Can't forge weld a master lock.

[HondoWalker]

Had a broken lock and saw all those layers that were riveted together and wondered if they would forge weld into a usable piece of metal and no, it wouldn't. It was a waste of time. Well that's how we learn. Right?

[Irondragon Forge ClayWorks]

Probably because the Master locks I have are galvanized and the internals are brass.

[ThomasPowers]

If you take a file and file off the rivet heads you should be able to drive them through the body and end up with the pile of plates to work with. You should then be able to clean any coating of the plates and work them in the forge afterwards.  

(I've done the rivet removal before to remove an abandoned lock from a chain.)

[BillyBones]

I have always heard that the standard Master lock is good for keeping honest people honest but beyond that pretty much just decoration. I have busted a Master lock open with just a claw hammer. 

[Jaegers Forge and Foundry]

you could melt away all the brass with a crucible or a torch and it would leave just the steel (or other stuff with a higher melting point then brass

I've done this to collect brass from a door handle