ISO 7743 helps test for compression stress-strain properties of vulcanized or thermoplastic rubber using a standard test piece with the metal plates lubricated; metal plates bonded to the test piece;using a product or a part of a product with the metal plates lubricated.. NOTE For well-specified product shapes, such as O rings, the result may be correlated to the hardness value. The methods are not suitable for materials that exhibit high set.

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