DIN EN ISO 9513 describes a standardized approach for the static calibration of extensometer systems used during uniaxial mechanical testing of metallic materials. It is commonly used to support standards-based tensile testing where strain or extension must be measured with defined accuracy.
If you need help matching the right extensometer type (contacting or non-contacting) and calibration approach to your specific tensile test method and reporting requirements, contact our team.
DIN EN ISO 9513: Metallic materials – Calibration of extensometer systems used in uniaxial testing
DIN EN ISO 9513 is used when you need confidence that an extensometer system is measuring extension/strain correctly within defined limits. It applies to extensometer systems used in uniaxial testing, including axial and diametral extensometer systems, and includes both contacting and non-contacting measurement systems.
This standard is typically referenced as part of a broader testing and quality workflow: the tensile test method defines what must be measured and reported, while DIN EN ISO 9513 helps ensure the extensometer measurement system used for that test is properly calibrated.
Quick Definition
Document type (practical): Calibration method for extensometer systems (static calibration) used in uniaxial testing.
What it helps you do: Establish and document traceable performance of an extensometer system so strain/extension data used for uniaxial testing can meet the accuracy needs of the cited test standard and internal QA requirements.
What This Standard Covers
DIN EN ISO 9513 focuses on the calibration of the extensometer system itself (the measurement chain used to determine extension), rather than the strength test of the specimen.
Common scope elements include: Static calibration steps and evaluation for extensometer systems used in uniaxial testing; applicability to axial and diametral extensometry; and coverage of both contacting and non-contacting systems.
Why This Standard Matters in Testing
Extensometer performance directly affects strain-based results such as modulus-related values, yield/offset determinations, and elongation/strain reporting during tensile testing. Even when the force measurement side of a universal testing machine is well maintained, inaccurate extension measurement can lead to failed audits, disputed results, or inconsistent data across labs.
Using DIN EN ISO 9513 helps align extensometer calibration with a recognized, standards-based method so strain/extension measurements are defensible and repeatable.
Common Materials, Product Types, or Applications Covered
DIN EN ISO 9513 is written for metallic materials and is most often used in laboratories and production environments running uniaxial mechanical tests on metals.
Common applications: Tensile testing of metals where the test method requires calibrated extensometry for strain/extension measurement; QA/QC verification of extensometers used on universal testing machines; and lab calibration programs supporting accredited or customer-audited testing.
Common Test or Verification Workflow
DIN EN ISO 9513 typically fits into a calibration and verification cycle rather than a daily production test procedure.
Common workflow: Select the extensometer configuration used for the uniaxial test (axial or diametral; contacting or non-contacting) → perform static calibration against a suitable calibration apparatus and supporting measurement equipment → evaluate results against the standard’s requirements → document the calibration outcome for quality records → use the calibrated extensometer for standards-based tensile testing until the next required calibration interval or event.
Equipment Commonly Used for This Standard
DIN EN ISO 9513 is equipment-oriented in the sense that it drives what you need to calibrate and how you document performance, but it does not replace the test method requirements used for the actual tensile test.
Common equipment families: Extensometers (contacting clip-on or long-travel types; diametral extensometers; and non-contacting extensometer systems such as optical/video/laser-based systems) and a suitable calibration apparatus for static calibration, along with supporting metrology tools and data acquisition/control to record and evaluate readings.
If you are specifying a tensile testing setup that will rely on calibrated extensometry, you can request a detailed quote for an extensometer and calibration-ready configuration matched to your measurement range and test workflow.
How to Read This Designation or Revision
DIN EN ISO: This indicates the standard is adopted in Germany (DIN) based on a European adoption (EN) of an ISO standard.
Common citation formats: You may see the standard referenced as DIN EN ISO 9513 with a year/month suffix (for the German adoption), and you may also see EN ISO 9513 or ISO 9513 referenced in customer specifications and test reports. For compliance and audits, the exact cited edition matters—especially when calibration records must match the referenced revision.
Related Standards, Methods, or Frameworks
DIN EN ISO 9513 is commonly used alongside uniaxial tensile test standards for metals that require calibrated strain/extension measurement. In practice, the tensile test standard tells you what results to determine and report, while DIN EN ISO 9513 supports confidence in the extensometer system used to generate those strain/extension results.
Talk with us about calibration-ready extensometry
If you are aligning a lab or production line to a customer tensile-testing requirement and need to confirm extensometer type, measurement range, and calibration approach for the cited edition of DIN EN ISO 9513, talk with our team about your setup and documentation needs.