2010 10 Fils Bahrain Magnetic? - Coin Community Forum

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Author	Replies: 8 / Views: 1,289
flippy Pillar of the Community Australia 1874 Posts	Posted 07/04/2013 8:48 pm I have a 2010 10 Fils from Bahrain which is magnetic. All the websites I can find say it is brass, but mine clearly sticks to a magnet. Does anyone have any ideas why? Report this Post to the Staff

Sap Moderator Australia 16827 Posts	Posted 07/04/2013 11:06 pm The logical answer is that sometime between 2004 and 2010, they started making them out of plated steel instead of brass. But I haven't found any documentation to support this hypothesis. Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis Report this Post to the Staff
flippy Pillar of the Community Australia 1874 Posts	Posted 07/04/2013 11:43 pm Thanks Sap I will try to trackdown some more to look at. Report this Post to the Staff
flippy Pillar of the Community Australia 1874 Posts	Posted 07/05/2013 12:06 am I just found a few more to examine and the 2009s are brass and the 2010s are magnetic. I think Brass plated Steel. Edited by flippy 07/05/2013 12:07 am Report this Post to the Staff
thai-vic Pillar of the Community Thailand 1509 Posts	Posted 07/05/2013 04:05 am The magnetic 5 and 10 fils with new calligraphy were reported here and seem to have started in 2009 along with the other denominations. http://worldcoinnews.blogspot.com/s...abel/bahrain Report this Post to the Staff
flippy Pillar of the Community Australia 1874 Posts	Posted 07/05/2013 05:07 am Thankyou for your Sap and thai-vic. Report this Post to the Staff
wonghinghi Pillar of the Community Hong Kong 1270 Posts	Posted 07/05/2013 10:33 am Hello, I am a bit confused, though I know nickel is a ferromagnetic substance, I can't stick any of the HK coins that are made with Cu-Ni with my newly bought neodymium. But this magnet can show the diamagnetism property on silver coin. Can it really stick nickel? Can anyone confirm or deny my query by your experience? My newly bought neodymium Report this Post to the Staff
Sap Moderator Australia 16827 Posts	Posted 07/05/2013 12:16 pm Alloys are not necessarily the logical summation of their elemental components. Pure nickel is ferromagnetic at room temperature, or at least, it can be. Copper is not. Mix them together and you don't automatically obtain a slightly magnetic alloy; the properties of the alloy are often completely different. Cupronickel coinage alloy (75:25) is neither ferromagnetic or paramagnetic at room temperature; it won't stick to a magnet. Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis Report this Post to the Staff
wonghinghi Pillar of the Community Hong Kong 1270 Posts	Posted 07/05/2013 7:03 pm Sap, thank you very much to solve my query. Report this Post to the Staff
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