium oxide is used in slurry form, not dry blasting. Contact our technical team with your equipment model — we will confirm the right grit range and feed setting.

Contact Vands Engineering Solutions — Order Aluminium Oxide Today At Best Price in Delhi

Vands Engineering Solutions New Delhi, India Manufacturer, Exporter and Importer of Industrial Blasting Equipment and Abrasive Media since 2013. Vands Engineering Solutions supplies industrial-grade aluminium oxide abrasive in brown and white variants, available from 16 grit to 220 grit. Established in 2013 and headquartered in New Delhi, we serve fabricators, aerospace units, foundries, tool rooms, and surface finishing plants across India and 5+ export markets.

Aluminium oxide is the hardest synthetic blasting and grinding abrasive widely available — rated 9 on the Mohs scale. It cuts fast, holds its shape through multiple blast cycles, and works on steel, aluminum, titanium, ceramics, and composite materials. Our grades meet FEPA (Federation of European Producers of Abrasives) standards and come with full material test certificates and MSDS documentation.

Whether you need 50 kg for a trial or bulk container loads for continuous production, Vands dispatches from New Delhi with same-day processing on stock items. Call our technical team for grade selection support.