ISO 6892-4:2015 PDF

Scope: This part of ISO 6892 specifies the method of tensile testing of metallic materials in liquid helium (the boiling point is –269 °C or 4,2 K, designated as 4 K) and defines the mechanical properties that can be determined. This part of ISO 6892 may apply also to tensile testing at cryogenic temperatures (less than –196 °C or 77 K), which requires special apparatus, smaller test pieces, and concern for serrated yielding, adiabatic heating, and strain-rate effects. To conduct a tensile test according to this part of ISO 6892 at 4 K, the test piece installed in a cryostat is fully submerged in liquid helium (He) and tested using displacement control at a nominal strain rate of 10−3 s−1 or less. NOTE The boiling point of the rare 3He isotope is 3,2 K. Usually, the tests are performed in 4He or a mixture of 3He and 4He with a high concentration of 4He. Therefore, the temperature is, as designated before, 4 K.

ISO 6892-4:2015 Referenced Document

ASTM E1450-09 Standard Test Method for Tension Testing of Structural Alloys in Liquid Helium*， 2024-04-20 Update
ISO 6892-1:2009 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
ISO 6892-3:2015 Metallic materials - Tensile testing - Part 3: Method of test at low temperature
ISO 7500-1:2004 Metallic materials - Verification of static uniaxial testing machines - Part 1: Tension/compression testing machines - Verification and calibration of the force-measuring system
ISO 9513:2012 Metallic materials - Calibration of extensometer systems used in uniaxial testing
JIS Z 2277:2000 Method of tensile testing for metallic materials in liquid helium

2015 ISO 6892-4:2015 Metallic materials - Tensile testing - Part 4: Method of test in liquid helium