Hardness Converter Calculator

Convert between Rockwell, Brinell, Vickers, and Shore hardness scales with approximate tensile strength.

Approximate Tensile Strength
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MPa (ksi)
Rockwell C (HRC)
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Rockwell B (HRB)
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Vickers (HV)
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Brinell (HB)
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Typical Application
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Hardness Scales Explained

  • Rockwell C (HRC): 20-70 range. For hardened steels, tool steels. Diamond cone indenter, 150 kg load.
  • Rockwell B (HRB): 0-100 range. For softer metals, annealed steel, aluminum. 1/16" ball, 100 kg load.
  • Vickers (HV): Wide range (50-3000+). Diamond pyramid. Precise for thin sections and case depth.
  • Brinell (HB): Common for castings and forgings. 10mm carbide ball, 3000 kg load for steel.

Note: Conversions are approximate. Exact equivalence between scales is impossible because they measure different properties. ASTM E140 provides standard conversion tables.

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