Smelly alloy. Metals mix melting. Carbide

I've collected a lot of metals from spills and faults during melting. These are aluminum, bronze, brass, copper. I was really surprise with the result. I've got some grey colour alloy with weird smell. Well, we know that metals shouldn't have any smell, So, what's that?

Видео Smelly alloy. Metals mix melting. Carbide канала Dural Metalurg