The ASTM E83 standard is titled "Standard Practice for Verification and Classification of Extensometer Systems." It provides the rules for how extensometers—tools that measure how much a material stretches or compresses—are calibrated and graded based on their accuracy. 📄 Key Document Details
Latest Version: ASTM E83-23 (Published Feb 2023). A pending version, E83-25, is scheduled for release in mid-2025.
Purpose: Establishes procedures to verify accuracy, linearity, and repeatability in tension or compression.
Classification: Systems are graded (e.g., Class B-1, Class C) based on the magnitude of their error.
Recent Update: The 2023 version added Annex A1, specifically for optical and non-contact extensometers. 🔍 Verification Classes (Accuracy Limits)
Extensometers are classified by the maximum allowable error. Common classes include:
Class A: The most precise, used for extremely tight tolerances.
Class B-1: Often required for determining Modulus of Elasticity (Young's Modulus).
Class C: Typically used for measuring yield strength and overall elongation. 🔗 Where to Get the PDF
ASTM standards are copyrighted and usually require purchase. However, some resources offer previews or full versions: Astm E83-16 | PDF - Scribd
ASTM E83, titled the "Standard Practice for Verification and Classification of Extensometer Systems," provides the fundamental framework for ensuring that devices used to measure strain in materials—such as those used in tensile and compression testing—are accurate and reliable. The standard is essential for laboratories to maintain traceability to international measurement systems, ensuring that data produced in one facility is comparable and verifiable by others, such as customers or quality assurance auditors. Key Functions and Scope
The practice covers the procedures required to verify and classify extensometer systems based on the magnitude of their measurement errors.
Verification Procedures: This involves applying a series of controlled displacements to an extensometer using a calibrated apparatus (extensometer calibrator) and comparing the device's output to the reference.
Classification System: Based on the results of verification, systems are assigned classes (e.g., A, B-1, B-2, C) that define their performance limits. For instance, a Class B-1 classification requires an error of strain not to exceed the greater of of the value.
Broad Applicability: It applies to both contacting and non-contacting (optical/video) extensometers and is compatible with both SI and US customary units because strain is a dimensionless quantity. Recent Updates (ASTM E83-23/25) astm e83 pdf
The standard is frequently revised to address emerging technologies. The 2023 revision (ASTM E83-23) introduced Annex A1, which specifically focuses on the verification requirements for optical extensometers, emphasizing the importance of consistent setup to account for variables that impact digital device performance. As of early 2025, the newest edition is listed as ASTM E83-25. Critical Role in Material Testing
Accurate strain measurement is vital because it directly impacts the calculation of key mechanical properties, including: Yield Strength Tensile Strength Elastic Modulus (Young's Modulus) Fracture Toughness
Without adherence to E83, laboratories cannot guarantee the reproducibility or reliability of their data, which is a core requirement for Quality Assurance programs.
Verification: Fixed and Relative Errors - Epsilon Technology
ASTM E83 provides a foundational standard for verifying and classifying extensometer systems based on error magnitude, ensuring accurate measurements of material displacement during tensile or compressive testing. It establishes performance classes (A through E) and defines procedures essential for reliable material data in structural and industrial applications. Learn more about the standard at ASTM store.astm.org/standards/e83.
E83 Standard Practice for Calibration, Verification ... - ASTM
ASTM E83 is the standard practice for the verification and classification of extensometer systems
used to measure tensile or compressive strain. It ensures that the strain data recorded during mechanical testing is accurate and traceable to national standards. ASTM International 1. Classification of Extensometer Systems
Extensometers are classified based on the magnitude of their errors. Each class has specific limits for "Error of Strain" (relative error) and "Fixed Error" (absolute error). ASTM International Maximum Error of Strain Indicated Typical Application High-precision research Metals testing (Yield strength) Standard metals testing High-elongation polymers Lower accuracy requirements Basic deformation monitoring
Note: Classes B-1 and B-2 differ in their fixed error limits, with B-1 being more stringent. MTS Systems 2. Verification Procedure
The verification process involves comparing the extensometer's readings against a known, highly accurate displacement standard. ASTM International Pre-Verification Inspection
: Check for mechanical wear, damaged knife edges, or electrical issues.
: The extensometer is mounted on a calibration device (micrometer or laser interferometry system) that applies controlled displacements. Measurement Sequence
: A series of precise displacements are applied. The system's response is recorded and compared to the standard's displacement. Data Analysis The ASTM E83 standard is titled "Standard Practice
: 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 | Verification and Classification of AVE3 - Instron
ASTM E83 is the standard practice for the verification and classification of extensometer systems, which are instruments used to measure the change in length of a specimen during material testing. Essential Information from ASTM E83
The standard outlines the procedures for calibrating and classifying extensometer systems based on their accuracy and precision. Key aspects typically covered in the text include:
Classification Levels: Systems are classified (e.g., Class A, B-1, B-2, C, D, E) according to their maximum allowable error and repeatability.
Verification Procedures: Step-by-step methods for verifying the strain-measuring accuracy of the device against a known standard.
Calibration Frequency: Guidelines on how often these systems should be verified to ensure data integrity during tension or compression tests.
Reporting Requirements: Mandatory data that must be included in a verification report, such as the classification achieved and the temperature at which tests were performed. How to Access or Convert the Text
If you have a PDF of the standard and need to "make text" (extract or convert it), you can use several methods:
Standard Conversion: Use tools like Adobe Acrobat, Microsoft Word, or Google Docs to open and save the PDF as an editable text or Word document.
OCR for Scanned Documents: If the PDF is a scan (non-selectable text), utilize Optical Character Recognition (OCR) features available in software like Abbyy FineReader or free online tools like Smallpdf.
Official Purchase: You can obtain the official, high-quality digital version directly from the ASTM International website to ensure accuracy and compliance with the latest revisions. Astm E83 _ RC Schank Copy www.staff.ces.funai.edu.ng
In the world of materials testing and mechanical engineering, precision is everything. When a metal bar is pulled in a tensile tester, the data collected is only as reliable as the instrument measuring the stretch. This is where ASTM E83 becomes the silent guardian of quality control.
If you have searched for the term "astm e83 pdf" , you are likely facing one of three scenarios: you are a lab technician needing to verify your extensometer, a quality manager preparing for an audit, or an engineer writing a procurement specification. Introduction In the world of materials testing and
This article serves as your complete resource. We will explain what ASTM E83 is, why the document is critical for ISO/IEC 17025 accreditation, how to classify extensometers, and—most importantly—how to legally and safely obtain the ASTM E83 PDF.
The standard does not tell you how to build an extensometer; it tells you how to prove it works. It establishes a uniform method for classifying extensometers into specific accuracy classes (Class B-1, B-2, C, D, E, etc.) based on the relative error of the strain measurement.
If you are performing a tensile test according to ASTM E8 or ASTM A370, you cannot legally claim compliance unless your extensometer meets the requirements of ASTM E83.
Class A:
Class B:
Class C:
Class D:
Class E & Class F:
To determine a class, three main parameters are evaluated:
Searching for "astm e83 pdf free download" can put your lab at serious legal and professional risk.
Many engineering universities subscribe to ASTM Compass. If you are a student or faculty, check your library portal. Large corporations often have a "standards librarian" who can email you the PDF.
Free PDFs are usually:
Material testing data is only as good as the measurement tools used. ASTM E83 addresses several key aspects of measurement quality: