MORUNDUM™ Overview
Resonac (formerly 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 Resonac is controlled with a consistent system from coarse particle material. Fine powder abrasives require quality control tracing to materials, and for their quality stability, it is important to use high-quality materials. 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) |
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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) |
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) |
Macro and Micro Grits Size Distribution Chart
Download PDF – Macrogrits
Download PDF – Microgrits
Applications
List of applications of alumina abrasive grains and silicon carbide abrasive grains by product name.
Alumina Abrasive Grains
Product Name | Characteristics | Application |
---|---|---|
A-40 | Standard brown fused alumina. Very little iron content. Mainly for vitrified bonded grinding wheels. | Grinding wheels, coated abrasives, refractories |
A-43 | Standard brown fused alumina. Mainly for resinoid bonded grinding wheels and abrasive blasting. | Grinding wheels, coated abrasives, abrasive blasting |
A-47 | Having a sharp edge and friable characteristic, is suited for softer abrasive wheels. | Precision grinding wheels |
WA | High-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 |
SA | Single-crystal type abrasive grain, suited for hard materials. | Grinding wheels, coated abrasives, abrasive blasting |
PW | Pink in color, and is an improved version of the WA type. Longer lasting. | Grinding wheels, coated abrasives |
SM | Having compact structure, a very tough brown sintered alumina abrasive. | Grinding wheels, barrel |
SR | Having compact structure, a tough sintered high-purity white alumina abrasive. | Grinding wheels, barrel |
Silicon Carbide Abrasive Grains
Product Name | Characteristics | Application |
---|---|---|
C | Standard black silicon carbide abrasive | Grinding wheels, coated abrasives, abrasive blasting, refractories |
C-25 | Black silicon carbide abrasive with a sharp edge | Coated abrasives |
GC | High-purity green silicon carbide abrasive | Grinding wheels, refractories |
Typical Properties
List of typical properties of alumina abrasive grains and silicon carbide abrasive grains by product name.
Alumina Abrasive Grains
Name | Product name | Al203 (wt%) |
SiO2 (wt%) |
Fe2O3 (wt%) |
TiO2 (wt%) |
Toughness | Knoop Hardness | Bulk Density | Characteristics |
---|---|---|---|---|---|---|---|---|---|
Morundum™ | A-40 | 96.5 | 0.5 | 0.1 | 2.3 | Regular | 2020 | Mid | Brown fused alumina abrasive |
Morundum™ | A-43 | 96.5 | 0.5 | 0.2 | 2.3 | Regular | 2020 | Mid | Brown fused alumina abrasive |
Morundum™ | A-47 | 96.5 | 0.5 | 0.1 | 2.3 | Friable | 2020 | Low | Brown fused alumina abrasive |
White Morundum™ | WA | 99.6 | 0.02 | 0.03 | Trace | Tough | 2050 | Mid | High-purity white fused alumina abrasive |
Single Morundum™ | SA | 99.6 | 0.03 | 0.03 | 0.3 | Friable | 2250 | Low | Single-crystal type alumina abrasive |
Pink Morundum™ | PW | 99.3 | 0.07 | 0.04 | 0.3 | Regular | 2100 | Mid | Fused alumina abrasive |
Sinter Morundum™ | SM | 88.0 | 3.3 | 4.8 | 3.4 | Tough | 1250 | – | Sintered alumina abrasive |
Sinter Morundum™ | SR | 99.2 | 0.2 | 0.1 | – | Tough | 2000 | – | Sintered alumina abrasive |
Silicon Carbide Abrasive Grains
Name | Product name | Al203 (wt%) |
SiO2 (wt%) |
Fe2O3 (wt%) |
TiO2 (wt%) |
Toughness | Knoop Hardness | Bulk Density | Characteristics |
---|---|---|---|---|---|---|---|---|---|
Densic™ | C | 98.7 | 0.2 | 0.5 | 0.2 | Regular | 2700 | Mid | Black silicon carbide abrasive |
Densic™ | C-25 | 98.0 | 0.3 | 0.8 | 0.3 | Friable | 2700 | Mid | Black silicon carbide abrasive |
Green Densic™ | GC | 99.3 | 0.2 | 0.2 | 0.02 | Regular | – | – | – |
Packaging unit: 20kg paper bag, bulk bag