Powder metallurgy as Composition of the Kyiv Metro Token [solved]

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This message aims at: requesting the modification of a coin in the catalogue

Status: Done
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omant

Joined: 8 Jul 2019
Posts: 42

Posted: 16 Aug 2021, 09:16 #

https://en.numista.com/catalogue/exonumia35046.html
The token of the Kyiv metro was made using powder metallurgy technology. "Brass plated steel (Magnetic)" is the wrong value for the Composition field. It is better to correct it, but "powder metallurgy" is not in the list of possible options. Which value is better to use?

Grinya Catalogue referee

Joined: 8 May 2017
Posts: 1706

Posted: 16 Aug 2021, 09:56 #
Edited: 16 Aug 2021, 09:56

They were made on the powder metallurgy factory. Powder technology is not a composition - this is a method of production.
The composition is copper based metal (I'm also not sure that Brass plated steel is correct)

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omant

Joined: 8 Jul 2019
Posts: 42

Posted: 17 Aug 2021, 02:32 #

I once talked to the manufacturer of these tokens. Composition is a mix of powders of different metals, copper is among them and iron is among them - it is magnetic. Some mixes contained more one metal, some contained more other - so they are all slightly different weights and colors.

Status changed to Done (Jarcek, 28 Jun 2022, 12:42)

Jarcek Numista team