en

hardness

1 substantive

Terminological databases

Materjalitehnika terminibaas

ID 671293 Last modified 15.07.2025
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Domain strength of materialsproduct quality & testing of productstesting methods
  • materjali võime vastu panna pinna indenteerimisele
    Good to know
    • Puudub absoluutne kõvadusskaala. Kõvaduse väljendamiseks kvantitatiivselt on eri-tüüpi kõvaduskatsete korral (nt Brinelli, Rockwelli, Vickersi jt indenteerimiskõvadused) oma määratletud skaala.
  • a measure of the resistance of a material to surface indentation or abrasion
    Good to know
    • There is no absolute scale for hardness. Therefore, to express hardness quantitatively, each type of test has its own scale of arbitrarily defined hardness. Indentation hardness can be measured by Brinell, Rockwell, Vickers, Knoop, and scleroscope hardess tests.
kõvadus
hardness

Metroloogia terminibaas

ID 583166 Last modified 15.04.2026
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Domain Standardisation - Metrology
kõvadus preferred
pinnakõvadus variant
hardness preferred
solidness
  • materjali võime vastu panna kohalikule plastsele deformatsioonile
  • signifies, in general resistance to cutting, indendation and/or abrasion, and is actually measured by determing the resistance to indendation definitsioon
kõvadus preferred
Usage examples
  • Kõvadus, kui materjali vastupanuvõime seostub ülikõvade materjalidega, nagu teemant, boorkarbiid, muu keraamika ja kõvade metallidega kuni pehmete metallideni ning plastide ja pehmete kudedega.
pinnakõvadus variant
hardness preferred
Usage examples
  • Hardness, when the resistance of a material is related to extremely hard materials such as diamond, boron carbide, other ceramics and hard metals to soft metals and plastics and soft tissues.
solidness
surface hardness variant

Metroloogia terminibaas

ID 1142787 Last modified 15.04.2026
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Domain Standardisation - Metrologyunits of measurement
leelismudmetallide sisaldus
kalkus former
karedus former
sum of alkaline earth
hardness former
  • termin "kalkus" on vee puhul kaasajal asendatud terminiga "leelismuldmetallide sisaldus"
  • former term "hardness" has been replaced by the term "sum of alkaline earth"
leelismudmetallide sisaldus
Usage examples
  • Endised kalkuse ühikud 0d ja mval/l on asendatud leelismuldmetallide sisalduse ühikutega mmol/l, mol/m3 ja mg/l seosest 1 mmol/l = 1 mol/m3, mis vastab 2 mval/l, andes 56 mg CaO/l.
kalkus former
karedus former
sum of alkaline earth
Usage examples
  • The former units for hardness 0d and mval/l have been replaced by units for the sum of alkaline earth mmol/l, mol/m3 and mg/l (1 mmol/l = 1 mol/m3 corresponding to 2 mval/l that will give 56 mg CaO/l).
hardness former

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