Size tolerances for strip steel

The thickness and width tolerances are +/- tolerances to the nominal size. The normal tolerance classes for most of our strip products are T2 and B1. Tighter tolerances as well as other tolerance limits can be offered upon request.

Thickness tol., mm

Thickness tolerance, mm

Thickness Width Thickness tolerance, mm ±
Tolerance class
mm mm T1 T2 T3 T4
<0.025 –250
>250-400
0.003
0.004
0.002
0.003
0.0015
0.002
0.001
0.0015
0.025–<0.04 –250
>250–400
0.004
0.005
0.003
0.004
0.002
0.003
0.0015
0.002
0.04–<0.063 –250
>250–400
0.005
0.006
0.004
0.005
0.003
0.004
0.002
0.003
0.063–<0.1 –250
>250–400
0.006
0.007
0.005
0.006
0.004
0.005
0.003
0.004 
0.1–<0.125 –250
>250–400
0.007
0.008
0.005
0.006
0.004
0.005
0.003
0.004 
0.125–<0.16 –250
>250–400
0.009
0.01
0.006
0.007
0.005
0.006
0.004
0.005 
0.16–<0.2 –250
>250–400
0.01
0.011
0.007
0.008
0.005
0.006
0.004
0.005 
0.2–<0.25 –250
>250–400>
400–600
0.011
0.013
0.014
0.008
0.009
0.010
0.006
0.007
0.008
0.004
0.006
0.007
0.25–<0.315 –250
>250–400
>400-600 
0.013
0.015
0.017 
0.009
0.011
0.012 
0.007
0.008
0.009 
0.005
0.006
0.007 
0.315–<0.4 –250
>250–400
>400-600 
0.015
0.017
0.020 
0.011
0.012
0.140 
0.008
0.009
0.010 
0.006
0.006 
0.008 
0.4–<0.5 –250
>250–400
>400-600 
0.017
0.020
0.023 
0.012
0.014
0.017 
0.009
0.010
0.012 
0.006
0.007 
0.009 
0.5–<0.63 –250
>250–400
>400-600 
0.020
0.024
0.028 
0.014
0.017
0.020 
0.010
0.012
0.014 
0.007
0.009
0.010 
0.63–<0.8 –250
>250–400
>400-600 
0.023
0.027
0.032 
0.017
0.020
0.023 
0.012
0.014
0.016 
0.008
0.010
0.012 
0.8–<1 –250
>250–400
>400-600 
0.027
0.032
0.037 
0.019
0.023
0.027 
0.013
0.016
0.019 
0.009
0.012 
0.014 
1–<1.25 –250
>250–400
>400-600 
0.034
0.036
0.042 
0.024
0.026
0.029 
0.017
0.018
0.021 
0.012
0.013
0.015 
1.25–<1.6 –250
>250–400
>400-600 
0.039
0.044
0.050 
0.028
0.032
0.038 
0.020
0.022
0.026 
0.014
0.016
0.019 
1.6–<2 –250
>250–400
>400-600 
0.046
0.050
0.060 
0.033
0.038
0.042 
0.023
0.026
0.029 
0.017
0.019
0.021 
2–<2.5 –250
>250–400
>400-600 
0.050
0.055
0.065 
0.035
0.040
0.050 
0.025
0.028
0.033 
0.017
0.020
0.024 
2.5–<3.15 –250
>250–400
>400-600 
0.056
0.060
0.070 
0.040
0.043
0.050 
0.028
0.030
0.035 
0.020
0.022
0.025 
3.15–5 –250
>250-400
>400-600
0.063
0.065
0.080
0.045
0.050
0.060
0.032
0.034
0.040
0.022
0.024
0.029 

Thickness tol., inch

Thickness tolerance, in.

Thickness Width Thickness tolerance, in.±
Tolerance class

in. in. T1 T2 T3 T4
–<.0010
–9.8
>9.8–15.7
.00012
.00016
.00008
.00012
.00006
.00008
.00004
.00006 
.0010–<.0016 –9.8
>9.8–15.7
.00016
.00020
.00012
.00016
.00008
.00012
.00006
.00008
.0016–<.0025 –9.8
>9.8–15.7
.00020
.00024
.00016
.00020
.00012
.00016
.00008
.00012
.0025–<.0039 –9.8
>9.8–15.7
.00024
.00028
.00020
.00024
.00016
.00020
.0001
.00016
.0039–<.0049 –9.8
>9.8–15.7
.00028
.00031
.00020
.00024
.00016
.00020
.00012
.00016
.0049–<.0063 –9.8
>9.8–15.7
.00035
.00039
.00024
.00028
.00020
.00024
.00016
.00020
.0063–<.0079 –9.8
>9.8–15.7
.00039
.00043
.00028
.00031
.00020
.00024
.00016
.00020
.0079–<.0098 –9.8
>9.8–15.7
>15.7–23.6
.00043
.00051
.00055
.00031
.00035
.00039
.00024
.00028
.00031
.00016
.00024
.00028
.0098–<.0124 –9.8
>9.8–15.7
>15.7–23.6
.00051
.00059
.00067
.00035
.00043
.00047
.00028
.00031
.00035
.00020
.00024
.00028
.0124–<.0157 –9.8
>9.8–15.7
>15.7–23.6
.00059
.00067
.00079
.00043
.00047
.00055
.00031
.00035
.00039
.00024
.00024
.00031
.0157–<.0197 –9.8
>9.8–15.7
>15.7–23.6
.00067
.00079
.00091
.00047
.00055
.00067
.00035
.00039
.00047
.00024
.00028
.00035
.0197–<.0248 –9.8
>9.8–15.7
>15.7–23.6
.00079
.00094
.00110
.00055
.00067
.00079
.00039
.00047
.00055
.00028
.00035
.00039
.0248–<.0315 –9.8
>9.8–15.7
>15.7–23.6
.00091
.00106
.00126
.00067
.00079
.00091
.00047
.00055
.00063
.00031
.00039
.00047
.0315–<.0394 –9.8
>9.8–15.7
>15.7–23.6
.00106
.00126
.00146
.00075
.00091
.00106
.00051
.00063
.00075
.00035
.00047
.00055
.0394–<.0492 –9.8
>9.8–15.7
>15.7–23.6
.00134
.00142
.00165
.00094
.00102
.00114
.00067
.00071
.00083
.00047
.00051
.00059
.0492–<.0630 –9.8
>9.8–15.7
>15.7–23.6
.00153
.00173
.00197
.00110
.00126
.00150
.00079
.00087
.00102
.00055
.00063
.00075
.0630–<.0787 –9.8
>9.8–15.7
>15.7–23.6
.00181
.00197
.00236
.00130
.00150
.00165
.00091
.00102
.00114
.00067
.00075
.00083
.0787–<.0984 –9.8
>9.8–15.7
>15.7–23.6
.00197
.00216
.00256
.00138
.00157
.00197
.00098
.00110
.00130
.00067
.00079
.00094
.0984–<.1240 –9.8
>9.8–15.7
>15.7–23.6
.00220
.00236
.00276
.00157
.00169
.00197
.00110
.00018
.00138
.00079
.00087
.00098
.1240–<.1969 –9.8
>9.8–15.7
>15.7–23.6
.00248
.00256
.00315
.00177
.00197
.00236
.00126
.00134
.00157
.00087
.00094
.00114

Width tol., mm

Width tolerance, mm

Thickness Width Width tolerance, mm ±
Tolerance class
mm mm B1 B2 B3 B4
<0.25
–<20
20-<50
50-<125
125-<250
250-<400
400-<600
600-<800
0.07
0.10
0.15
0.20
0.30
0.40
0.60
0.05
0.07
0.11
0.15
0.20
0.30
0.40
0.03
0.05
0.07
0.10
0.15
0.20
0.30
0.02
0.035
0.05
0.07
0.10
-
-
0.25–
<0.50
–< 20
20–< 50
50-<125
125-<250
250-<400
400-<600
600-<800
0.10
0.15
0.20
0.25
0.35
0.50
0.70
0.07
0.11
0.15
0.20
0.30
0.35
0.50
0.05
0.07
0.10
0.15
0.20
0.25
0.35
0.03
0.05
0.07
0.10
0.15
-
-
0.50–
<1.00
–< 20
20–< 50
50-<125
125-<250
250-<400
400-<600
600-<800
0.15
0.20
0.25
0.30
0.40
0.60
0.80
0.11
0.15
0.20
0.25
0.30
0.40
0.60
0.07
0.10
0.15
0.15
0.20
0.30
0.40
0.05
0.07
0.10
0.10
0.15
-
-
1.00–
<1.60
–< 20
20–< 50
50-<125
125-<250
250-<400
400-<600
600-<800
0.20
0.25
0.30
0.35
0.45
0.70
0.90
0.15
0.20
0.25
0.25
0.35
0.50
0.60
0.10
0.15
0.15
0.20
0.25
0.35
0.40
0.07
0.10
0.10
0.15
0.20
-
-
1.60–
<2.00
–< 20
20–< 50
50-<125
125-<250
250-<400
400-<600
600-<800
0.25
0.30
0.35
0.40
0.50
0.70
0.90
0.20
0.20
0.30
0.30
0.35
0.50
0.60
0.15
0.15
0.20
0.20
0.25
0.35
0.40
0.10
0.10
0.15
0.15
0.20
-
-
2.00–
<2.50
–< 20
20–< 50
50-<125
125-<250
250-<400
400-<600
600-<800
0.35
0.35
0.40
0.45
0.55
0.80
1.00
0.25
0.25
0.30
0.35
0.40
0.60
0.70
0.20
0.20
0.20
0.25
0.30
0.40
0.50
0.15
0.15
0.15
0.20
0.25
-
-
2.50–
<4.00
–< 20
20–< 50
50-<125
125-<250
250-<400
400-<600
600-<800

0.40
0.45
0.50
0.60
0.80
1.00

0.30
0.30
0.35
0.40
0.60
0.70

0.20
0.20
0.25
0.30
0.40
0.50

0.15
0.15
0.20
0.25
-
-

Width tol., inch

Width tolerance, in.

Thickness Width Width tolerance, in. ±
Tolerance class
in. in. B1  B2  B3  B4 
-<.0098 -< .79
.79 -< 1.97
1.97 -< 4.9
4.9 -< 9.8
9.8 -< 15.7
15.7 -< 23.6
23.6 -< 31.5
.0028
.0039
.0059
.0079
.0118
.0157
.0236
.0020
.0028
.0043
.0059
.0079
.0118
.0157
.0012
.0020
.0028
.0039
.0059
.0079
.0118
.0008
.0014
.0020
.0028
.0039
-
-
.0098-<.0197 -< .79
.79 -< 1.97
1.97 -< 4.9
4.9 -< 9.8
9.8 -< 15.7
15.7 -< 23.6
23.6 -< 31.5
.0039
.0059
.0079
.0098
.0138
.0197
.0276
.0028
.0043
.0059
.0079
.0118
.0138
0.197
.0020
.0028
.0039
.0059
.0079
.0098
.0138
.0012
.0020
.0028
.0039
.0059
-
-
.0197-<.0394 -< .79
.79 -< 1.97
1.97 -< 4.9
4.9 -< 9.8
9.8 -< 15.7
15.7 -< 23.6
23.6 -< 31.5
.0059
.0079
.0098
.0118
.0157
.0236
.0315
.0043
.0059
.0079
.0098
.0118
.0157
.0236
.0028
.0039
.0059
.0059
.0079
.0118
.0157
.0020
.0028
.0039
.0039
.0059
-
-
.0394-<.0630 -< .79
.79 -< 1.97
1.97 -< 4.9
4.9 -< 9.8
9.8 -< 15.7
15.7 -< 23.6
23.6 -< 31.5
.0079
.0098
.0118
.0138
.0177
.0276
.0354
.0059
.0079
.0098
.0098
.0138
.0197
.0236
.0039
.0059
.0059
.0079
.0098
.0138
.0157
.0028
.0039
.0039
.0059
.0079
-
-
.0630-<.0787 -< .79
.79 -< 1.97
1.97 -< 4.9
4.9 -< 9.8
9.8 -< 15.7
15.7 -< 23.6
23.6 -< 31.5
.0098
.0118
.0138
.0157
.0197
.0276
.0354 
.0079
.0079
.0018
.0118
.0138
.0197
.0236 
.0059
.0059
.0079
.0079
.0098
.0138
.0157
.0039
.0039
.0059
.0059
.0079
-
-
.0787-<.0984 -< .79
.79 -< 1.97
1.97 -< 4.9
4.9 -< 9.8
9.8 -< 15.7
15.7 -< 23.6
23.6 -< 31.5
.0138
.0138
.0157
.0177
.0217
.0315
.0394
.0098
.0098
.0118
.0138
.0157
.0236
.0276
.0079
.0079
.0079
.0098
.0118
.0157
.0197
.0059
.0059
.0059
.0079
.0098
-
-
.0984 -< .1575 -< .79
.79 -< 1.97
1.97 -< 4.9
4.9 -< 9.8
9.8 -< 15.7
15.7 -< 23.6
23.6 <- 31.5
-
.0157
.0177
.0197
.0236
.0315
.0394
-
.0118
.0118
.0138
.0157
.0236
.0276
-
.0079
.0079
.0098
.0118
.0157
.0197
-
.0059
.0059
.0079
.0098
-
-