Material-specific hardness relationships; the applicable edition and material scope must be confirmed before use.
Engineering
Brinell hardness
Enter your values below for a clear, instant result.
Your result
HB
Interpolated table value
HRC40
HB371
HV392
FormulaPiecewise-linear interpolation within a non-austenitic-steel hardness conversion table.
- Validate that the material and test scale fit the stated scope.
- Locate the two surrounding tabulated values.
- Interpolate between those values without extrapolation.
Worked example: Around 40 HRC corresponds to approximately 371 HB and 392 HV.
Estimate notice: This brinell hardness result is an estimate based only on the values and assumptions shown. Verify important decisions with the relevant official source or a qualified professional.
Approximate conversion for non-austenitic steels only. ASTM E140 states that conversions are material-specific; do not use this result for acceptance testing or certification.
Understand the result before using it
Brinell hardness uses hardness value and input scale to calculate its result. It applies a stated engineering relationship to idealized dimensions or material values entered by the user.
Formula, assumptions, and example
Formula
Piecewise-linear interpolation within a non-austenitic-steel hardness conversion table.
Assumptions
- The entered hardness value and input scale are complete, valid, and use the units or format shown beside each field.
- Geometry, loading, boundary conditions, and material properties match the simplified model.
- User-entered properties come from an applicable specification or test certificate.
Worked example
Around 40 HRC corresponds to approximately 371 HB and 392 HV.
When to use it
Good uses
- Perform a preliminary calculation or independent arithmetic check.
- Compare candidate dimensions, materials, or unit systems.
- Document the assumptions to verify later against the controlling standard.
Limitations
Common mistakes to avoid
- The calculation does not select safety factors, evaluate failure modes, certify materials, or check regulatory compliance.
- Never treat a generic property or hardness conversion as a substitute for testing and professional design review.
- Approximate conversion for non-austenitic steels only. ASTM E140 states that conversions are material-specific; do not use this result for acceptance testing or certification.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
The controlling sources for properties, tolerances, test methods, and acceptance criteria.
Questions about this calculation
What does the Brinell hardness calculate?
Brinell hardness uses hardness value and input scale to calculate its result. It applies a stated engineering relationship to idealized dimensions or material values entered by the user. The formula used is: Piecewise-linear interpolation within a non-austenitic-steel hardness conversion table.
Which inputs affect the Brinell hardness result?
The result uses hardness value and input scale. Changing any of these values can change the output, so enter them using the labels and units shown.
Is the Brinell hardness result exact?
This brinell hardness result is an estimate based only on the values and assumptions shown. Verify important decisions with the relevant official source or a qualified professional.
When should I verify a Brinell hardness result?
Verify it before any financial, health, academic, construction, safety, or engineering decision. Use the primary source or an appropriately qualified professional.
Clear answers, without the guesswork
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