Astm E83 Pdf [work] Jun 2026

The heart of the ASTM E83 standard is its classification matrix. Extensometers are not simply labeled "accurate" or "inaccurate." Instead, they are assigned a class based on their maximum permissible error. The standard defines . Extensometer Class Maximum Error of Gauge Length Fixed Error (whichever is greater) Relative Error (whichever is greater) Typical Application Class A ±plus or minus ±plus or minus 0.00001 in. / 0.00025 mm ±plus or minus 0.1% of value High-precision research calibration Class B-1 ±plus or minus ±plus or minus 0.0001 in. / 0.0025 mm ±plus or minus 0.5% of value Determining Modulus of Elasticity (Metals) Class B-2 ±plus or minus ±plus or minus 0.0002 in. / 0.0050 mm ±plus or minus 0.5% of value Modulus testing with longer gauge lengths Class C ±plus or minus ±plus or minus 0.001 in. / 0.025 mm ±plus or minus 1.0% of value Routine tensile testing, Yield Strength Class D ±plus or minus ±plus or minus 0.01 in. / 0.25 mm ±plus or minus 1.0% of value High-elongation materials (Rubbers/Plastics) Class E ±plus or minus ±plus or minus 0.1 in. / 2.5 mm ±plus or minus 1.0% of value Very high strain or elastomeric testing Understanding Fixed vs. Relative Error

: Errors are calculated as either a percentage of the reading or a fixed value. The system is then assigned a class (e.g., B-1) based on these results. ASTM International 3. Key Technical Considerations astm e83 pdf

The is an indispensable resource for any materials testing lab, providing the necessary protocols to guarantee that extensometer systems are performing correctly. By following the procedures in the standard, you can be confident in the precision of your strain data, ensuring compliance with international quality requirements. The heart of the ASTM E83 standard is

I can provide tailored advice on optimization, calibration procedures, and choosing the right equipment for your project. Share public link Extensometer Class Maximum Error of Gauge Length Fixed