Provides methods for determining compression stress-strain properties of vulcanized or thermoplastic rubber, using a specified test piece. The two procedures do not give the same results. With lubricated test pieces, the results are dependent only on the modulus of the rubber and are independent of the test piece shape, provided that complete slip conditions are achieved. Effective lubrication is sometimes difficult to achieve and it is prudent to inspect the variance in the test results from replicate test pieces for indications of erratic slip conditions. Guidance on the effect of size and shape of test piece and of bonding or lubricating is given. Not suitable for materials that exhibit high set.

BS 903-A4(1973) : LATEST

BS ISO 7743 : 2017

ISO 7743 : 2017 - Identical