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Topics Covered
IntroductionDescription
of DURALUM®Applications of DURALUM®
Typical Chemical Analysis of DURALUM®
Grain
Sizes AvailablePowder Sizes Available
Typical Physical Properties of DURALUM®
Introduction
Washington
Mills manufactures fused aluminum oxide (Al2O3), otherwise known as fused
alumina, through an electric arc furnace process. Our brown fused alumina is
made into many shapes and grit sizes ranging from macrogrits to microgrits and
powders. Aluminum oxide is a tough, hard material (Mohs hardness 9) with high
strength, excellent wear and corrosion resistance and good thermal conductivity.
Fused alumina is widely used as a raw material in refractories, ceramics shapes,
grinding wheels, sandpaper, blasting media, metal preparation, laminates,
coatings, lapping, polishing, grinding and hundreds of other applications. Washington
Mills’ brown fused alumina grains and powders are available in standard grit
and powder sizes and they can also be made to individual specifications.
Description of DURALUM®
DURALUM®
is a tough, medium density, virgin, fused brown aluminum oxide (alumina) abrasive for use
in products and applications where a tough, strong, aluminum oxide is
required.
Applications of DURALUM®
DURALUM®
is the most versatile and widely used, medium density fused aluminum oxide
available. It is produced in a complete range of grit sizes for grinding wheel
manufacturing, coated abrasive products, grit blasting and other general
abrasive applications. DURALUM® is also available with a ceramic iron oxide
coating (DURALUM® REDKOTE) or a silane surface treatment (DURALUM® SILKOTE).
Typical Chemical Analysis of DURALUM®
Typical chemical analysis of DURALUM® is
given in the table below.
| TYPICAL CHEMICAL ANALYSIS |
| Chemical |
Composition |
| Al2O3 (by difference) |
96.12% |
| TiO2 |
2.70% |
| SiO2 |
0.67% |
| Fe2O3 |
0.11% |
| Other Oxides |
0.40% |
Grain Sizes Available
DURALUM® can be supplied in the following grit sizes:
8, 10, 12, 14, 16, 20, 24, 30, 36, 46, 54, 60, 70, 80, 90, 100, 120, 150,
180, and 220
Powder Sizes Available
DURALUM® powders are available in the following sizes:
240, 280, 320, 400, 500, 600, 800, 1000, 1200, F, FF, FFF
Specialty sizes
available upon request
Typical Physical Properties of DURALUM®
Typical physical properties of DURALUM®
are described in the following table.
| TYPICAL PHYSICAL PROPERTIES |
| Physical
Property |
Specification |
| Crystallography |
Alpha alumina, in the hexagonal crystal system |
| Color |
Brown |
| Specific Gravity |
3.92 |
| Knoop100 Hardness |
2090 |
| Shape |
Blocky, with sharp edges |
| Grading (Grain) |
ANSI B74.12-2001, Table 2 OR FEPA 42-1:2006 |
| Grading (Powder) |
ANSI B74.10-2001 OR FEPA 42-2:2006 |
| Magnetics |
ANSI B74.19-2002 (R2007) |
| Bulk Density (Grain) |
ANSI B74.4-1992 (R2007) |
Source: Washington Mills
For more information on this source, please visit Washington
Mills.