SPECIFICATION DATA FOR BLACK / GREY EPDM ROUND-CUT WASHERS USED ON CORROSHIELD® SELF-DRILLING FASTENERS
Typical Physical Properties of CORROSHIELD® Black / Grey EPDM Washers
EPDM is cross-linked copolymer consisting of ethylene, propylene and a proportion of diene. This elastomer is particularly characterized by very good ageing and atmosphere resistance. EPDM is stable in: Hot water, steam, suds, ketones, hydraulic fluids from the HFC group which have poor flammability and a few HDF types, acids, bases, glycol-based brake fluids, cooling water fluids (water ethylene glycol), ozone. Skydrol® 500 and 700 (phosphate ester fluids).
| PROPERTY | VALUE | TEST METHOD |
|---|---|---|
| BASE MATERIAL |
ETHYLENE PROPYLENE DIENE MONOMER | N/A |
| COLOUR | BLACK / GREY | N / A |
| TEST TEMPERATURE |
-45°C TO +50°C | TYPE |
| DUROMETER HARDNESS |
70 (+/- 5) | ASTM D2240 |
| TENSILE TRENGTH |
10MPA (1450 psi) MIN | ASTM D41D2 |
| ULTIMATE ENLOGATION |
250% MIN | ASTM 412 A/C |
| HEAT RESISTANCE |
HEAT AGING 70HRS @ 100°C CHANGE / HARDNESS MAX. +/- 10PTS CHANGE / TENSILE MAX. +/- 25% CHANGE / ULTIMATE ENLONGATION MAX. -25% | ASTM D573 |
| COMPRESSION SET |
MAX 25% | ASTM 395B |
| OZONE RESISTANCE |
NO OBSERVED EFFECT (70HRS @ 50 pphm) 100% QUALITY RETENSION FACING |
ASTM D1171 |
| LOW TEMP BRITTLENESS |
NON-BRITTLE 3mins @ -55°C | ASTM D2137 |
| UV RESISTANCE |
EXCELLENT | – |
| RESISTANCE TO AGING |
EXCELLENT | – |
| NON-STAINING | PASS | – |