Home :: Black Silicon Carbide Powder Technical Specs

Black Silicon Carbide Powder Technical Specs

SiC Powders are specifically manufactured to be used for general abrasive applications in bonded abrasive tools, lapping and polishing processes. With a lower hardness and abrasive capacity than diamond or boron carbide, it is widely used for grinding nonferrous materials, finishing tough and hard materials, as well as filling up ceramic parts due to its lower cost. 

Sizes Available: Grit sizes range from coarse grades down to a 1500 mesh size.

Note: We do not sell silicon carbide disks or forms other than the actual loose sandblasting abrasive grits and powders.

Technical data

Application Grade Grit Size SIC
mass % - min.
Fe(Iron)
mass % - max
C(Carbon)
mass % -max
Magnetic admixture
mass %- max
Abrasive AG F12-F20 AG 0.3 0.3 0.13









 
F24-F90 98.0 0.3 0.3 0.2
F100-F120 97.0 0.4 0.4 0.2
F150-F180 98.0 0.5 0.4 0.2
F230-F280 98.0 0.4 0.4 0.2
F320-F600 98.0 0.5 0.5 0.2
F800-F1000 95.0 0.7 0.6 0.2
F1200 92.0 0.9 0.7 0.2

Application Grade Grit Size SIC mass %-
min.
Free C (Carbon) mass %
mass % -range
Total C (Carbon) mass
% - range
S (Sulfur) mass % -
range
moisture mass %
- range
Metallurgical MG 0-20mm 88-92 3-6 30-33 0.1-0.2 1-3

Physical data
Structure :   Monocrystalline
Particle shape :   Blocky, sharp edged
Color :   Black
Friability :   Semi-friable
Knoop hardness (100 scale) :   2480
Bulk density :   ANSI B74.12-1988
Specific gravity :   3.20

Particle size distribution for available grits.
Grading: FEPA Standard

Grit size 3% max.,
larger than,
um
50% min.,
in size range,
um
94% min.,
larger than,
um
Grit size 3% max.,
larger than,
um
50% min.,
in size range,
um
94% min.,
larger than,
um
F12 2000 N/A 1400 F120 125 N/A 90
F14 1700 N/A 1180 F150 106 N/A 63
F16 1400 N/A 1000 F180 90 N/A 53
F20 1180 N/A 850 F220 75 50.0-56.0 45
F24 850 N/A 600 F240 70 42.5-46.5 28
F30 710 N/A 500 F280 59 35.0-38.0 22
F36 600 N/A 425 F320 49 27.7-30.7 16.5
F40 500 N/A 355 F360 40 21.3-24.3 12
F46 425 N/A 300 F400 32 16.3-18.3 8
F54 355 N/A 250 F500 25 11.8-13.8 5
F60 300 N/A 212 F600 19 8.3-10.3 3
F70 250 N/A 180 F800 14 5.5-7.5 2
F80 212 N/A 150 F1000 10 3.7-5.3 1
F90 180 N/A 125 F1200 7 2.5-3.5 1
F100 150 N/A 106  
Note: JIS and P Standard graded powder is available on request
 

Green Vs Black - What's the difference? 

Black SiC is a man made mineral with a high thermal conductivity rating of 100 W/m-K. It is extremely hard, around a Mohs 9.1 or 2550 Knoop. It has high strength at elevated temperatures. For example, at 1000oC, SiC is 7.5 times stronger than Al203 (aluminum oxide). Black SiC will contain some free silicon and carbon and thus is not as pure as green SiC. Black will range in purity from 97-99% pure, depending on grit size. Green SiC is made from Silica sand and coke, and is extremely pure. Hexagonally shaped, it breaks into very sharp particles. Our green SiC is 99.5% pure, exceeding JIS, ISO, & FEPA standards.

Green SiC is harder than black, coming in at a 9.4 Mohs and 2600 on the Knoop scale. Green is often the media of choice when it comes wire sawing. The micronization process of manufacturing our green SiC is controlled by a computer. Then the material is water classified/separated - this produces a very tight particle size distribution, as well as a reduction in fines, as preferred for accurate wire sawing applications. Unless your application requires an extremely pure SiC, by default, black is preferred due to its more economic pricing.