ISO 204 is a safety standard on metallic materials. Metallic materials is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. ISO 204 specifies the methods for:
ISO 204 describes the percentage permanent extension which is the extension at the end of unloading and at test temperature determined as the difference between the percentage total extension, et, and the sum of percentage elastic extension, ee, plus the percentage anelastic extension, Ek, expressed as a percentage of the reference length, Lr,
ISO 204 on the uniaxial creep testing in tension is relevant to:
Creep is the phenomenon exhibited by materials that slowly deform when subjected to loading at elevated temperatures. ISO 204 is concerned with the method used to measure such material behaviour. ISO 204 includes temperature measurement using thermocouples and their calibration creep testing test pieces with circumferential V and blunt (Bridgman) notches, estimation of measurement uncertainty, methods of extrapolation of creep rupture life, and information about computer compatible representation of standards. ISO 204 incorporates many recommendations developed through the European Creep Collaborative Committee (ECCC). ISO 204 summarizes vital information which should help the user to choose a suitable test type for their needs (i.e., uninterrupted, interrupted, or combined) and apply the established methodology developed within the European Creep Collaborative Committee. Overall, ISO 204 is useful as it assists with the uniaxial creep testing in tension in metallic materials.
BS EN ISO 204:2018 replaces the second edition ISO 204:2009, which has been technically revised. The main changes compared to the previous edition are as follows:
EN ISO 204:2018
ISO 204:2018