Thickness Tolerance On 18 Ga Sheet Steel

There are several different gauge systems used today with specific gauge designations used for specific metal types. Gauge decimal equivalent tolerance plus minus 7 1874 007 7 87 7 72 8 1650 007 6 93 6 80 10 1350 006 5 67 5 56 11 1200 005 5 04 4 94 12 1054 005 4 43 4 34 13 0900. The thickness of an 18 gauge aluminum sheet is 0403 inch.

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Thickness tolerance on 18 ga sheet steel.

Gauge to thickness chart 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. Conversion data chart standard gauges chart gauge tolerance chart useful data page. The tolerances in the table and attachments reflect current manufacturing practices and commercial standards and are not representative of the manufacturer s standard gauge which has no inherent tolerances. The thickness of an 18 gauge stainless steel sheet is 0516 inch.

For example in one gauge system 18 gauge steel measures 0 0478 inches thick but 18 gauge aluminum is 0 0403 inches thick. During the rolling process the rollers bow slightly which results in the sheets being thinner on the edges. Using the manufacturers standard gauge table the thickness of 18 gauge mild steel sheet metal is 0478 inch thick.