On standards for mechanical testing of materials at cryogenic temperatures

The basic principles of the ASTM, ISO, and GOST standards specifying the procedure for tensile testing of metals at liquid helium temperatures are considered and analyzed. The main factors that influence the parameters of the strain- and stress-controlled loading, as well as the dimensions of specimens in tests of metals and alloys under the above temperatures are determined. Recommendations on extending and revising the provisions of standards are provided.