Weatherproofing
Mechanical and Thermal Properties of Seals
Mechanical and thermal properties of thermoset and Thermoplastic seals — batch control tests on Finished sealing washer product
| Test Standard | Test description | Thermoset seals | Thermoplastic seals |
|---|---|---|---|
| ASTM D2240 | Durometer hardness (Shore A) | Tolerance ±5 | Tolerance ±5 |
| ASTM D412 | Tensile strength (min. MPa) Ultimate Elongation (%) | 6 Min. 125 | 3 Min. 200 |
| ASTM D257 | DC resistance of finished articles when tested at 1000 V | 2000 MΩ | 2000 MΩ |
| Specific gravity | Tolerance ±0.02 | Tolerance ±0.02 |
Every batch of seals shall be tested to meet these requirements. The nominal specific gravity and hardness shall be established for each product, and then tolerances in the table shall apply.
Sealing Properties
The seal for a self-drilling screw should prevent loss of vacuum for 30 seconds when using the test procedure in Appendix K of AS/NZS 3566.
Clause:
017_002_005_000_000_000_000_000_000
Clause Number:
17.2.5
/cop/testing-and-mrm-standards/mrm-fastener-performance-requirements-and-testing#weatherproofing
Revision Category:
4 - Clause Inserted
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