GarySchmitz
Mitglied seit: 23 Jun. 2013
Beiträge: 11
Gesendet: 9 Sept. 2021, 17:53
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Gesendet: 9 Sept. 2021, 17:53
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This coin is shown to be “copper nickel clad nickel”, but it sticks to a magnet.
Why?
rsirian1
Mitglied seit: 20 Nov. 2020
Beiträge: 12952
Gesendet: 9 Sept. 2021, 18:02
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Gesendet: 9 Sept. 2021, 18:02
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Because nickel is highly magnetic.
Thema verschoben nach "Numismatic questions"
(ZacUK , 9 Sept. 2021, 18:35)
Idolenz
Katalog-Kurator
Mitglied seit: 13 Jul. 2013
Beiträge: 9583
Gesendet: 9 Sept. 2021, 18:46
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Bearbeitet: 9 Sept. 2021, 18:47
Gesendet: 9 Sept. 2021, 18:46
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Bearbeitet: 9 Sept. 2021, 18:47
Indeed they are out of Magnimat, 7% by mass pure nickel core with a Cu-Ni layers rolled onto on each side which is enough to make it attracted to a magnet.
GarySchmitz
Mitglied seit: 23 Jun. 2013
Beiträge: 11
Gesendet: 9 Sept. 2021, 22:00
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Gesendet: 9 Sept. 2021, 22:00
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Verweis : "Then why don't nickles stick to magnets?" Because nickel is highly magnetic.
BramVB
Katalog-Kurator
Mitglied seit: 17 Jul. 2016
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Gesendet: 9 Sept. 2021, 22:58
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Gesendet: 9 Sept. 2021, 22:58
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Verweis : "GarySchmitz"
Verweis : "Then why don't nickles stick to magnets?" Because nickel is highly magnetic. Because they are made of
copper-nickel (not nickel, as the nickname might suggest)
https://en.numista.com/catalogue/pieces44.html
Just call me Bram
No new swaps for the moment, still too many half-ongoing swaps to clean up!
GarySchmitz
Mitglied seit: 23 Jun. 2013
Beiträge: 11
Gesendet: 9 Sept. 2021, 23:02
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Gesendet: 9 Sept. 2021, 23:02
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Verweis : "BramVB"
Verweis : "GarySchmitz So you're saying alloys of nickel aren't magnetic?"
Verweis : "Then why don't nickles stick to magnets?" Because nickel is highly magnetic. Because they are made of copper-nickel (not nickel, as the nickname might suggest)
https://en.numista.com/catalogue/pieces44.html
rsirian1
Mitglied seit: 20 Nov. 2020
Beiträge: 12952
Gesendet: 10 Sept. 2021, 00:32
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Gesendet: 10 Sept. 2021, 00:32
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The nickel-copper alloys used for coins is 70% Cu / 30% Ni. It is non-magnetic and as you learned in one of your prior posts has a greyish color.
Idolenz
Katalog-Kurator
Mitglied seit: 13 Jul. 2013
Beiträge: 9583
Gesendet: 10 Sept. 2021, 02:31
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Bearbeitet: 10 Sept. 2021, 02:31
Gesendet: 10 Sept. 2021, 02:31
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Bearbeitet: 10 Sept. 2021, 02:31
If it where a homogenous Cu-Ni alloy you would need at least 56 percent nickel before the alloy shows any ferromagnetic properties at ordinary temperatures.
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