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 Replies: 16 / Views: 4,881 |
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New Member
United States
4 Posts |
hello, I have a bit of a mystery. I have a 1945 Nickel (Big D above the Capital). It seems uncirculated and shiny - almost a bit too shiny like it has been plated and has some remnants of tape or glue residue on the back but the mystery is that it is magnetic. My rare earth magnet attracts to it as if it is a steel penny. Any thoughts?   |
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Valued Member
United States
477 Posts |
Is that some kind of plating flaking off on the reverse?
Rick
EDIT: I reread the description, tape residue.
Edited by shootnstarz
08/20/2013 7:42 pm
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Valued Member
United States
395 Posts |
Rim and outer edge look funny.
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Pillar of the Community
United States
3345 Posts |
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Pillar of the Community
United States
997 Posts |
The obverse looks very worn but overly clean. If it is real then it was probably washed somehow or plated. If it was cast the mother coin was well work on the portrait.
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Pillar of the Community
United States
1109 Posts |
Possibly was buffed to an unnatural shine.
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Bedrock of the Community
United States
17884 Posts |
The powerful magnetic field from a rare earth magnet is enough to attract the manganese in the alloy.
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Pillar of the Community
United States
2757 Posts |
put it in some acetone to get rid of the tape residue.
get the weight to make sure it is real.
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Pillar of the Community
United States
1053 Posts |
Is that tape or discoloration. ?
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New Member
 United States
4 Posts |
Thanks for all the replies. I just found them all in my spam folder - I will have to fix that. "Is that tape or discoloration. ?" - it is some sort of tape or glue residue on the back "The powerful magnetic field from a rare earth magnet is enough to attract the manganese in the alloy." - I have 3 other War Nickels and the same magnet does not attract to the at all "see how much it wieghs" - It weighs 5.1 grams and my 3 other War Nickels weigh 4.9 gr, 5.0 g and 5.0 g "put it in some acetone to get rid of the tape residue." I did not want to clean it until I fould out more about it. |
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Pillar of the Community
917 Posts |
I'm going to call plated.
Also acetone is not cleaning..
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Pillar of the Community
United States
648 Posts |
Conder101 is correct Manganese at 9% is lightly magnetic in the wartime alloy. A single neodymium magnet is usually not powerful enough to pick 1 up. So your test with other nickles is the norm. I suspect that the alloy mix the Mint used that day was off. or your other coins are hennings! We use a manganese, silver, copper, (war nickle) test for power of completed arrays. In comparing magnets a 15# pound pick up retriever neo. does not have the strength to pick one up, but can move it around. Our least powerful array, at a minimum has to be able to pick up and hold one. Many off metal counterfeits have ferromagnetic properties that we have to screen out before testing in our inductive signature scanner. If you want to sell the high magnetic nickle I would be interested, as an error coin! edit for   Edited by tokenmast
08/24/2013 11:42 am
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Pillar of the Community
United States
5825 Posts |
Nickel is also slightly magnetic.
If I understand correctly rare earth magnets are VERY powerful and should attract nickel coins.
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Pillar of the Community
United States
648 Posts |
sounds logical but
Cupronickel 75% copper 25% nickel is not attracted to the very powerful magnets we use.
However pure nickel bullion and coins are.
Can anyone tell me exactly why?
Edited by tokenmast
08/26/2013 11:46 pm
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Pillar of the Community
United States
621 Posts |
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Bedrock of the Community
United States
17884 Posts |
Pure nickel is actually very STRONGLY magnetic. But in an alloy it usually loses most of its magnetic properties once the percentage of the other metal exceeds about 10%.
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Replies: 16 / Views: 4,881 |
Posted 08/20/2013 7:57 pm
