BS 131-6 is a British Standard test method for carrying out a precision Charpy V-notch impact test on metals, focused on consistent determination of absorbed impact energy.
If you are unsure whether a “precision” Charpy workflow is required for your material specification, acceptance testing, or machine capability, you can contact our team to talk through the intended use and the right test setup.
BS 131-6:1998 — Notched bar tests: Method for precision determination of Charpy V-notch impact energies for metals
BS 131-6 describes a controlled Charpy V-notch impact testing approach intended for precision determination of impact energy on metallic materials.
In practice, it is used when tighter control of specimen preparation, machine condition, calibration, and reporting is needed to reduce variability in reported Charpy V-notch energy values.
Quick Definition
Document type: Test method (Charpy V-notch impact testing for metals, with a precision-focused approach).
Primary output: Charpy V-notch absorbed impact energy values (with supporting reporting details that help demonstrate precision and repeatability).
Common lab fit: Metals QA/QC and materials qualification labs using instrumented or non-instrumented pendulum impact systems configured for Charpy V-notch testing.
What This Standard Covers
BS 131-6 is centered on the elements that drive result quality in Charpy V-notch impact testing.
Key coverage areas typically include: testing machine requirements, Charpy test piece preparation, calibration approach, test procedure, and test reporting expectations. It also includes informative guidance related to lateral expansion measurement.
Why This Standard Matters in Testing
Charpy impact energy is frequently used as a comparative toughness indicator and as a screening/acceptance metric in metals supply chains. When a project calls for “precision” determination, small differences in notch quality, striker condition, support geometry, and machine verification can materially shift the reported energy.
BS 131-6 is used to tighten control of those variables so results are more comparable across operators, shifts, and (where applicable) sites.
Common Materials, Product Types, or Applications Covered
This standard applies to metallic materials tested using Charpy V-notch test pieces.
Common use cases: qualifying or monitoring steel and other metal products where Charpy V-notch energy is specified, investigating variability in impact results, and supporting controlled test reporting when procurement or project documentation calls for a precision-focused Charpy method.
Common Test or Verification Workflow
BS 131-6 generally fits into an impact testing workflow where the lab needs to demonstrate strong control over specimen preparation and machine condition.
Typical workflow steps: prepare Charpy V-notch specimens to the required dimensions/finish, verify key aspects of the impact machine configuration and condition, perform calibration/verification activities as required by the method, run the Charpy impacts, and produce a test report with the required details for traceability and interpretation.
Equipment Commonly Used for This Standard
BS 131-6 is strongly equipment-influenced because it depends on controlled pendulum impact testing and disciplined specimen preparation.
- Charpy pendulum impact testing machine configured for Charpy V-notch testing, with appropriate striker/hammer configuration and supports/anvils.
- Specimen preparation tools suitable for producing consistent Charpy V-notch specimens (cutting/machining and notching).
- Calibration and checking tools used to support the method’s calibration and verification expectations for precision work.
- Measurement tools for confirming specimen dimensions and documenting test details; where lateral expansion is recorded, appropriate gauges may be used.
If you are aligning a pendulum impact system, striker configuration, and specimen prep tooling to a customer’s cited edition of BS 131-6, you can request a detailed quote for an equipment package matched to your lab’s workflow.
How to Read This Designation or Revision
Designation format: “BS 131-6” identifies Part 6 within the BS 131 notched bar test series.
Year suffix: “BS 131-6:1998” indicates the 1998 edition.
Revision sensitivity: Impact testing is sensitive to details such as striker/support geometry, calibration expectations, specimen tolerances, and reporting requirements, so purchasing and lab procedures should match the exact edition cited in the controlling specification.
Related Standards, Methods, or Frameworks
BS 131-6 is commonly used alongside companion parts within the BS 131 series for notched bar testing, and it is often referenced in broader mechanical test programs that include tensile, hardness, and fracture/impact characterization.
Companion reference: BS 131-7 is associated with verification of the test machine used for precision determination of Charpy V-notch impact energies, and is commonly consulted when a precision Charpy program is being set up.
Talk with a Charpy impact testing specialist
If you need help matching your Charpy pendulum impact tester configuration, calibration approach, and specimen preparation tooling to the way BS 131-6 is cited in your customer or internal specification, talk with our team and we’ll help you map the standard-driven requirements to a practical lab setup.