"The ASTM E83 standard from ASTM International is the definitive guide for extensometer verification. The PDF is easy to navigate with a clickable table of contents, which is helpful since the technical jargon is quite dense. It’s not a 'how-to' for beginners, but for confirming that your strain data meets industry requirements, there is no substitute. Be prepared for a lot of math regarding error tolerances." Academic/Student Review
: Prior to starting, the testing atmosphere and the device must reach thermal equilibrium to eliminate thermal expansion drift.
If an extensometer miscalculates strain, calculations for Yield Strength, Young’s Modulus (Modulus of Elasticity), and Elongation at Break will be incorrect. astm e83 pdf
The standard applies to any instrument that indicates or records values proportional to changes in length caused by either tensile or compressive strain. It is relevant across numerous industries, including aerospace, automotive, construction, metallurgy, and plastics manufacturing, wherever precise material property testing is required.
Used for larger strain measurements, elastomer testing, or rough crosshead travel verifications where high precision is not required. Calibration and Verification Procedure "The ASTM E83 standard from ASTM International is
Note: The following is a comprehensive, long-form technical summary and guide based on the content and scope of ASTM E83. This document is for educational and reference purposes. To obtain the official copyrighted PDF document for certification or legal use, please visit the ASTM International website.
In the field of materials testing, accuracy in measuring strain is crucial for determining fundamental properties such as Young’s Modulus, yield strength, and elongation. , officially titled Standard Practice for Verification and Classification of Extensometer Systems , serves as the foundational document for ensuring that the instruments used to measure these properties are accurate, reliable, and standardized across industries. Be prepared for a lot of math regarding error tolerances
To determine a class, three main parameters are evaluated:
The standard requires the test to be conducted within a specific temperature range (usually 20°C ± 2°C or similar) because thermal expansion can affect the calibration of both the extensometer and the reference standard.
is the standard practice for the "Verification and Classification of Extensometer Systems." Published by ASTM International (formerly the American Society for Testing and Materials), this standard defines how to determine the accuracy of devices that measure strain (deformation) in a test specimen.
The extensometer, calibrator, and testing environment must stabilize at a temperature regulated between 18°C and 28°C (65°F to 82°F). Temperature fluctuations can cause thermal expansion, ruining micro-inch measurements.