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