The equivalent thicknesses differ for each gauge size standard which were developed based on the weight of the sheet for a given material.
Carbon steel sheet metal gauges.
Gauge and weight chart for sheet steel galvanized steel stainless steel aluminum and strip tubing sponsored links wire gauge is a measure for the size of a wire either in diameter or in cross sectional area.
For other materials such as aluminum and brass the thicknesses will be different.
500 18 0 047 2 000 20 0 035 1 500 22 0 029 1 250 24 0 023 1 000 26 0 017 0 750 28 0 014 0 625 30 0 012 0 500 galvanized sheet thickness gauge thickness in.
Sheet metal thickness gauges for steel are based on a weight of 41 82 pounds per square foot per inch of thickness.
When working with sheet metal it is common for the term gauge to be used someone unfamiliar with the gauge system may not understand what is meant by 18 gauge steel for example.
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As the gauge number increases the material thickness decreases.
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Carbon steel sheet thickness gauge thickness in wgt.