Hardness Converter (HB ↔ HV ↔ UTS)
Brinell to Vickers and an estimated tensile strength for steels.
The 3.45 factor is why a portable hardness tester estimates pipe strength in seconds. It drifts for cold-worked or austenitic materials — ±10% is the honest band.
Formula
Note: Empirical correlations for carbon/low-alloy steels; not valid for aluminium, austenitic SS or castings.
Hardness Converter (HB ↔ HV ↔ UTS) is a free hardness converter for design engineers, metallurgists and QA inspectors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Hardness Converter (HB ↔ HV ↔ UTS)
Brinell to Vickers and an estimated tensile strength for steels. The calculation implements HV ≈ 1.05·HB; UTS(MPa) ≈ 3.45·HB (steels) (ASTM E140 — hardness conversion tables). The 3.45 factor is why a portable hardness tester estimates pipe strength in seconds. It drifts for cold-worked or austenitic materials — ±10% is the honest band.
How to use Hardness Converter (HB ↔ HV ↔ UTS)
- 1Enter Brinell hardness HB.
- 2Read Vickers HV (approx), Est. tensile strength (steel) instantly — no submit button needed.
- 3Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Hardness Converter (HB ↔ HV ↔ UTS)?
- ✓Implements the standard formula — HV ≈ 1.05·HB; UTS(MPa) ≈ 3.45·HB (steels)
- ✓Reference cited on-page: ASTM E140 — hardness conversion tables
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Hardness Converter (HB ↔ HV ↔ UTS) use?+
It computes HV ≈ 1.05·HB; UTS(MPa) ≈ 3.45·HB (steels), per ASTM E140 — hardness conversion tables. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
The 3.45 factor is why a portable hardness tester estimates pipe strength in seconds. It drifts for cold-worked or austenitic materials — ±10% is the honest band. Note: Empirical correlations for carbon/low-alloy steels; not valid for aluminium, austenitic SS or castings.
Where do the material property defaults come from?+
Defaults are standard handbook values (ASM, manufacturer datasheets, the cited standard). Always substitute certified values from your material's test certificate for critical work.
Is the Hardness Converter (HB ↔ HV ↔ UTS) free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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