400i 2016 5p piece

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DingDong
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400i 2016 5p piece

Post by DingDong » Tue Sep 25, 2018 5:50 pm

Hi all,

1st post and 1st detector, have bought a 2nd hand 400i and been doing some testing/familiarisation. Duracell batteries fitted 4 bars.

Tried a range of iron bits and coins, airtest, surface test and under a 5" pot of compost, most of the small objects under pot need 7 on sense, bigger coins ok at 6.

However main query is a 2016 5p piece giving a reading of 01 air and surface test, intermittently detectable at 5 inches under the pot, even on max sense.
Was using zero disc mode, When I notched out 1st pixel it was not beeped on surface test which seems to show displayed reading is correct, BTW I forgot to look at pixel indicator

WHAT ARE THEY MADE OF or have I got a dicky machine.

cheers

dingdong



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Re: 400i 2016 5p piece

Post by Allectus » Tue Sep 25, 2018 5:53 pm

"WHAT ARE THEY MADE OF "

Steel ;;z

A ;)

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Re: 400i 2016 5p piece

Post by mrix » Tue Sep 25, 2018 5:58 pm

A few of the modern coins now have a much higher steel content unfortunately :(

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Re: 400i 2016 5p piece

Post by Fusion » Tue Sep 25, 2018 6:09 pm

I think a bit of wikipedia research will enlighten you as to what current, and recently withdrawn coins are made of. If you're pursuing detecting as a hobby, it would seem worthwhile doing. There's also Tony Claytons site:
http://www.coins-of-the-uk.co.uk/

5p and 10p are now both made from nickel-plated steel. As nickel is ferromagnetic, like steel, the coins appear to most detectors as 'steel-plated steel'. So they unsurprisingly read in the 'iron' range.

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Re: 400i 2016 5p piece

Post by DingDong » Tue Sep 25, 2018 7:33 pm

thanks to all for the replies, yep I will read those links

ding dong

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Re: 400i 2016 5p piece

Post by edge1255 » Tue Sep 25, 2018 10:06 pm

When I do a bit of magnet fishing I can pickup 1p, 2p and recent 5p pieces. ;;z
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Re: 400i 2016 5p piece

Post by Fusion » Tue Sep 25, 2018 10:20 pm

The original threads discussing the new 5p/10p:
viewtopic.php?f=10&t=21134
viewtopic.php?f=10&t=25614

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Re: 400i 2016 5p piece

Post by Saffron » Tue Sep 25, 2018 10:37 pm

I was reading this a few days ago and some interesting stuff on there about British coins and the metals used
https://www.royalmint.com/corporate/circulating-coin/

also look here for other good bits
https://www.royalmint.com/corporate/cir ... edge-bank/

One thing that did surprise me on the list of coins produced in recent years was that some denominations have not been produced every year x;

Evan

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Re: 400i 2016 5p piece

Post by Fusion » Tue Sep 25, 2018 10:53 pm

It's mentioned in that Royal Mint link, but not many people realise the cupro-nickel 5p and 10p are actively being withdrawn from circulation. It's not just a simple case of "from now on they're steel", making new ones as the need arises ( loads are lost, end up abroad permanently, get put in jars/drawers etc) , they are melting down the 'expensive' cupro-nickel ones and turning them into new coins, like 50p's, or foreign coins.

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