Metallic materials Tensile testing Part 4: Method of test in liquid helium

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English

Published date

09-29-2015

Publisher

International Organization for Standardization

ISO 6892-4:2015 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 103 s1 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.

DevelopmentNote	Supersedes ISO/DIS 6892-4 and ISO 19819. (09/2015)
DocumentType	Standard
Pages	13
PublisherName	International Organization for Standardization
Status	Current
Supersedes	ISO 19819:2004

Standards	Relationship
BS ISO 6892-4:2015	Identical

ISO 6892-3:2015	Metallic materials Tensile testing Part 3: Method of test at low temperature
ISO 6892-1:2016	Metallic materials Tensile testing Part 1: Method of test at room temperature
ISO 9513:2012	Metallic materials — Calibration of extensometer systems used in uniaxial testing
ISO 7500-1:2015	Metallic materials Calibration and verification of static uniaxial testing machines Part 1: Tension/compression testing machines Calibration and verification of the force-measuring system
ASTM E 1450 : 2016 : REDLINE	Standard Test Method for Tension Testing of Structural Alloys in Liquid Helium