As the gauge number increases the material thickness decreases.
Carbon steel sheet metal thickness.
A sheet metal gauge sometimes spelled gage indicates the standard thickness of sheet metal for a specific material.
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For the purpose of securing uniformity the following is established as the only standard gauge for sheet and plate iron and steel in the united states of america namely.
For example 18 gauge steel according to a gauge conversion chart is 0 0478 inch or 1 214 millimeter.
A gauge conversion chart can be used to determine the actual thickness of sheet metal in inches or millimeters.
Remove layers with a utility knife until you get the thickness you need.
Number of gauge approximate thickness in fractions of an inch.