Morundum™ (Alumina)

Product Series - Automotive

Morundum™ (Alumina) Overview

Fine powder abrasives require quality control tracing to materials, and for their quality stability, it is important to use high-quality materials.

Showa Denko is one of the leading comprehensive manufacturers in Japan in the field of coarse-particle abrasive material, from which fine powder abrasive is made. The quality of fine powder abrasive provided by Showa Denko is controlled with a consistent system from coarse particle material. We develop various kinds of products as functional fine powder to meet user needs and requirements.

Product Lineup

A:A standard brown electro-fused-alumina abrasive. Generic fine powder, used for optical polishing, general lapping, grinding wheels, coated abrasives, etc.
(particle size: coarse, fine #220~#3000)
WA:A high-purity white electro-fused-alumina abrasive, suited for applications that must avoid heating. Used for general lapping, grinding wheels, fillers, refractories, etc. (particle size: coarse, fine #240~#8000)A single-crystal abrasive grain, suited for hard materials. In addition to a grade for general use, there are grades for resinoid bonded grinding wheels and coated abrasives.
SA:A single-crystal abrasive grain, suited for hard materials. In addition to a grade for general use, there are grades for resinoid bonded grinding wheels and coated abrasives.

PW:

A pink lavender color, improved WA, having a longer life span.
SM:Having compact structure, a very tough cylindrical brown sintered alumina abrasive.
SR:Having compact structure, a very tough cylindrical high-purity white sintered alumina abrasive. A non-fixed form grade, “SR-3” is also available.

C:

A black silicon carbide abrasive. Generic fine powder, used for general lapping, grinding wheels, coated abrasives, etc (particle size: coarse, fine #240~#4000)
GC:A high-purity green silicon carbide abrasive. Generic fine powder, used for general lapping, grinding wheels, cutting, fillers, etc. (particle size: coarse, fine #240~#8000)

Size distribution chart:

Download PDF – Macrogrits
Download PDF – Microgrits

Applications

Alumina Abrasive Grains

Product NameCharacteristicsApplication
A-40Standard brown fused alumina. Very little iron content. Mainly for vitrified bonded grinding wheels.Grinding wheels, coated abrasives, refractories
A-43Standard brown fused alumina. Mainly for resinoid bonded grinding wheels and abrasive blasting.Grinding wheels, coated abrasives, abrasive blasting
A-47Having a sharp edge and friable characteristic, is suited for softer abrasive wheels.Precision grinding wheels
WAHigh-purity white fused alumina abrasive, suited for applications that must avoid heating.Grinding wheels, coated abrasives, fillers in resin and coatings, electrically insulating material, refractories
SASingle-crystal type abrasive grain, suited for hard materials.Grinding wheels, coated abrasives, abrasive blasting
PWPink in color, and is an improved version of the WA type. Longer lasting.Grinding wheels, coated abrasives
SMHaving compact structure, a very tough brown sintered alumina abrasive.Grinding wheels, barrel
SRHaving compact structure, a tough sintered high-purity white alumina abrasive.Grinding wheels, barrel

Silicon Carbide Abrasive Grains

Product NameCharacteristicsApplication
CStandard black silicon carbide abrasiveGrinding wheels, coated abrasives, abrasive blasting, refractories
C-25Black silicon carbide abrasive with a sharp edgeCoated abrasives
GCHigh-purity green silicon carbide abrasiveGrinding wheels, refractories

Alumina Abrasive Grains / Typical Properties

NameProduct nameAl203
(wt%)
SiO2
(wt%)
Fe2O3
(wt%)
TiO2
(wt%)
ToughnessKnoop HardnessBulk DensityCharacteristics
Morundum™A-4096.50.50.12.3Regular2020MidBrown fused alumina abrasive
Morundum™A-4396.50.50.22.3Regular2020MidBrown fused alumina abrasive
Morundum™A-4796.50.50.12.3Friable2020LowBrown fused alumina abrasive
White Morundum™WA99.60.020.03TraceTough2050MidHigh-purity white fused alumina abrasive
Single MorundumSA99.60.030.030.3Friable2250LowSingle-crystal type alumina abrasive
Pink MorundumPW99.30.070.040.3Regular2100MidFused alumina abrasive
Sinter MorundumSM88.03.34.83.4Tough1250Sintered alumina abrasive
Sinter MorundumSR99.20.20.1Tough2000Sintered alumina abrasive

 

Silicon Carbide Abrasive Grains / Typical Properties

NameProduct nameAl203
(wt%)
SiO2
(wt%)
Fe2O3
(wt%)
TiO2
(wt%)
ToughnessKnoop HardnessBulk DensityCharacteristics
Densic™C98.70.20.50.2Regular2700MidBlack silicon carbide abrasive
Densic™C-2598.00.30.80.3Friable2700MidBlack silicon carbide abrasive
Green Densic™GC99.30.20.20.02Regular

Packaging unit: 20kg Paper bag, bulk bag

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