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Rockwell C and Vickers Hardness Estimate — result sheet
Estimate a Rockwell C or Vickers hardness value for the ASTM non-austenitic-steel equation scope, with the material and validity limits kept visible.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: For the supported non-austenitic-steel equation, HRC = 31.49 + 0.0796683HV − 0.0000355432HV² − 6728.16/HV; the reverse direction solves this equation numerically over a bounded range.
Hardness conversions are material- and scale-specific approximations, not universal unit conversions. This page limits the calculation to the stated non-austenitic-steel relationship and exposes the direction; it must not be used to certify a material, replace a test, or silently convert across an unsupported alloy or scale.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Conversion direction — 2 choices
- Input hardness value — HV or HRC; minimum 100; maximum 1000
Worked example
| Input | Value |
|---|---|
| Conversion direction | hv-to-hrc |
| Input hardness value | 550 |
The supported equation estimates approximately 52.3 HRC from 550 HV; the result remains an approximate comparison, not a test certificate.
Assumptions and limits
- The supported material scope is homogeneous non-austenitic steel within the equation’s applicable range.
- Vickers input is treated as HV and Rockwell input as HRC; the selected direction controls the interpretation.
- The reported conversion is approximate and rounded for display, not a specification value.
- Different alloys, heat treatments, surface conditions, thicknesses, loads, and test methods can change the relationship.
- The calculator does not cover Rockwell B, superficial scales, Brinell, Knoop, Leeb, tensile strength, or other ASTM tables.
- A converted value should not replace direct testing when a material specification or acceptance decision matters.
- Confirm the current standard, test method, and material-specific table with the responsible laboratory or engineer.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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