Replies

To: PIF

There is also a way to harden copper such that it is harder than steel

That is not the case.

25 posted on 12/10/2019 7:51:48 AM PST by GingisK

To: GingisK

Yes it is, but as I have to go to an appointment, I’m unable to give you the reference - but it is available with a search.

26 posted on 12/10/2019 7:56:52 AM PST by PIF (They came for me and mine ... now it is your turn ...)

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794