A gauge conversion chart can be used to determine the actual thickness of sheet metal in inches or millimeters.
Car sheet metal gauge.
For example 18 gauge steel according to a gauge conversion chart is 0 0478 inch or 1 214 millimeter.
This is known as the manufacturers standard.
As the gauge number increases the material thickness decreases.
Sheet metal thickness gauges for steel are based on a weight of 41 82 pounds per square foot per inch of thickness.
The larger the gauge number the thinner the metal.
Remember that you re always trading off weight against strength when choosing a gauge of sheetmetal to use.
In most of the world sheet metal thickness is consistently specified in millimeters.
A sheet metal gauge sometimes spelled gage indicates the standard thickness of sheet metal for a specific material.
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.
Many racing organizations will specify the minimum acceptable gauge for sheet metal in critical applications such as firewalls and protective enclosures.
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The equivalent thicknesses differ for each gauge size standard which were developed based on the weight of the sheet for a given material.
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Sheet metal gauge size chart gauge or gage sizes are numbers that indicate the thickness of a piece of sheet metal with a higher number referring to a thinner sheet.
Commonly used steel sheet metal ranges from 30 gauge to about 7 gauge.