Welcome Mike. All Cents minted in 1943 (save for a couple really rare ones) were made with steel. Yours is well loved and shows corrosion. It's worth maybe 2 cents, but a fun historical piece.
@Mike the plumber The one you should be on the lookout for is the 1944 Steel. It's considered a transitional error. Almost impossible to find. I want to share the following webpage with you - http://lincolncentresource.com/Rare/1943CopperCents.html