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Methods for strength, ductility, indentation curves and classical reference values.
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For rapid screening loops, process comparison and data-driven material development.
For transitions, weld zones and small fasteners directly on the relevant part.
Interpretation and quick orientation for existing hardness and strength values.
Overview of the available platforms and the right starting point for your lab.
Three system logics for local material data, from compact lab entry to process-near QA.
Specialised platforms for nanoindentation and contact-free process analysis.
Practical articles, publications and insights into current testing and development projects.
Material characterization, validation, standardisation and transfer of new testing methods into practice.
Quick entry points for the network, overview pages and direct contact.
Methods for strength, ductility, indentation curves and classical reference values.
Complementary analytics for magnetism, topography, surfaces and geometry.
For rapid screening loops, process comparison and data-driven material development.
For transitions, weld zones and small fasteners directly on the relevant part.
Interpretation and quick orientation for existing hardness and strength values.
Overview of the available platforms and the right starting point for your lab.
Three system logics for local material data, from compact lab entry to process-near QA.
Specialised platforms for nanoindentation and contact-free process analysis.
Practical articles, publications and insights into current testing and development projects.
Material characterization, validation, standardisation and transfer of new testing methods into practice.
Hardness testing · Brinell · HBW
In Brinell testing, a tungsten-carbide ball produces a comparatively large indentation under a defined force. The optically measured diameter makes the method particularly useful for cast materials, steels and heterogeneous microstructures with sufficient specimen thickness.
A tungsten-carbide ball of specified diameter D is pressed perpendicularly into the surface with test force F. After unloading, two perpendicular indentation diameters are measured and averaged to obtain d.
The HBW value relates test force to the curved indentation surface. Because the indentation samples a larger material volume than microhardness methods, Brinell averages local microstructural variation more strongly.
The combination of ball diameter, test force, force-diameter ratio and dwell time depends on the material, thickness and applicable standard.
A complete designation combines the hardness value, method symbol, ball diameter, test force and, where required, a non-standard dwell time. Example: 76.3 HBW 2.5/62.5.
| Element | Meaning | Example |
|---|---|---|
| 76.3 | measured Brinell hardness value | 76.3 |
| HBW | Brinell with a tungsten-carbide ball | HBW |
| 2.5 | ball diameter in mm | 2.5 mm |
| 62.5 | historical test-force designation in kgf | ≈ 613 N |
Brinell is suitable for sufficiently thick, coarse or heterogeneous metallic materials. Typical tasks involve castings, forgings, steels and non-ferrous alloys.
Small components, thin layers, narrow heat-affected zones or very hard materials often require a smaller indentation or another method. Edge distances, spacing, surface condition and sharp optical imaging affect uncertainty.
Reliable testing requires verified force application, a suitable ball indenter, a traceable optical measuring system and routine indirect checks with reference blocks. Automatic image evaluation can accelerate the workflow, but blurred edges, pile-up and surface artefacts still require plausibility checks.
The following official standards pages cover the method and its requirements. The complete applicable standard remains authoritative.
Always check the edition contractually applicable to the component, product specification and test date.
Overview
Compare principles, applications and limits.
HV
Evaluate small indentations and hardness traverses.
HBW
Ball indentation and optical diameter measurement.
HR
Depth-difference method for fast routines.
HBW denotes Brinell hardness determined with a tungsten-carbide ball.
Measurements in two perpendicular directions reveal deviations from an ideal circular indentation and provide a mean diameter.
The larger Brinell indentation can provide a more representative average for coarse or heterogeneous microstructures when thickness and available test area are sufficient.
Send the material, expected hardness range, specimen thickness, test locations and required standards edition.
