How much is a 1993 d steel wheat penny worth?

The only steel cents were struck in 1943, not 1993.

The last wheat cents were struck in 1958.

If your coin is dated 1943, it's worth about a quarter.

If it's dated 1993 it's a Lincoln Memorial cent.

If it's 1993 and is silver colored you'll need to have it inspected in person by a dealer to determine if it's been plated (no extra value) or is missing the copper coating so its zinc core shows through (a mint error worth several dollars).