ISO/TC 164/SC 1 - Uniaxial testing

This document specifies the method for tensile testing of metallic materials and defines the mechanical properties which can be determined at room temperature. NOTE Annex A contains further recommendations for computer controlled testing machines.

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 6892-2:2018 specifies a method of tensile testing of metallic materials at temperatures higher than room temperature.

ISO 7500-1:2018 specifies the calibration and verification of tension/compression testing machines. The verification consists of: - a general inspection of the testing machine, including its accessories for the force application; - a calibration of the force-measuring system of the testing machine; - a confirmation that the performance properties of the testing machine achieve the limits given for a specified class. NOTE This document addresses the static calibration and verification of the force-measuring systems. The calibration values are not necessarily valid for high-speed or dynamic testing applications. Further information regarding dynamic effects is given in the Bibliography. CAUTION Some of the tests specified in this document involve the use of processes which can lead to a hazardous situation.

ISO 26203-1:2018 specifies methods for testing metallic sheet materials to determine the stress-strain characteristics at high strain rates. This document covers the use of elastic-bar-type systems. The strain-rate range between 10−3 and 103 s−1 is considered to be the most relevant to vehicle crash events based on experimental and numerical calculations such as the finite element analysis (FEA) work for crashworthiness. In order to evaluate the crashworthiness of a vehicle with accuracy, reliable stress-strain characterization of metallic materials at strain rates higher than 10−3 s−1 is essential. This test method covers the strain-rate range above 102 s−1. NOTE 1 At strain rates lower than 10−1 s−1, a quasi-static tensile testing machine that is specified in ISO 7500‑1 and ISO 6892‑1 can be applied. NOTE 2 This testing method is also applicable to tensile test-piece geometries other than the flat test pieces considered here.

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 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 6892-3:2015 specifies a method of tensile testing of metallic materials at temperatures between +10 °C and -196 °C.

ISO 9513:2012 specifies a method for the static calibration of extensometer systems used in uniaxial testing, including axial and diametral extensometer systems, both contacting and non-contacting.

ISO 26203-2:2011 gives requirements for the testing of metallic materials. Only examples for testing flat geometries are given; however, other geometries can be tested. The area of application spans a range of strain rates from 10-2 s-1 to 103 s-1. Tests are carried out between 10 °C and 35 °C and, unless otherwise specified, using a servo-hydraulic-type test system.

ISO 376:2011 specifies a method for the calibration of force-proving instruments used for the static verification of uniaxial testing machines (e.g. tension/compression testing machines) and describes a procedure for the classification of these instruments. It is applicable to force-proving instruments in which the force is determined by measuring the elastic deformation of a loaded member or a quantity which is proportional to it.

ISO/TTA 5:2007 recommends and establishes standardized techniques for measuring and analysing Creep Crack Initiation (CCI), Creep Crack Growth (CCG), and Creep Fatigue Crack Growth (CFCG) characteristics, using a wide range of pre-cracked standard and non-standard "feature" geometries.

ISO 7500-2:2006 specifies the verification of testing machines used for uniaxial creep testing in tension in accordance with ISO 204. The verification consists of a general inspection of the testing machine, and a verification of the force applied by the testing machine. ISO 7500-2:2006 applies to dead-weight machines, lever-type creep testing machines and direct-spring-loading machines. Machines with a force-measuring system should be verified in accordance with ISO 7500-1.

ISO 6892-1:2016 specifies the method for tensile testing of metallic materials and defines the mechanical properties which can be determined at room temperature. NOTE Annex A contains further recommendations for computer controlled testing machines.

ISO 7500-1:2015 specifies the calibration and verification of tension/compression testing machines. The verification consists of: - a general inspection of the testing machine, including its accessories for the force application; - a calibration of the force-measuring system of the testing machine; - a confirmation that the performance properties of the testing machine achieve the limits given for a specified class. NOTE This part of ISO 7500 addresses the static calibration and verification of the force-measuring systems. The calibration values are not necessarily valid for high-speed or dynamic testing applications. Further information regarding dynamic effects is given in the Bibliography. CAUTION Some of the tests specified in this part of ISO 7500 involve the use of processes which could lead to a hazardous situation.

ISO 6892-2:2011 specifies a method of tensile testing of metallic materials at temperatures higher than room temperature.

The two parts of ISO 26203 specify methods for testing metallic sheet materials to determine the stress‑strain characteristics at high strain rates. ISO 26203-1:2010 covers the use of elastic-bar-type systems. The strain-rate range between 10-3 to 103 s-1 is considered to be the most relevant to vehicle crash events based on experimental and numerical calculations such as the Finite Elemental Analysis (FEA) work for crashworthiness. In order to evaluate the crashworthiness of a vehicle with accuracy, reliable stress-strain characterization of metallic materials at strain rates higher than 10-3 s-1 is essential. The test method in ISO 26203-1:2010 covers the strain-rate range above 102 s-1.

ISO 6892-1:2009 specifies the method for tensile testing of metallic materials and defines the mechanical properties which can be determined at room temperature.

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.

ISO 376:2004 covers the calibration of force-proving instruments used for the static verification of uniaxial testing machines (e.g. tension/compression testing machines) and describes a procedure for classifying these instruments. ISO 376:2004 generally applies to force-proving instruments in which the force is determined by measuring the elastic deformation of a loaded member or a quantity which is proportional to it.

ISO 7500-1:2004 specifies the verification of tension/compression testing machines. The verification consists of a general inspection of the testing machine, including its accessories for the force application and a calibration of the force-measuring system.

ISO 19819:2004 specifies the method of tensile testing of metallic materials in liquid helium (boiling point at - 269 °C or 4,2 K) and defines the mechanical properties that can be determined. ISO 19819:2004 may also apply to tensile testing at cryogenic temperatures (less than - 196 °C or 77 K), which requires special apparatus, smaller specimens, and concern for serrated yielding, adiabatic heating and strain-rate effects.

This document is an outline procedure for the tensile testing of discontinuously reinforced metal matrix composites (MMC) and defines the mechanical properties which tan be determined at ambient temperature, such as Young's modulus, proportional limits, proof stress, tensile strength and elongation to failure. It follows the European Standard EN 10002 for the tensile testing of metals and its sister document for Aerospace materials EN 20024 Part 1. [refs 1 and 2 in annex C.]