Black Aluminum Oxide Special

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Description

GNPGraystar’s Black Aluminum Oxide is produced by fusing bauxite, iron oxide, and other elements in an arc-furnace. The resulting product has a moderate hardness, high toughness, high temperature resistance, good thermal stability, and excellent self-sharpening.

This material data has been provided by GNPGraystar Specialty Materials.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

Properties

General

PropertyValue

True particle density

3.5 g/cm³

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Mechanical

PropertyValueComment

Hardness, Knoop, HK2

2000 [-]

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Knoop (100)

2200 [-]

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Knoop (100)

Hardness, Mohs

9.0 [-]

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Thermal

PropertyValue

Melting point

2050.0 °C

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Chemical properties

PropertyValueComment

Aluminium

80 %

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min. Al₂O₃

Iron

4.0 - 8.0 %

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Fe₂O₃

Silicon

10

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max. SiO₂

Titanium

2.0 - 4.0 %

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TiO₂

Technological properties

Property
Application areas

GNPGraystar’s Black Aluminum Oxide, due to its thermal stability and low heat generation when polishing, is used to polish metal pieces, especially stainless steel, producing a high smooth finish with little surface discoloration. It is also used in resin bonded abrasives, blasting applications, as anti-skid surfacing material, abrasive belts, flap wheels, fiber wheels, and other polishing & lapping applications.

Color

Black

Crystal structure

Trigonal System

Other

Special Black Aluminum Oxide Sizing:

Grits: F46 - F240 (FEPA F: 42-2:2006)

Powders: F280-F1000 Grit (FEPA F: 42-2:2006)

Other Sizes are Available Upon Request