The data obtained from ASTM E9 compression test includes the yield strength, the yield point, Young’s modulus, the stress-strain curve, and the compressive strength for metallic material specimens. This strength is dependent on total strain and specimen geometry. It is of interest in the analyses of structures subject to compressive or bending loads or both and in the analyses of metalworking and fabrication processes that involve large compressive deformation. Buckling and barreling can complicate results and should be minimized. The ASTM E9 test method is not used for materials that fail in compression by a shattering fracture.
Compressive properties are useful for structures subject to compressive forces or bending moments and metal works and fabrication processes involving large compressive deformation such as forging and rolling. On the other hand, for brittle or nonductile metals that fracture in tension at stresses below the yield strength, ASTM E9 compression test can obtain the strain range of the stress-strain data.
ASTM E9 Standard Test Method
| Loading Rate | The standard recommends an acceptable loading rate depending on material qualities and intended results, with special consideration given to high-strength materials. |
| Deformation Measurement | Extensometers or other comparable instruments are used. The placement of the extensometer and factors for calibration are specified. |
| Testing Conditions | The test environment, typically room temperature, is specified in the standard. Additionally, the suggestion is made to run additional tests to confirm that the results are repeatable and reliable. |
