Pound coin alloy?

[blakeyboy]

I've just noticed that the bi-metal one pound coin is slightly magnetic, whereas the two pound coins I've got lying around aren't....

any idea on what in the alloy causes this?

Any members here who have magnetic knowledge as their domain? 😉 

 

 

[Paddy]

I had not noticed that before, but just checked and you are correct.

I checked the specification of the pound on the Royal Mint website: 

https://www.royalmint.com/discover/uk-coins/coin-design-and-specifications/one-pound-coin/

The centre is Nickel plated brass alloy. Pure Nickel is magnetic, so I guess this is what is being attracted to the magnets. Copper-Nickel alloys are not magnetic.

[VickySilver]

LOL, must be bad weather up your way....I played with some nickel coins previously as there was some debate about the 1923 & 1924 pattern 3d and 1/- coins being only nickel (vs. copper-nickel) alloy. I suppose there is a threshold point as which increasing the copper in the alloy deters the magnetic property....

[blakeyboy]

On 2/15/2021 at 11:09 AM, blakeyboy said:

 

 

Any members here who have magnetic knowledge as their domain? 😉 

 

 

Domain??  Geddit??

 

My science puns are wasted here.......

 

Or are they?.......( cue sound of punsters sharpening pencils...)

 

[Bronze & Copper Collector]

1 hour ago, blakeyboy said:

Domain??  Geddit??

 

My science puns are wasted here.......

 

Or are they?.......( cue sound of punsters sharpening pencils...)

 

Apparently you are POLES apart....

[blakeyboy]

And so it begins.....:)

[Bronze & Copper Collector]

2 hours ago, blakeyboy said:

And so it begins.....:)

That's essentially the NORTH & SOUTH of it....

[blakeyboy]

22 hours ago, VickySilver said:

LOL, must be bad weather up your way....

Maybe he had the time to do this because it was  it was Ferrous Beuller's day off.....