Sheet Metal Wire Gauge Sizes Table Chart

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The following sheet metal gauge size reference chart gives the weight and thickness of sheet metal given as a "gauge" (sometimes spelled gage) and indicates the standard thickness of sheet metal and wire.For most materials, as the gauge number increases, the material thickness decreases.

The gage sizes are specified by numbers and the following tables also gives the decimal equivalents of the different gage numbers. There is some disagreement with regards to the use of gage numbers when purchasing gage size where it is preferable to give the exact dimensions in decimal fractions of an inch while referencing the gauge size and material. While the dimensions thus specified should conform to the gage ordinarily used for a given class of material, any error in the specification due, for example, to the use of a table having "rounded off"? or approximate equivalents, will be apparent to the manufacturer at the time the order is placed. This author recommends specifications for both gage and decimal thickness when ordering sheet metal gage stock.

Sheet Metal Gauge Size Table Chart

GAUGE
no.
Non-Ferrous
Brown & Sharp
Steel Sheets
Strip & Tubing
Birmingham or Stubs
lbs./Sq. ft.
1100,6061
Aluminum
Gauge Decimal (inches) lbs./Sq. ft.
Alloy 260
Brass
Gauge
Decimal (inches)
lbs./Sq. ft.
Steel Strip
Gauge Decimal (inches) lbs./Sq. ft.
Steel Strip
000000  -   .5800 - - - - -
00000 -   .5165 - - -   .500   20.40
0000 -   .4600 - - -   .454   18.52
000 -   .4096 - - -   .425   17.34
00 -   .3648 - - -   .380   15.50
0 -   .3249 - - -   .340   13.87
1 -   .2893 - - -   .300   12.24
2 -   .2576 - - -   .284   11.59
3 -   .2294 - .2391 9.754   .259   10.57
4 -   .2043 - .2242 9.146   .238   9.710
5 -   .1819 - .2092 8.534   .220   8.975
6   2.286   .1620   7.185 .1943 7.926   .203   8.281
7   2.036   .1443   6.400 .1793 7.315   .180   7.343
8   1.813   .1285   5.699 .1644 6.707   .165   6.731
9   1.614   .1144   5.074 .1495 6.099   .148   6.038
10   1.438   .1019   4.520 .1345 5.487   .134   5.467
11   1.280   .0907   4.023 .1196 4.879   .120   4.895
12   1.140   .0808   3.584 .1046 4.267   .109   4.447
13   1.016   .0720   3.193 .0897 3.659   .095   3.876
14   .905   .0641   2.843 .0747 3.047   .083   3.386
15   .806   .0571   2.532 .0673 2.746   .072   2.937
16   .717   .0508   2.253 .0598 2.440   .065   2.652
17   .639   .0453   2.009 .0538 2.195   .058   2.366
18   .569   .0403   1.787 .0478 1.950   .049   1.999
19   .507   .0359   1.592 .0418 1.705   .042   1.713
20   .452   .0320   1.419 .0359 1.465   .035   1.428
21   .402   .0285   1.264 .0329 1.342   .032   1.305
22   .357   .0253   1.122 .0299 1.220   .028   1.142
23   .319   .0226   1.002 .0269 1.097   .025   1.020
24   .284   .0201   .892 .0239 .975   .022   .898
25   .253   .0179   .794 .0209 .853   .020   .816
26   .224   .0159   .705 .0179 .730   .018   .734
27   .200   .0142   .630 .0164 .669

Standard sheet metal gauges for Specific Engineering Materials
Gauge
Steel
in (mm)
Galvanized steel
in (mm)
Stainless steel
in (mm)
Aluminum
in (mm)
Zinc
in (mm)
3
0.2391 (6.07) - - - 0.006 (0.15)
4
0.2242 (5.69) - - - 0.008 (0.20)
5
0.2092 (5.31) - - - 0.010 (0.25)
6
0.1943 (4.94) - - 0.162 (4.1) 0.012 (0.30)
7
0.1793 (4.55) - 0.1875 (4.76) 0.1443 (3.67) 0.014 (0.36)
8
0.1644 (4.18) 0.1681 (4.27) 0.1719 (4.37) 0.1285 (3.26) 0.016 (0.41)
9
0.1495 (3.80) 0.1532 (3.89) 0.1563 (3.97) 0.1144 (2.91) 0.018 (0.46)
10
0.1345 (3.42) 0.1382 (3.51) 0.1406 (3.57) 0.1019 (2.59) 0.020 (0.51)
11
0.1196 (3.04) 0.1233 (3.13) 0.1250 (3.18) 0.0907 (2.30) 0.024 (0.61)
12
0.1046 (2.66) 0.1084 (2.75) 0.1094 (2.78) 0.0808 (2.05) 0.028 (0.71)
13
0.0897 (2.28) 0.0934 (2.37) 0.094 (2.4) 0.072 (1.8) 0.032 (0.81)
14
0.0747 (1.90) 0.0785 (1.99) 0.0781 (1.98) 0.0641 (1.63) 0.036 (0.91)
15
0.0673 (1.71) 0.0710 (1.80) 0.07 (1.8) 0.057 (1.4) 0.040 (1.0)
16
0.0598 (1.52) 0.0635 (1.61) 0.0625 (1.59) 0.0508 (1.29) 0.045 (1.1)
17
0.0538 (1.37) 0.0575 (1.46) 0.056 (1.4) 0.045 (1.1) 0.050 (1.3)
18
0.0478 (1.21) 0.0516 (1.31) 0.0500 (1.27) 0.0403 (1.02) 0.055 (1.4)
19
0.0418 (1.06) 0.0456 (1.16) 0.044 (1.1) 0.036 (0.91) 0.060 (1.5)
20
0.0359 (0.91) 0.0396 (1.01) 0.0375 (0.95) 0.0320 (0.81) 0.070 (1.8)
21
0.0329 (0.84) 0.0366 (0.93) 0.034 (0.86) 0.028 (0.71) 0.080 (2.0)
22
0.0299 (0.76) 0.0336 (0.85) 0.031 (0.79) 0.025 (0.64) 0.090 (2.3)
23
0.0269 (0.68) 0.0306 (0.78) 0.028 (0.71) 0.023 (0.58) 0.100 (2.5)
24
0.0239 (0.61) 0.0276 (0.70) 0.025 (0.64) 0.02 (0.51) 0.125 (3.2)
25
0.0209 (0.53) 0.0247 (0.63) 0.022 (0.56) 0.018 (0.46) -
26
0.0179 (0.45) 0.0217 (0.55) 0.019 (0.48) 0.017 (0.43) -
27
0.0164 (0.42) 0.0202 (0.51) 0.017 (0.43) 0.014 (0.36) -
28
0.0149 (0.38) 0.0187 (0.47) 0.016 (0.41) 0.0126 (0.32) -
29
0.0135 (0.34) 0.0172 (0.44) 0.014 (0.36) 0.0113 (0.29) -
30
0.0120 (0.30) 0.0157 (0.40) 0.013 (0.33) 0.0100 (0.25) -
31
0.0105 (0.27) 0.0142 (0.36) 0.011 (0.28) 0.0089 (0.23) -
32
0.0097 (0.25) - - - -
33
0.0090 (0.23) - - - -
34
0.0082 (0.21) - - - -
35
0.0075 (0.19) - - - -
36
0.0067 (0.17) - - - -
37
0.0064 (0.16) - - - -
38
0.0060 (0.15) - - - -

Steel sheet metal tolerances

Gauge Nominal [in] Max [in] Min [in]
10 0.1345 0.1405 0.1285
11 0.1196 0.1256 0.1136
12 0.1046 0.1106 0.0986
14 0.0747 0.0797 0.0697
16 0.0598 0.0648 0.0548
18 0.0478 0.0518 0.0438
20 0.0359 0.0389 0.0329
22 0.0299 0.0329 0.0269
24 0.0239 0.0269 0.0209
26 0.0179 0.0199 0.0159
28 0.0149 0.0169 0.0129
Aluminum sheet metal tolerances
Thickness [in] Sheet width
36 in [in] 48 in [in]
0.018–0.028 0.002 0.0025
0.029–0.036 0.002 0.0025
0.037–0.045 0.0025 0.003
0.046–0.068 0.003 0.004
0.069–0.076 0.003 0.004
0.077–0.096 0.0035 0.004
0.097–0.108 0.004 0.005
0.109–0.125 0.0045 0.005
0.126–0.140 0.0045 0.005
0.141–0.172 0.006 0.008
0.173–0.203 0.007 0.010
0.204–0.249 0.009 0.011
Stainless steel sheet metal tolerances
Thickness [in] Sheet width
36 in [in] 48 in [in]
0.017–0.030 0.0015 0.002
0.031–0.041 0.002 0.003
0.042–0.059 0.003 0.004
0.060–0.073 0.003 0.0045
0.074–0.084 0.004 0.0055
0.085–0.099 0.004 0.006
0.100–0.115 0.005 0.007
0.116–0.131 0.005 0.0075
0.132–0.146 0.006 0.009
0.147–0.187 0.007 0.0105

Material Specifications for Steel Sheet Metal:

A366: Cold Rolled Commercial Quality
A569: :Hot Rolled Commercial Quality
A570: Hot Rolled Structural Quality
A526: Zinc Coated (Galvanized) Steel
A526/A527: Galvanneal
A591: Electrolytically Zinc Plated

Mechanical Tolerances ASTM ANSI Steel Sheets

Related Resources: American Wire Gauge (AWG) Copper Wire Size Data Chart

The decimal system of indicating gage sizes has been being used quite generally, and depending on industry or organization, gage numbers may or may not be specified. Unfortunately, there is considerable variation in the use of different gages. For example, a gage ordinarily used for copper, brass and other non-ferrous materials, may incorrectly be used for steel, and vice versa. The gages specified in the following table are the ones ordinarily employed for the materials mentioned, but there are some minor exceptions and variations in the different industries.

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