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HR

3 abbreviation

Terminological databases

Materjalitehnika terminibaas

ID 672905 Last modified 03.07.2026
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Domain strength of materials
Rockwell hardness number
HR
  • materjali kõvadust iseloomustav näitaja, kasutades Rockwelli meetodit (A skaala järgi HRA, B skaala järgi HRB, C skaala järgi HRC jne) (vt HRA, HRB, HRC)
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    • Arv, mis on tuletatud indentorile mõjuva fikseeritud põhijõu kasvust põhjustatud indenteerimisjälje suurenemisest peale põhijõu kõrvaldamist ja tagasipöördumist eeljõule.
  • hardness determined by Rockwell hardness test - a method of determining the hardness of materials by indenting them with hard steel ball or diamond cone; the most common hardness scales are A (HRA), B (HRB) and C (HRC) (see: HRA, HRB, HRC)
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    • A number derived from the net increase in the depth of impression as the load on the indenter is increased from a fixed minor load to a major load and then returned to the minor load.
Rockwelli kõvadusarv
Rockwell hardness number
HR abbreviation

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