During the rolling process
the rollers bow slightly, which results in the sheets being
thinner on the edges.[3] 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.
Steel sheet metal - tolerances[13][3]
Gauge |
Nominal [in (mm)] |
Max [in (mm)] |
Min [in (mm)] |
10 |
0.1345 (3.42) |
0.1405 (3.57) |
0.1285 (3.26) |
11 |
0.1196 (3.04) |
0.1256 (3.19) |
0.1136 (2.89) |
12 |
0.1046 (2.66) |
0.1106 (2.81) |
0.0986 (2.50) |
14 |
0.0747 (1.90) |
0.0797 (2.02) |
0.0697 (1.77) |
16 |
0.0598 (1.52) |
0.0648 (1.65) |
0.0548 (1.39) |
18 |
0.0478 (1.21) |
0.0518 (1.32) |
0.0438 (1.11) |
20 |
0.0359 (0.91) |
0.0389 (0.99) |
0.0329 (0.84) |
22 |
0.0299 (0.76) |
0.0329 (0.84) |
0.0269 (0.68) |
24 |
0.0239 (0.61) |
0.0269 (0.68) |
0.0209 (0.53) |
26 |
0.0179 (0.45) |
0.0199 (0.51) |
0.0159 (0.40) |
28 |
0.0149 (0.38) |
0.0169 (0.43) |
0.0129 (0.33) |
Aluminium sheet metal tolerances[3]
Thickness [in (mm)] |
Sheet width |
36 (914.4) [in (mm)] |
48 (1,219) [in (mm)] |
0.018–0.028 (0.46–0.71) |
0.002 (0.051) |
0.0025 (0.064) |
0.029–0.036 (0.74–0.91) |
0.002 (0.051) |
0.0025 (0.064) |
0.037–0.045 (0.94–1.1) |
0.0025 (0.064) |
0.003 (0.076) |
0.046–0.068 (1.2–1.7) |
0.003 (0.076) |
0.004 (0.10) |
0.069–0.076 (1.8–1.9) |
0.003 (0.076) |
0.004 (0.10) |
0.077–0.096 (2.0–2.4) |
0.0035 (0.089) |
0.004 (0.10) |
0.097–0.108 (2.5–2.7) |
0.004 (0.10) |
0.005 (0.13) |
0.109–0.125 (2.8–3.2) |
0.0045 (0.11) |
0.005 (0.13) |
0.126–0.140 (3.2–3.6) |
0.0045 (0.11) |
0.005 (0.13) |
0.141–0.172 (3.6–4.4) |
0.006 (0.15) |
0.008 (0.20) |
0.173–0.203 (4.4–5.2) |
0.007 (0.18) |
0.010 (0.25) |
0.204–0.249 (5.2–6.3) |
0.009 (0.23) |
0.011 (0.28) |
Stainless steel sheet metal tolerances[3]
Thickness [in (mm)] |
Sheet width |
36 (914.4) [in (mm)] |
48 (1,219) [in (mm)] |
0.017–0.030 (0.43–0.76) |
0.0015 (0.038) |
0.002 (0.051) |
0.031–0.041 (0.79–1.0) |
0.002 (0.051) |
0.003 (0.076) |
0.042–0.059 (1.1–1.5) |
0.003 (0.076) |
0.004 (0.10) |
0.060–0.073 (1.5–1.9) |
0.003 (0.076) |
0.0045 (0.11) |
0.074–0.084 (1.9–2.1) |
0.004 (0.10) |
0.0055 (0.14) |
0.085–0.099 (2.2–2.5) |
0.004 (0.10) |
0.006 (0.15) |
0.100–0.115 (2.5–2.9) |
0.005 (0.13) |
0.007 (0.18) |
0.116–0.131 (2.9–3.3) |
0.005 (0.13) |
0.0075 (0.19) |
0.132–0.146 (3.4–3.7) |
0.006 (0.15) |
0.009 (0.23) |
0.147–0.187 (3.7–4.7) |
0.007 (0.18) |
0.0105 (0.27) |
|