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What are the magnetic properties of the new coins?
All the metals used in the new coins are magnetic apart from the copper plating. The magnetic materials used are called “soft magnetic”. This means they do not hold a magnetic field once a magnetising force has been removed. The new coins will not have any affect on credit card magnetic strips in people’s wallets. In technical terms, this gives them a very low “Remanence” and “Retentivity” figure with a very narrow “Hysteresis” loop.
Our old “silver” coins are made of cupro-nickel (75 percent copper and 25 percent nickel).while the New ones are plated steel,
It’s deliberate – they all have their own “magnetic signature”. I take that to mean that they’ll respond to different magnetic force strengths – handy for vending machines, you just a line of magnets to test which is which.