In addition to NR and SBR, other rubber compounds in Butyl, EPDM, and Polyurethane are available on request for specialist applications.
Property |
Testing Standard |
Condition |
Requirement |
Tensile Strength |
ASTM D412 Die C; AS 1180.2; BS 903.A2; ISO 37; JIS K6301 Item 3, Dumbell 3 |
Original |
16MPa (Min) |
Aged from 96Hours at 70°C |
12.8MPa (Min) |
||
DIN 53504 |
Original |
15N/mm2 (Min) |
|
Aged for 168 hours at 70°C |
12.75N/mm2 (Min) |
||
Elongation at Break |
ASTM D412 Die C; AS 1180.2; BS 903.A2; ISO 37; JIS K6301 Item 3, Dumbell 3 |
Original |
400% (Min) |
Aged for 96 hours at 70°C |
320% (Min) |
||
DIN 53504 |
Original |
300% (Min) |
|
Aged for 168 hours at 70°C |
280% (Min) |
||
Hardness |
ASTM D2240; AS 1683.15.2; BS 903.A6; ISO 815; JIS K6301 Item 5A Tester |
Original |
78° (Max) Shore A |
Aged for 96 Hours at 70°C |
Original Value + 6° points increase |
||
DIN 53505 |
Original |
75° (Max) Shore A |
|
Aged for 168 hours at 70°C |
Original Value + 5° points increase |
||
Compression Set |
ASTM D395; AS 1683.13B; BS 903.A6; ISO 815; JIS K6301 Item 10 |
Aged for 22 hours at 70°C |
30% (Max) |
DIN 53517 |
Aged for 24 hours at 70°C |
40% (Max) |
|
Tear Resistance |
ASTM D624; AS 1683.12; BS 903.A3; ISO 34.1; JIS K6301 Item 9, Test Piece A |
Die B |
70kN/m (Min) |
DIN 53507 |
|
80 N/cm (Min) |
|
Ozone Resistance |
ASTM D1149; AS 1683.24; BS 903.A43; DIN 53509; ISO 143/1 |
1ppm at 20% strain at 40°C for 100 hours |
No cracking visible by eye |
Seawater Resistance |
DIN 86076, Section 7.7 |
28 days in artificial seawater at 95°C ±2°C |
Hardness ±10° (Max) Shore A Volume +10/-5% (Max) |
Abrasion Resistance |
BS 903.A9 |
Method B, 1000 revolutions |
0.5cc (Max) |
DIN 53516 |
|
100mm3 (Max) |
|
Bond Strength Steel to Rubber |
BS 903.A21 |
Method B |
7N/mm (Min) |
The above values are for tests carried out under strict laboratory conditions using specimens taken from batches of unvulcanised rubber compound。