Hi,

About 7 years ago, I purchased some small copper sheets on ebay. They are about 3/32" thick by 2" x 3". I've used them for various small projects around the house and for some keychains, knife handles etc.

I read about the dangers of process BeCu alloys and as a hobbyist, I was not aware of this metal. I have no way of contacting the seller at this point to find out what the alloy of copper I have could be.

Is there a way to distinguish "normal" copper from BeCu alloys? This copper gets very soft when annealed, it gets noticeably harder from working but is easily annealed again by heating red hot and then cold water quenching it.

Thanks.

Holiday