Wikidata:Property proposal/Hardness

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hardness[edit]

Originally proposed at Wikidata:Property proposal/Natural science

   Done: hardness (P5483) (Talk and documentation)
DescriptionMeasure of how resistant solid matter is to various kinds of permanent shape change when a force is applied
Representsmaterial (Q214609) > mechanical property (Q5725005) > hardness (Q3236003)
Data typeQuantity
Template parameterThis proprety request is part of the project of creating an infobox for materials
DomainMechanical property of all solid Materials
Allowed valuesAny number. Since it depend on parameters such as thermic treatment, most materials will an have a upper and lower bound. Qualifiers : temperature (P2076) (shall be mandatory), under pressure (P2077), determination method (P459).
Allowed unitsHV, HRC, HRB, µHV, HB, HLD, HK, Shore A, Shore B... There is a lot of measuring methods an each have it's own unit. The use of a method over another depends on the hardness level and the traditions for this type of material.
Example 1SAE 316L stainless steel (Q28453931) → 70 HRB
Example 2stainless steel (Q172587) → 15 to 65 HRC
Example 3Polyamide 11 (Q7226130) → 70 Shore D
Sourcew:Hardness
Planned useCreating an infobox for materials

Motivation

This proprety request is part of the project of creating an infobox for materials.

Discussion

The main difficulty with Hardness is that there is a bunch of measuring methods an each have it's own unit. The use of a method over another depends on the hardness level and the traditions for this type of material. It can be handled quite well using the datatype quantity and the qualifier determination method (P459). Since the conversion between the different hardness tests is difficult (ref : w:Hardness comparison), it could be interesting to enter several values for a single material. -- Thibdx (talk) 17:26, 15 July 2018 (UTC)[reply]

@Thibdx, ديفيد عادل وهبة خليل 2, Djhé, Wostr, ArthurPSmith, Dhx1: ✓ Done: hardness (P5483). − Pintoch (talk) 07:57, 19 July 2018 (UTC)[reply]