Aluminum Oxide (Al₂O₃) Blasting Consumable

Product Description

Aluminum oxide (Al₂O₃) is an abrasive belonging to the electro-corundum group, produced by melting calcined bauxite (Brown) or clay (White) in electric arc furnaces. It is iron-free, hard, and extremely stable. It is also known in the market by names such as "corundum, alumina."

Brown Aluminum Oxide (NK): Produced from calcined bauxite, it is an economical and durable general-purpose abrasive.

White Aluminum Oxide (EK): Produced by melting clay, it has premium purity (Al2O3 >99.7%) and high hardness; it is preferred in high-tech applications such as medical, aerospace, and optics, with fine grain sizes down to 3 microns.

Pink Aluminum Oxide: Thanks to its chromium oxide (Cr2O3) content, it has both a hard and tough (durable) structure; it is used as a reusable abrasive and in the manufacture of coated/bonded abrasives (sandpaper). It complies with CSS12 (Rolls-Royce) approval, FEPA F/P, EN ISO 11126-7, DIN ISO 8486-1, MIL A-A-59316, ANSI B74-12, and JIS R6001 standards.

All 3 types are used in abrasive products such as grinding wheels, blasting media, and sandpaper; they can be applied in pressure blasting and injection blasting equipment.

Physical Properties:

Property	Brown (NK)	White (EK)	Pink
Hardness	9 Mohs	9 Mohs	9 Mohs
Grain Structure	Angular	Angular	Angular
Specific Gravity	~3.9-4.1 g/cm³	~3.9-4.1 g/cm³	~3.9-4.1 g/cm³
Bulk Density (by grain size)	~1.5-2.1 g/cm³	~1.4-2.1 g/cm³	~1.3-2.0 g/cm³
Melting Point	~1950°C	~2050°C	~2050°C

Chemical Properties:

Component	Brown (NK)	White (EK)	Pink
Al2O3	95.65%	99.73%	99.30%
TiO2	2.42%	0.02%	—
Fe2O3	0.12%	0.03%	0.05%
SiO2	0.92%	0.01%	—
CaO	0.35%	0.02%	0.05%
MgO	0.22%	0.01%	—
Na2O	—	0.14%	0.30%
Cr2O3	—	—	0.30% (source of color/durability)

Size Ranges (FEPA F Codes — common to all 3 types):

Code	Range (µm)
F008	2000-2800
F010	1700-2360
F012	1400-2000
F014	1180-1700
F016	1000-1400
F020	850-1180
F022	710-1000
F024	600-850
F030	500-710
F036	425-600
F040	355-500
F046	300-425
F054	250-355
F060	212-300
F070	180-250
F080	150-212
F090	125-180
F100	106-150
F120	90-125
F150	63-106
F180	53-90 (Brown/White), 63-90 (Pink)
F220	45-75 (Brown/White), 53-75 (Pink)

Metric (mm) — Brown/White: 0.06-0.12 / 0.12-0.25 / 0.25-0.50 / 0.50-1.00 / 1.00-2.00 / 1.00-3.00. White is also available in 0.25-0.50 and 0.50-1.00mm. Other grain sizes can be produced upon request. Packaging: 25 kg bags on a pallet (1 ton), or in a 1-ton Big Bag (for all 3 types).