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User:Thibdx/Materials properties proposal

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MechanicalEdit

Ultimate tensile strengthEdit

DescriptionMaterial proprety measuring the tensil strengh at break (20~25°C)
Representsmaterial (Q214609) > mechanical property of materials (Q5725005) > ultimate tensile strength (Q76005)
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), pressure (P2077), determination method (P459).
Allowed unitsN/mm² / Pa / MPa / Psi
Example 1SAE 316L stainless steel (Q28453931) → 250 to 300 N/mm²
Example 2stainless steel (Q172587) → 250 to 2000 N/mm²
Example 3beryllium (Q569) → 450 N/mm²
Sourcew:Ultimate tensile strength
Planned useCreating an infobox for materials

Motivation

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

Discussion

  •   Support, but temperature (P2076) should be a mandatory qualifier, property cannot be limited to room temperature only. Wostr (talk) 23:20, 12 July 2018 (UTC)
  •   Support ArthurPSmith (talk) 17:52, 13 July 2018 (UTC)
  •   Support David (talk) 09:18, 14 July 2018 (UTC)
  •   Support Dhx1 (talk) 15:50, 16 July 2018 (UTC)
  •   Support Djhé (talk) 06:34, 17 July 2018 (UTC)

@ديفيد عادل وهبة خليل 2, Wostr, Djhé, ArthurPSmith, Dhx1:   Done: ultimate tensile strength (P5479). − Pintoch (talk) 07:50, 19 July 2018 (UTC)

Young's modulusEdit

DescriptionMaterial proprety linking the elastic deformation to the yield strengh at ambient temperature (20~25°C)
Representsmaterial (Q214609) > mechanical property of materials (Q5725005) > Young's modulus (Q2091584)
Data typeQuantity
Template parameterThis proprety request is part of the project of creating an infobox for materials from the french Wikipedia : related discussion
DomainPhysical and mechanical property of all solid Materials
Allowed valuesAny number. Well defined materials have one value. Generic materials have a upper and lower bound. Qualifiers : temperature (P2076) (shall be mandatory), pressure (P2077), determination method (P459), Moisture absorption (not yet created).
Allowed unitsN/mm² / Pa / MPa / GPa / Psi / MPsi
Example 1SAE 316L stainless steel (Q28453931) → 200 000 N/mm²
Example 2SAE 304 stainless steel (Q3600978) → 200 000 N/mm²
Example 3molybdenum (Q1053) → 330 000 N/mm²
Example 4brass (Q39782) → 100 000 to 125 000 N/mm² > brass is a generic name for an alloy so that it depends what type of brass.
Sourcew:Young's modulus
Planned useCreating an infobox for materials on the french wiki (this is the first material proprety requested, others will be needed)

Motivation

This proprety request is part of the project of creating an infobox for materials from the french Wikipedia : related discussion. It is a first attemp on material proprety creation on Wikidata. Other material propreties will be proposed if a consensus is reached on this one. Thibdx (talk) 21:19, 11 July 2018 (UTC)

Discussion

  •   Support --Djhé (talk) 14:07, 12 July 2018 (UTC)
  •   Support David (talk) 14:57, 12 July 2018 (UTC)
  •   Support yes definitely - somehow I thought we already had this! ArthurPSmith (talk) 17:43, 12 July 2018 (UTC)
  •   Support, but this property should have temperature (P2076) as a mandatory qualifier; it cannot be limited to room temperature only. Maybe some other qualifiers should also be allowed? Wostr (talk) 23:15, 12 July 2018 (UTC)

Solutions regarding temperature :

  • We can consider that if the temperature is not specified, the value refers to room temperature. This is the common use.
  • We can add temperature as a mandatory qualifier and the norm used for the test as an optional qualifier. (optional because it is not easy to use).

Regards -- Thibdx (talk) 08:21, 13 July 2018 (UTC)

  • We have similar solution in pl.wiki regarding chemical compounds – if conditions are not specified then it's 25 Celsius/1000 hPa. I don't think this is the best approach here in WD. For the second, you can use determination method (P459). Wostr (talk) 12:29, 13 July 2018 (UTC)
determination method (P459) seems to be perfect.
On some datasheet the temperature is not specified. Then the user don't know since it depends on the country : w:Standard conditions for temperature and pressure. This is not really important except if the material is something like chocolate acutally. Anyway, It's a detail, most users are smart enough to put something between 20 and 25°C if there is only "room temperature". It can be a mandatory parameter if no one is against this. --Thibdx (talk) 15:25, 13 July 2018 (UTC)
If temperature is not specified then you can add temperature = somevalue. Polymers too, not only chocolate ;) Wostr (talk) 15:57, 13 July 2018 (UTC)
  •   Support Dhx1 (talk) 15:49, 16 July 2018 (UTC)

@Thibdx, ديفيد عادل وهبة خليل 2, Djhé, Wostr, ArthurPSmith, Dhx1:   Done: tensile modulus of elasticity (P5480). − Pintoch (talk) 07:53, 19 July 2018 (UTC)