| Alumina | Boron Carbide | Cerium Oxide | Diamond Powder | Silicon Carbide | Walnut Shell |
The premium, virgin
grain Silicon Carbide Powder that Greenhill stocks and distributes
is available in two colors; black and green. The Black Silicon Carbide
powder is a semi-friable, medium density abrasive that is primarily
used for gear lapping, flat lapping of metals and ceramics, as well
as blasting, glass grinding and granite polishing. The high-purity,
semi-friable, virgin Green Silicon Carbide has a special surface chemical
treatment to ensure low levels of surface impurities. This premium
Green Silicon Carbide is primarily used for pressure blasting, lapping,
grinding and polishing where a higher purity Silicon Carbide abrasive
is desired. Please review the following grades and specifications and
please contact Greenhill Supply for pricing and availability.
| Typical Chemical Analysis | ||
| Black | Green | |
| SiC | 97.60 % | 99.60 % |
| SiO2 | 0.60 | 0.10 |
| Free Si | 0.80 | 0.05 |
| Free C | 0.50 | 0.15 |
| Fe | 0.20 | |
| Al | 0.30 | |
| Typical Physical Properties – Black | |
| Crystallography | Alpha silicon carbide in a hexagonal crystal. |
| Particle Specific Gravity | 3.20 |
| Knoop100 Hardness | 2480 |
| Particle Shape | Blocky, sharp edged |
| Grading | ANSI B74.12-1982 |
| Bulk Density | ANSI B74.4-1988 (gm/cc) |
| Typical Physical Properties – Green | |
| Crystallography | Alpha silicon carbide in a hexagonal crystal. |
| Particle Specific Gravity | 3.20 |
| Knoop100 Hardness | 2450 |
| Particle Shape | Blocky, sharp edged |
| Grading | FEPA 42-GB-1984 (R1993) |
| Bulk Density | FEPA 44-1986 (R1993) |
| Powder Sizes Available – Black |
| 240, 280, 320, 400, 500, 600, 800, 1000, 1200, F, FF, FFF and FFFF. |
| Powder Sizes Available – Green |
| 230, 240, 280, 320, 360, 400, 500, 600, 800, 1000, 1200 and 1500. |
Walnut shell flour
has a very low density and is best used as a filler for rubber, plywood
and possibly some glue. There are two Walnut Shell Flour sizes available;
WF-5 and WF-7 (200 and 325 mesh respectively). Please review the following
specifications for Walnut Shell Flour and please contact Greenhill
Supply for pricing and availability.
| WF-5 & WF-7 Walnut Shell Flour Specifications | |
| Dry Packing Density | 39 lbs/cu. Ft. |
| Flash Point (Closed Cup) | 380° F |
| Charring Temperature | 470° F |
| Hardness | 3.5 Mohs |
P.O. BOX 46926
Philadelphia,
PA 19140
Tel:215-455-5110
Fax:215-455-5120