#4 Babbitt Federated Castomatic alloy?

Anybody have info on this? I've read a couple things saying its a type of hardware/hammer alloy but it doesn't seem very hard.

Thanks

Babbitt metal is primarily used for poured bearings on shafts in machinery.
Years ago a harder grade then yours was used for main & rod bearings in car engines.

#4 is composed of 84-86% lead, 1-2% Tin, and 12-14% antimony.

That makes it very similar to Linotype alloy which makes very fine hard cast bullets.
It would be worth a try for casting rifle or magnum handgun bullets.

rc

It would be uneeded hardness as it sits. I would mix it with pure or softer range lead to get it down to 3-5%antimony and 2-3%tin.Plenty hard for magnum handgun and even many rifle velocities. Water drop for higher performance rifle load.

Thanks guys, picked it up at the scrap yard today and looking to sell it; just needed to see what it was first.

I passed up the chance to get a couple other ingots (not this shape and not same stuff). They were quite a bit harder and not marked so I didn't buy them. They were long and heavy, one was broken and it looked like a brittle fracture, not a ductile failure like lead would give (hey, I actually used some information from my materials science class!).