ISO 527-1 defines the general principles used to determine tensile properties of plastics and plastic composites using a tensile testing machine under controlled conditions.
It is commonly referenced for tensile strength and tensile modulus reporting, and it is used alongside the appropriate ISO 527 “Part” that specifies specimen and test conditions for a specific material form. If you need help matching your material and data requirements to the right part and setup, talk with our team.
ISO 527-1: Plastics — Determination of tensile properties — Part 1: General principles
ISO 527-1 is a tensile testing standard focused on the “how” of measuring tensile behavior (stress/strain response) and deriving reported tensile properties under defined conditions.
Because it is the general-principles document in a multi-part series, ISO 527-1 is typically paired with another ISO 527 part that gives more specific test conditions for the material form (for example, moulded plastics, films, or composites).
Quick Definition
General principles for tensile testing of plastics and plastic composites, used to generate tensile strength, tensile modulus, and related stress/strain properties from a controlled tensile test.
What This Standard Covers
ISO 527-1 establishes the overall framework for tensile testing of plastics and plastic composites, including the core approach for producing and interpreting a tensile stress/strain curve.
It is intended for use with defined conditions and defined specimen types, with the detailed specimen/test-condition selections typically provided in subsequent parts of ISO 527 for specific material categories and product forms.
Typical reported results influenced by ISO 527-1: Tensile strength, tensile modulus, and other aspects of the tensile stress/strain relationship.
Why This Standard Matters in Testing
ISO 527-1 provides a consistent, internationally recognized basis for how tensile properties are generated and reported for plastics, which improves comparability across materials, suppliers, and test labs.
For many QA/QC and R&D programs, aligning to ISO 527-1 helps ensure the strain measurement approach (and resulting modulus/elongation results) is appropriate for plastics testing rather than relying only on machine crosshead displacement.
Common Materials, Product Types, or Applications Covered
ISO 527-1 is broadly used for plastics and plastic composites where tensile properties are needed for material characterization, product development, supplier qualification, and production control.
Common use cases: Material datasheets and incoming inspection, process-change validation, design allowables screening, and tensile property comparisons across resin grades, filler levels, or reinforcement configurations (when paired with the applicable ISO 527 part).
Common Test or Verification Workflow
Most tensile programs referencing ISO 527-1 follow a straightforward workflow that emphasizes specimen selection, controlled loading, and correct strain measurement.
- Select the appropriate ISO 527 “Part” for specimen geometry and test conditions for the material form being tested.
- Prepare and condition specimens as required by the cited ISO 527 part and internal lab procedure.
- Run the tensile test on a universal testing machine with suitable grips and force capacity.
- Measure strain over a defined gauge length (commonly with an extensometer or equivalent strain measurement) when modulus and accurate strain values are required.
- Calculate and report the required tensile properties and test conditions in the test report.
Equipment Commonly Used for This Standard
ISO 527-1 testing is typically performed on a servo-electric or servo-hydraulic universal testing machine configured for plastics tensile work.
Common equipment families: Universal testing machine (UTM) with appropriate load cell capacity; wedge or pneumatic grips appropriate for plastics; extensometer or non-contact strain measurement; test software for stress/strain and modulus calculations.
Common configuration decisions that affect quoting: Force range and load cell selection, grip type and jaw faces for the specimen, extensometer gauge length and travel, and whether you need temperature-controlled testing (when required by your internal specification or the specific ISO 527 part you cite).
How to Read This Designation or Revision
ISO 527-1 identifies Part 1 of the ISO 527 series, which is the general-principles document for tensile testing of plastics.
ISO 527-1:2019 indicates the year of publication for the cited edition. Test setup, calculation details, and reporting expectations can vary by edition, so procurement documents and customer specifications should cite the full designation (including year) whenever possible.
Related Standards, Methods, or Frameworks
ISO 527-1 is commonly used together with other parts of ISO 527 that define test conditions for specific material forms. Selecting the correct part is important because it drives specimen selection and key test-condition requirements.
- ISO 527-2: Test conditions for moulding and extrusion plastics
- ISO 527-3: Test conditions for films and sheets
- ISO 527-4: Test conditions for isotropic and orthotropic fibre-reinforced plastic composites
- ISO 527-5: Test conditions for unidirectional fibre-reinforced plastic composites
Request pricing for an ISO 527-1 tensile test setup
If you are specifying a plastics tensile system with the right grips and strain measurement for ISO 527-1 reporting, you can request a detailed quote based on your specimen type, force range, and extensometer needs.