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
The search for often signals a need for authoritative information on verifying and classifying extensometer systems. This article has provided that information in depth, covering the standard’s scope, classification system, verification procedures, relationship to other standards, and official purchasing channels. The six error classes (A through E) and three gage-length types (1 through 3) form the backbone of extensometer specification worldwide.
The standard applies to instruments used to measure strain in tension, compression, and deflection testing. It ensures that the data collected during mechanical testing is accurate, reproducible, and compliant with global quality standards. Key Components of an Extensometer System An extensometer system under this standard includes: astm e83 pdf
Whether you are a testing laboratory manager, a quality engineer, or a researcher, understanding and implementing ASTM E83 is fundamental to producing trustworthy material property data. The standard's classification system provides a clear framework for matching equipment capability to application requirements, while its verification procedures ensure that this capability is maintained over time.
Detail the exact manufacturer, model, and serial number of the extensometer system. : For any chosen strain range
(available as ASTM E83-23 RLV or ASTM E83-25 RLV) is particularly useful for those who need to see changes between editions side by side; it shows deletions with strikethroughs and additions with underlining.
You can purchase and download the most up-to-date version of the PDF directly from the ASTM store website. or professional necessity. Professional/Technical Review
This article delves into the core of ASTM E83, exploring the technical requirements for verifying extensometer systems, its classification framework, and importantly, how to access the official standard document for your own laboratory or quality control processes.
: For any chosen strain range, the technician must apply at least five distinct displacement values .
If you are looking to review or evaluate the standard (Standard Practice for Verification and Classification of Extensometer Systems), here are three "review" styles depending on whether you are assessing the document's utility, technical depth, or professional necessity. Professional/Technical Review