Common Sheet Metal Thickneeses

The two most common metals used for ductwork are aluminum and galvanized steel and the requirements for both are listed in the international mechanical code book.

Common sheet metal thickneeses.

There are other measurement units used to categorise metals by thickness though. For other materials such as aluminum and brass the thicknesses will be different. A aluminium sheets metal gauge sometimes spelled gage indicates the standard thickness of sheet metal for a specific material. Commonly used steel sheet metal ranges from 30 gauge to about 7 gauge.

The equivalent thicknesses differ for each gauge size standard which were developed based on the weight of the sheet for a given material. The standard thickness increases for larger dimensions of piping made from sheet metal so it can withstand the stresses of greater length and diameter without buckling under its own weight. Haomei common used aluminum sheet thickness 0 3mm 0 5mm 0 8mm 1mm 1 2mm 1 5mm 2mm 2 5mm 3mm 4mm 5mm and above. The larger the gauge number the thinner the metal.

For example 18 gauge steel according to a gauge conversion chart is 0 0478 inch or 1 214 millimeter. Gauge to thickness chart click here for a printable pdf chart gauge. Sheet metal is any metal that has a thickness in between 0 5 6 millimetres. But this subchapter shall not be construed to increase duties upon any articles which may be imported.

The manufacturers standard gage provides the thicknesses for standard steel galvanized steel and stainless steel. Millimetres mils gauge foils sheets and plates are pretty much the same with the only difference being in thickness. The brown and sharpe gage also known as the american wire gage awg is used for most non ferrous metals such as aluminum and brass. Sheet metal is one of the shapes and forms metal can be bought in.

As the gauge number increases the material thickness decreases. The gauge number 18 holds no relevance to the actual measurements. Approximate thickness in decimal parts of an inch. For 18 ga crs the weight is 2 0 pounds per square foot and for 20 ga crs the weight is 1 5 pounds per square foot.

In the u s the thickness of sheet metal is commonly specified by a traditional non linear measure known as its gauge. A gauge conversion chart can be used to determine the actual thickness of sheet metal in inches or millimeters. Approximate thickness in fractions of an inch. Gauge differs between ferrous iron based metals and nonferrous metals such as aluminum or copper.

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.