Brianstick with all due respect i find it hard to believe that sheet metal from a 1974 american made automobile has 18 ga.
Car body sheet metal thickness.
0239 range depending on the panel.
0299 and 24 ga.
The reason i say this is that i have rebuilt two older vehicles a 55 chevy and a 67 el camino and have found the sheet metal to be in the 22 ga.
Mild steel is 1449 cr4 grade.
In galvanized steel it is 0 0217 inches.
There is also 19ga available but harder to get and more expensive.
Whether you re pounding a dented body panel or fabricating an entire custom interior for a race car you re bound to work with sheetmetal in the automotive world.
Aluminium sheets are also available.
1 16 of over 2 000 results for auto body sheet metal eastwood 7 pieces 20 gauge auto body repair patch panels kit 20 gauge aluminized steel sheet metal corrosion resistant 4 0 out of 5 stars 10.
20 gauge became common in more recent times and this meant 0 0359 inch thick metal still a lot to work with in bumping and metal finishing.
Now though we can supply you with smaller sheets of steel to suit your smaller projects.
Automotive sheet metal once ran in the range of 18 gauge which was 48 thousandths of an inch thick actually 0 0478 inch.
Twenty six gauge sheet metal in standard steel is 0 0179 inches thick.
The thickness of sheet metal depends on the material from which it is made.
Be aware that there are many differences in both thickness and hardness in the cold rolled sheet available today.