Gauges are neither standard nor metric and the values are independent of those measurement systems.
Imperial sheet metal thickness.
Standard metric sheet in mm.
Wire conductor sizes are also measured in gauge and are equivalent to the non ferrous thicknesses listed below but we have an article specific to wire gauge.
Gauges are used to specify the thickness of a sheet metal.
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Imperial equivalent in mm.
Metal sheet thickness is measured in gauge.
As the gauge number increases the material thickness decreases.
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The corresponding galvanized steel thickness is 0 0366 inches 0 93mm and the corresponding aluminum thickness is 0 028 inches 0 71mm.
The equivalent thicknesses differ for each gauge size standard which were developed based on the weight of the sheet for a given material.
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.
Corresponds to the standard steel thickness of 0 0329 inches 0 84mm.
Sheet metal thickness gauges for steel are based on a weight of 41 82 pounds per square foot per inch of thickness.
Thus a 10 gauge steel sheet which has a thickness of 0 1345 inches will weigh 41 82 0 1345 5 625 pounds per square foot.
The table below provides conversion to inches.
For example 18 gauge steel according to a gauge conversion chart is 0.
For other materials such as aluminum and brass the thicknesses will be different.
The chart below shows the imperial standard sheet gauge definition with its metric equivalent and today s commercially available ferrous mild steel zintec galvanised steel stainless steel alloys and non ferrous aluminium alloys brass copper sheet.
A gauge conversion chart can be used to determine the actual thickness of sheet metal in inches or millimeters.