Imperial Sheet Metal Sizes

The story of gauge.

Imperial sheet metal sizes.

The series ran 2 4 6 8 10 12 14 16 18 20 22 25 28 32 36 40 45 50 55 60 65 70 75 80 85 90 95 100 110 125 135 150 165 180 200 220 240 and 250. The corresponding galvanized steel thickness is 0 0366 inches 0 93mm and the corresponding aluminum thickness is 0 028 inches 0 71mm. Class 12 9 1 200 mpa high tensile. Imperial grades ibf in2 psi metric classes mpa n mm2 l9 180 000 psi high tensile.

An act of congress march 3 1893 established the u s. Metric and imperial steel sizes and weights dimensions pipe rhs shs cattle rail flat round square and flat bar angle square tube rectangular tube tables. The imperial paper sizes were used to define large sheets of paper and the naming convention was derived from the sheet name and how many times it was folded. For example royal paper is 508mm x 635mm and when it is folded three times it makes 8 sheets and goes by the name royal octavo which is 253 mm x 158 mm.

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.