Because of the varying thicknesses a gauge chart should be used to ensure the metal meets the required dimensions.
Aluminum sheet gauge thickness chart.
Take for instance 12 gauge thickness across the material types listed below.
Gauge stainless galvanized sheet steel aluminum fraction inches mm inches mm inches mm inches mm 30 0 0125 0 33 0 0157 0 40 0 0120 0 30 0 0100 0 25 29 0 0141 0 36 0 0172 0 44 0 0135 0 34 0 0113 0 29 28 1 64 0 0156 0 41 0 0187 0 47 0 0149 0 38 0 0126 0 32 27 0 0172 0 43 0 0202 0 51 0 0164 0 42 0 0142 0 36 26 0 0187 0 48 0 0217 0 55 0 0179 0 45 0 0159 40 25 0 0219 0 56 0 0247 0 63 0 0209.
For example in one gauge system 18 gauge steel measures 0 0478 inches thick but 18 gauge aluminum is 0 0403 inches thick.
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History of the gauge system the gauge system has long history in metal fabrication.
Sheet steel aluminum.
It is important to know that the gauge thicknesses also vary depending on the type of sheet metal being referenced.
Armour alloys aluminum gauge charts are available as well as many resources for all your stainless and aluminum needs.
Gauge to thickness chart.
Gauge to thickness chart.
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