Vickers Hardness Number Calculator
Estimate the material hardness for your test specimen using the Vickers hardness number calculator.
What Vickers Hardness Number Calculator does
The Vickers Hardness Number Calculator on Omni Calculator estimates material hardness by processing the diagonal length of an indentation left by a diamond indenter. Users input the mean diagonal length and applied force to receive the Vickers hardness number (HV), along with related values such as surface area hardness and estimated tensile strength. The tool is grounded in the BS EN ISO 6507-1 standard, providing a standardized approach to characterizing the resistance of alloys and composites to permanent deformation. It serves as a practical resource for engineers and researchers conducting preliminary material analysis or comparing test results across different specimens.
How to use the Omni Calculator Vickers Hardness Number Calculator
- 1
Enter the applied force (F) used during the indentation test.
- 2
Input the mean diagonal length (d) of the square-shaped indentation on the specimen surface.
- 3
The calculator computes the Vickers hardness number (HV) using the standardized formula.
- 4
Review the resulting surface area hardness (H) and estimated tensile strength (σᵤ) displayed alongside the primary HV value.
- 5
Use the 'Share result' or 'Clear all' functions to manage or export your calculation.
Best for
Engineers and researchers in structural and materials science who need a quick, standardized estimate of material hardness for alloys, composites, or test specimens without performing manual calculations.
Limitations
- Relies on accurate manual measurement of the indentation diagonal; input errors affect the hardness result.
- Provides an estimate of tensile strength based on the Vickers value, which may not replace direct mechanical testing.
- Designed for metallic materials; applicability to non-metallic or composite specimens may be limited.
Vickers Hardness Number Calculator FAQ
- What units should I use for the diagonal length and force inputs?
- The calculator typically accepts standard metric units for diagonal length (such as millimeters) and force (such as kilograms-force or newtons), but check the specific input labels on the tool for the exact expected units.
- How does the Vickers hardness number differ from other hardness scales like Rockwell or Brinell?
- Vickers hardness uses a square-based diamond indenter and measures the diagonal of the resulting impression, allowing it to be used across a wide range of material thicknesses and types, unlike Rockwell which uses a different geometry and Brinell which uses a carbide ball.
- Can this calculator estimate the tensile strength of a material?
- Yes, the tool provides an estimated tensile strength (σᵤ) based on the calculated Vickers hardness number, though this is a derived approximation and not a substitute for a direct tensile test.
- Is the Vickers hardness test suitable for thin materials or coatings?
- The Vickers test is often preferred for thin materials and coatings because the small indenter size minimizes substrate influence, but the calculator's results should be interpreted within the context of the applicable ISO standard.
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