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. It provides the technical framework for ensuring that devices used to measure strain in materials are accurate, repeatable, and properly calibrated. ASTM International Core Purpose and Scope
is the most common requirement for determining the modulus of elasticity in metals.
(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.
The combination of Class (accuracy) and Type (gage length) fully defines the performance specification for a given extensometer system. For example, a extensometer is a medium-length device with high accuracy suitable for routine metals testing.
The software or technician calculates the difference between what the calibration rig actually moved and what the extensometer displayed. If the errors fall within the limits shown in the table above, the device receives its classification. Frequency of Verification
The American Society for Testing and Materials (ASTM) is a globally recognized leader in the development and publication of voluntary consensus-based technical standards. Among its vast collection of standards, ASTM E83 holds significant importance in the field of testing and measurement. This article aims to provide an in-depth exploration of ASTM E83, focusing on its PDF version, to equip professionals with a thorough understanding of the standard practice for estimating uncertainty.
Could you tell me a bit more about your current setup so I can provide more relevant information? Specifically:
The Ultimate Guide to ASTM E83: Standard Practice for Verification and Classification of Extensometer Systems
The nominal gauge length of the extensometer must be measured and verified within strict tolerances.
If you need to access the ASTM E83 PDF, you can try the following:
represents the highest precision, with a maximum allowable error of just ±0.1% strain, making it essential for applications demanding the utmost accuracy. Class B-1 and B-2 are commonly required for precise modulus and yield strength determination, with a relative error limit of ±0.5%. Class C allows a relative error of ±1% and is often used for general elongation measurements after the yield point of a material. Class D and Class E provide lower accuracy and are suitable for large-strain measurements where extreme precision is less critical.
: Recent revisions, such as the 2023 version, added specific requirements for optical extensometers
: It covers any system that records values proportional to length changes, including traditional clip-on gauges and modern non-contacting optical systems. Limitations
State whether measurements are recorded in SI units or US customary units. 2. Verification Apparatus & Traceability
The standard applies to instruments used to measure changes in length (displacement) during mechanical testing. This includes contact extensometers (clip-on, strain gauge, LVDT), non-contact systems (video and laser extensometers), and deflectometers. It covers both strain-measuring and crosshead-displacement systems under static or quasi-static loading. 2. Verification Apparatus
ASTM E83 is not an isolated document; it is a cornerstone of many other critical test methods. For example, test methods for determining the tensile properties of metallic materials (ASTM E8) or the flexural properties of plastics (ASTM D790) often cite ASTM E83 to define the required accuracy of the strain-measuring device.
