Looking for the Conductivity of 10K,14K,18K, and 22K Gold?

[Anonymous]

It was easy to find a Conductivity Chart that listed the Conductivity of Pure Gold but I am having a hard time finding the values for gold that is alloyed with other metals used for making gold jewelry. I remember reading somewhere that when gold is alloyed with other metals it's conductivity is reduced which explains why many gold rings read in the Foil/Nickel area on TID Machines instead of up near penny where they would read if they were made of pure gold. Still I would like to find out the actual values if possible. Any help would be appreciated!!!!
Thanks
HH
Beachcomber

 

[Anonymous]

Hi Beachcomber,
Alloying even a few percent of other metals causes the conductivity of gold to drop dramatically. Even if the other metal is a good conductor, like silver. I haven't seen any published values for the different alloys either. I have a conductivity meter which gives a reading as a percentage of that of annealed copper. A 9K ring gives a reading of 18%. Unfortunately the object has to have a surface area of about a square centimeter, otherwise you do not get enough signal to read. This is a very wide ring, so it can be done. No other rings I have work. Great for coins though, a nickel reads 5.3%
Eric.

 

[Anonymous]

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