AT&T Solder Alloy

[Vince from MO]

I found a 5 lb spool of this at a yard sale. There are no other markings that I could see. Anyone know what it might be? It is approx. 3/16 - 1/4 " in diameter. Just wondering if it would be good in bullit metal.

Thanks,
Vince

[Uncle Grinch]

If it's like my two spools, it's soft rosin core solder that will work for black powder as is or add Lino to harden the alloy.

[Vince from MO]

Uncle Grinch,

Does it have any tin in it or is it pure lead?

Vince

[imashooter2]

Spools were probably 50-50 solder.

[runfiverun]

I have seen some solders that were 5% tin. or 20-1.
if there is a number like 421-3455-B on top of the roll you might be able to track that down and find out the mixture.

[6bg6ga]

It could be about anything. As mentioned the number on the spool will always serve to track down the mixture. Several things are always available on a spool one of which is the diameter and the other is the mix which most of the time is spelled out like 93-7 or 60-40.