Determination of Ball-Indentation Hardness of Elastomers (IRHD) - Micro Hardness Test
|Publication Date:||8 July 2009|
The object of this test method is the accurate determination of the hardness of elastomers, between 35 and 98 International Rubber Hardness Degrees (IRHD) by a ball indentation method. It permits accurate and reproducible hardness determinations to be made on test pieces of small dimensions, e.g. lip seals or O- rings.
Three methods of test piece preparation are described in clause 3 which ensure (applicable to method A according to clause 220.127.116.11 or to method C according to clause 18.104.22.168) reproducibility of the measured hardness value.