This European standard was introduced in September 2009, and replaces the withdrawn EN 10002-1:2001 standard. It specifies the method for tensile testing of metallic materials and defines the mechanical properties that can be determined at ambient temperature. Instron® participates on the committee, ensuring our products are compliant and our team is educated about the changes and the effect they will have.
Products that may be tested in accordance with this standard include metallic sheets and plates, wire, bar or section, rebar, and tubes. Specimens need to be gripped securely ensuring axial alignment in order to minimize bending. The specimen is then strained in tension until failure using either Method A or Method B control modes. During this time, the load, crosshead extension, time, and strain data are recorded to determine the material characteristics. The typical calculations include: Yield Point (Rp, Reh, Rel), Ultimate Tensile Stress (Rm), specific strain values at calculations (A, Agt etc.). ISO 6892-1 also specifies the specimen geometries that should be used depending on the type of product that is being tested.
The challenges of testing to this standard are:
- Conforming to stringent control modes
- Comparability of results
- Accurate strain measurement
- Automatic compliant calculations
- Secure gripping of varying specimens
- Conforming to Stringent Control Modes – Using advanced controller technology, it is possible to achieve up to a 40% decrease in test time using Method A Closed Loop Strain Control, ultimately improving throughput
- Comparability of Results – When testing to Method B where the strain rate on the specimen will vary system to system, using a stiff Instron frame will ensure accurate results for improved comparability across different sites
- Secure Gripping of Varying Specimens – Varying gripping techniques from DuraSync Side Acting Grips to manual wedge grips with optimized tooth pattern ensures no slippage occurs
- Automatic compliant calculations – Instron Bluehill® testing software has advance pre-built methods available with pre-configured metal-specific calculations helping to ensure compliance
- Accurate Strain Measurement – Advanced strain solutions for contacting and non-contacting stain measurement that can meet or exceed the accuracy requirements of ISO 6892-1
It is important to review ISO 6892-1:2009 in order to fully understand the test setup, procedure, and results requirements.
For more information view the Guide: How to Perform a Tensile Test on Metals to ISO 6892.