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Material
Materials used at Harkesh Rubber
| Properties | NBR | EPDM | CR | VMQ | FKM | HNBR | FVMQ | FFKM |
|---|---|---|---|---|---|---|---|---|
| Common Name | Buna-N, Nitrile |
Ethylene Propylene |
Chloroprene | Silicone | Fluorinated Hydrocarbon |
Hydrogenated Nitrile |
Fluorosilicone | Per Fluoroelastomer |
| Chemical Definition | Ethylene Propylene Diene Co & Terpolymer |
Poly- chloroprene |
Polydim- ethylsiloxane |
Vinylidiene Fluoride Hexa-fluoropropylene |
Hydrogenated Butadiene Acrylonitrile |
Fluororinyl Methyl Siloxane |
Per- fluoroelastomer |
|
| ASTM D-2000 & SAE J 200 | BF BG BK CH | CA BA AA DH | BC BE | FC FE CE | HK | DH | FK | – |
| Minimum Continuous Use Temperature (°C) | -40 to -60 | -40 to -50 | -45 | -70 | -30 | -45 | -70 | -28 |
| Maximum Continuous Use Temperature (°C) | 120 to 140 | 120 to 180 | 125 | 250 | 275 | 170 | 230 | 230 |
Low Temperature (°C)
|
-50 to -65 | -40 | -40 | -60 to -70 | -30 to -40 | -30 to -45 | -65 | -10 to -30 |
| Heat Aging at 100°C | Good | Good-Outstanding | Good-Excellent | Outstanding | Excellent-Outstanding | Outstanding | Excellent-Outstanding | Excellent |
| Aging in Oxygen, Ozone & Weather | Poor-Fair | Very Good | Good | Excellent | Very Good-Excellent | Good | Excellent | Good-Excellent |
| FDA Approved Grades Available | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |