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 Replies: 9 / Views: 2,629 |
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Valued Member
Canada
387 Posts |
As part of its alloy recovery program the RCM indicates recovering nickel and cupronickel. What coins does cupronickel come from? I noticed that prior to 2000 or so there were many coins with 99%+ nickel but which coins had cupronickel. I searched the RCM website and it would seem to me that the only coins with cupronickel would be the toonies. The inner core is listed as 92% copper, 6% aluminum, 2% nickel. The loonie has a bronze plating which would technically be copper and tin. The penny has copper but no nickel. Any ideas? |
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Moderator
 Australia
16845 Posts |
The Canadian 5 cent coin was made of cupronickel (which, in coinage, is traditionally 75% copper, 25% nickel) from 1982 to 2006 - though from 1999, some 5 cent coins began to be made of plated steel.
So yes, ironically, for over a decade the coin known as the "nickel" was the only silvery-coloured coin in circulation not actually made of nickel.
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
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Pillar of the Community
 Canada
9865 Posts |
All Canadian 5cents were cupronickel from 1982-1998.
From 1999-2001 both cupronickel and plated steel coins were issued in each year,though the 1999p(plated)was for testing only.
From 2002-2005 5cents were struck in plated steel only.
In 2006 the cupronickel coin made its last appearance,and accounted for about 1/4 of the mintage for that year.
The plated steel coins will have a "p" or mint logo beneath the Queen's portrait.The cupronickel coins have no such marking.
"Dipping" is not considered cleaning...
-from PCGS website
Edited by DBM
06/30/2013 01:49 am
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Valued Member
 Canada
387 Posts |
Quote:
All Canadian 5cents were cupronickel from 1982-1998.
From 1999-2001 both cupronickel and plated steel coins were issued in each year,though the 1999p(plated)was for testing only.
From 2002-2005 5cents were struck in plated steel only.
In 2006 the cupronickel coin made its last appearance,and accounted for about 1/4 of the mintage for that year. Quote:
The Canadian 5 cent coin was made of cupronickel (which, in coinage, is traditionally 75% copper, 25% nickel) from 1982 to 2006 - though from 1999, some 5 cent coins began to be made of plated steel. Thx for providing information about cupro-nickel. This is rather interesting. I am finding that even on a simple matter as identifying the specification of coins there is discrepancy. According to the official RCM website the following are the specifications of nickel from 1982 to present http://www.mint.ca/store/mint/learn...Ud4g4tLMDTo:1982 - 1999 Composition: 75% copper, 25% nickel Weight (g): 4.6 Diameter (mm): 21.2 Thickness (mm): 1.76 2000 - present Composition: 94.5% steel, 3.5% copper, 2% nickel plating Weight (g): 3.95 Diameter (mm): 21.2 Thickness (mm): 1.76 According to the Charlton Catalogue: The cupro nickel variety are listed as: All coins from 1982-1998 Non-P coins from 1999-2001 Non-P coins of 2006. So DBM's information is similar to the one in Charlton Catalogue but does not coincide with the information on RCM website. How does one verify this for sure? Thx |
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Bedrock of the Community
Australia
21788 Posts |
Interesting about the plating.
Apparently, the copper must be an under plating to extend the life of nickel plating. I have seen nickel plating peel off a steel surface. Considering the hard life that circulating coins have to withstand, I guess that a pre plating in copper was the way to go.
Copper will not alloy with iron. It is a bit like dissolving oil in water. An alloy is really a metallic solid solution at normal temperatures.
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Pillar of the Community
Canada
9865 Posts |
Quote:...does not coincide with the information on RCM website. How does one verify this for sure? Check the mint's annual reports. http://www.mint.ca/store/dyn/PDFs/RCM_AR06.pdfYou'll find the answers there.Whoever wrote the specifications on the RCM site does not read the reports,and the 5ยข coin isn`t the only one they`ve got wrong. "Dipping" is not considered cleaning...
-from PCGS website
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Moderator
Canada
10459 Posts |
Quote:
Apparently, the copper must be an under plating to extend the life of nickel plating. Yes, sort of. The steel coins are first plated in a thin layer of nickel, then a thicker layer of copper, and then a layer of nickel. You can often see elements of the copper plating in heavily scratched plated coins. "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Pillar of the Community
United Kingdom
837 Posts |
Thats interesting  because over here they have started to issue nickel plated steel coins (5p & 10p) but ours dont have the copper plating below the outer nickel plating .... |
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Valued Member
Canada
387 Posts |
Quote:
Thats interesting because over here they have started to issue nickel plated steel coins (5p & 10p) but ours dont have the copper plating below the outer nickel plating .... The Royal Canadian Mint is using a proprietary system of plating called Multi ply plated steel (MPPS). The mint is really proud about it and is selling this technology to manufacture coins for other countries. |
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Valued Member
Canada
387 Posts |
Quote:
Check the mint's annual reports. Thx DBM. The information is helpful. So that raises another set of question: Is there any particular reason given for production of the cupronickel 5 cents? Also 2006 was the year when the RCM logo came about on the coins. I did not find information in the annual report that distinguishes between coins with the logo and without the logo. However looking at the Charlton Catalogue it appears that the cupronickel 5 cents were all without any logo (no P of course, no RCM logo)and the of the plated nickels there were some with P and some with RCM logo. Is this embedded in some other reports of RCM? |
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Replies: 9 / Views: 2,629 |
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Posted 06/30/2013 01:42 am
