I have but I have never worn or seen a military duty belt made from it. brass/bronze, steel, and plastic is all that I have ever seen.
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Attachment 109222
Most of the ones pictured in this thread, including that one are die-cast zinc, which is often called pot-metal. - Bob
I would call the metal on my belt pot-metal. That was the impression it gave me. It's not steel. Seems in good shape other than the paint chipping off.
Because of the conversation, I took a closer look at the female and male latch on yours and although it looks nearly the same, it is not like the one I had. Your is much more square on the female connector. I found a picture on eBAY of the type I was issued in the 70's, I put arrows where these stupid things would break. It not pot metal, one of the breakpoints was at the welded joint. Pot metal is not welded.
Attachment 109223
Because of the conversation, I took a closer look at the female and male latch on yours and although it looks nearly the same, it is not like the one I had. Your is much more square on the female connector. I found a picture of the one I had in the 70's, I put arrows where these stupid things would break. It not pot metal, one of the breakpoints was at the welded joint. Pot metal is not welded and it is not painted
Attachment 109223
That one does look different - wonder if it's an M1956? The keepers are different than mine, too. Does the eBay description give any details? Thanks! - Bob
It may seem obvious but the way to see if a metal is steel/iron is to test with a magnet.