ISO/TC 164/SC 1/WG 2 - Creep and stress relaxation testing

This document specifies the methods for a) uninterrupted creep tests with continuous monitoring of extension, b) interrupted creep tests with periodic measurement of elongation, c) stress rupture tests where normally only the time to fracture is measured, d) a test to verify that a predetermined time can be exceeded under a given force, with the elongation or extension not necessarily being reported. NOTE A creep test can be continued until fracture has occurred or it can be stopped before fracture.

ISO 204:2009 specifies the method for the uninterrupted and interrupted creep tests and defines the properties of metallic materials which can be determined from these tests, in particular the creep elongation and the time of creep rupture, at a specified temperature. The stress rupture test is also covered, as is the testing of notched test pieces.