Wikidata:Property proposal/Hardness
hardness[edit]
Originally proposed at Wikidata:Property proposal/Natural science
Description | Measure of how resistant solid matter is to various kinds of permanent shape change when a force is applied |
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Represents | material (Q214609) > mechanical property (Q5725005) > hardness (Q3236003) |
Data type | Quantity |
Template parameter | This proprety request is part of the project of creating an infobox for materials |
Domain | Mechanical property of all solid Materials |
Allowed values | Any 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 units | HV, 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 1 | SAE 316L stainless steel (Q28453931) → 70 HRB |
Example 2 | stainless steel (Q172587) → 15 to 65 HRC |
Example 3 | Polyamide 11 (Q7226130) → 70 Shore D |
Source | w:Hardness |
Planned use | Creating 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)
- Support David (talk) 11:14, 16 July 2018 (UTC)
- Support Dhx1 (talk) 15:47, 16 July 2018 (UTC)
- Support Wikidata units were designed for this, I think this is a great example of how one property can be very versatile. ArthurPSmith (talk) 17:26, 16 July 2018 (UTC)
- SupportJust a observation, the HV hardness needs an additional parameter to be in agreement with the ISO standard. This is the load applied in kiloforce. For example: 200 HV10 (with a load of 10 [kg]) Djhé (talk) 06:31, 17 July 2018 (UTC)
- Comment maybe Mohs' hardness (P1088) could be replaced by this one? Wostr (talk) 21:07, 18 July 2018 (UTC)
@Thibdx, ديفيد عادل وهبة خليل 2, Djhé, Wostr, ArthurPSmith, Dhx1: Done: hardness (P5483). − Pintoch (talk) 07:57, 19 July 2018 (UTC)