Saturday, August 20, 2011

Sheet Metal Gauge Size Chart Standard Steel

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. The equivalent thicknesses differ for each gauge size standard, which were developed based on the weight of the sheet for a given material. The Manufacturers' Standard Gage provides the thicknesses for standard steel, galvanized steel, and stainless steel. 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. In the UK, the Birmingham Gage (BG) is used for a variety of metals and should not be confused with the Birmingham Wire Gage (BWG), which is used for wires. Lastly, a standard exists for Zinc in which a higher gauge number indicates a thicker sheet. The chart below can be used to determine the equivalent sheet thickness, in inches or millimeters, for a gauge number from the selected gauge size standard. The weight per unit area of the sheet can also be seen in pounds per square foot and kilograms per square meter.



Thickness Weight Per Area
Gauge in mm lb/ft² kg/m²
30.23916.0739.75447.624
40.22425.6959.14644.656
50.20925.3148.53441.668
60.19434.9357.92738.701
70.17934.5547.31535.713
80.16444.1766.70732.745
90.14953.7976.09929.777
100.13453.4165.48726.790
110.11963.0384.87923.822
120.10462.6574.26720.834
130.08972.2783.65917.866
140.07471.8973.04714.879
150.06731.7092.74613.405
160.05981.5192.44011.911
170.05381.3672.19510.716
180.04781.2141.9509.521
190.04181.0621.7058.326
200.03590.9121.4657.151
210.03290.8361.3426.553
220.02990.7591.2205.955
230.02690.6831.0975.358
240.02390.6070.9754.760
250.02090.5310.8534.163
260.01790.4550.7303.565
270.01640.4170.6693.267
280.01490.3780.6082.968
290.01350.3430.5512.689
300.01200.3050.4902.390
310.01050.2670.4282.091
320.00970.2460.3961.932
330.00900.2290.3671.793
340.00820.2080.3351.633
350.00750.1910.3061.494
360.00670.1700.2731.335
370.00640.1630.2611.275
380.00600.1520.2451.195

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