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Detail the exact manufacturer, model, and serial number of the extensometer system.
Many laboratories operating internationally need to understand the relationship between ASTM E83 and the international standard (Metallic materials — Calibration of extensometer systems used in uniaxial testing). While both standards address similar topics, there are important differences:
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Materials testing relies on absolute precision. When determining the mechanical properties of a material—such as yield strength, Young's modulus, and elongation—the accuracy of your data is entirely dependent on the performance of your strain-measuring instruments.
Allows test results from different laboratories worldwide to be compared accurately. Key Classifications Under ASTM E83 The official repository where you can purchase and
: Check for mechanical wear, damaged knife edges, or electrical issues.
An extensometer certificate is not valid indefinitely. According to ASTM E83, an extensometer system must be verified: At intervals not exceeding (annual calibration).
With this information, I can provide a more tailored compliance plan or calibration check-list. Share public link While both standards address similar topics, there are
You can purchase and download the most up-to-date version of the PDF directly from the ASTM store website.
The allowable variance between the actual displacement applied by a calibration apparatus and the displacement read by the extensometer. Summary of Classification Requirements Classification Maximum Error of Gage Length Fixed Error Tolerance (whichever is greater) Relative Error Tolerance (whichever is greater) Typical Application Class A ±0.1% of gage length ±0.00001 in. (0.00025 mm) ±0.1% of value Ultra-high precision research calibration Class B-1 ±0.25% of gage length ±0.0001 in. (0.0025 mm) ±0.5% of value Modulus of elasticity (metals), yield strength Class B-2 ±0.5% of gage length ±0.0002 in. (0.005 mm) ±0.5% of value Yield strength, strain hardening exponents Class C ±1.0% of gage length ±0.001 in. (0.025 mm) ±1.0% of value General tensile testing, percent elongation Class D ±1.0% of gage length ±0.01 in. (0.25 mm) ±1.0% of value High-elongation materials, elastomers Class E ±1.0% of gage length ±0.1 in. (2.5 mm) ±1.0% of value Extreme elongation, cord/rope testing The Verification Process