Tolerances - D.O.M. Steel Tubing

O.D. Size Range O.D. Inches I.D. Inches
Over Under Over Under
Up to 0.500 0.004 0.000
0.500- 1.669, incl. 0.005 0.000 0.000 0.005
1.700-2.009, incl. 0.006 0.000 0.000 0.006
2.100-2.499, incl. 0.007 0.000 0.000 0.007
2.500-2.899, incl. 0.008 0.000 0.000 0.008
2.900-3.299, incl. 0.009 0.000 0.000 0.009
3.300-3.699, incl. 0.010 0.000 0.000 0.010
3.700-4.009, incl. 0.011 0.000 0.000 0.011
4.100-4.499, incl. 0.012 0.000 0.000 0.012
4.500-4.899, incl. 0.013 0.000 0.000 0.013
4.900-5.299, incl. 0.014 0.000 0.000 0.014
5.300-5.549, incl. 0.015 0.000 0.000 0.015
5.550-5.999, incl. 0.010 0.010 0.010 0.010
6.000-6.499, incl. 0.013 0.013 0.013 0.013
6.500-6.999, incl. 0.015 0.015 0.015 0.015
7.000-7.499, incl. 0.018 0.018 0.018 0.018
7.500-7.999, incl. 0.020 0.020 0.020 0.020
8.000-8.499, incl. 0.023 0.023 0.023 0.023
8.500-8.999, incl. 0.025 0.025 0.025 0.025
8.500-8.999, incl. 0.028 0.028 0.028 0.028
9.500-9.999, incl. 0.030 0.030 0.030 0.030
10.000-10.999, incl. 0.034 0.034 0.034 0.034
11.000-11.999, incl. 0.035 0.035 0.035 0.035
12.000-12.999, incl. 0.037 0.037 0.037 0.037
The ovality shall be within the above tolerance except when the wall thickness is less than 3% of the O.D.. In such cases, the additional ovality shall be as follows, but the mean diameter shall be within the specified tolerance:
Additional Ovality Tolerance Additional Ovality Tolerance
O.D. Inches Inch O.D. Inches Inch
Up to 2 incl. 0.010 Over 7 to 8 incl. 0.040
Over 2 lo 3 incl. 0.015 Over 8 to 9 incl. 0.045
Over 3 lo 4 incl. 0.020 Over 9 to 10 incl. 0.050
Over 4 lo 5 incl. 0.025 Over 10 to 11 incl. 0.055
Over 5 lo 6 incl. 0.030 Over 11 to 12 incl. 0.060
Over 6 lo 7 incl. 0.035 Over 12 to 12.5 incl. 0.065

Typical Minimum Tensile Properties

(Drawn Over Mandrel, as Drawn 1020, 1026)

GRADE 1020 1026
Yield 60,000 75,000
Ultimate 70,000 85,000
% Elongation -- 2"
(Full Section)		 10 8
Typical Hardness - Min. B-80 B-85

Wall Thickness Tolerances

(Drawn Over Mandrel, ERW Round Mechanical Steel Tubing)

Wall Thickness Inch O.D. Tubes, Inches
0.375 to 0.875 0.875 to 1.875 1.875 to 3.750 3.750 to 12.500
0.028 +0.002 +0.002 +0.002
-0.002 -0.002 -0.002
0.035 +0.002 +0.002 +0.002
-0.002 -0.002 -0.002
0.049 +0.002 +0.002 +0.002
-0.002 -0.003 -0.003
0.065 +0.002 +0.002 +0.002 +0.004
-0.002 -0.003 -0.003 -0.005
0.083 +0.002 +0.002 +0.003 +0.004
-0.002 -0.003 -0.003 -0.005
0.095 +0.002 +0.002 +0.003 +0.005
-0.002 -0.003 -0.003 -0.005
0.109 +0.002 +0.002 +0.003 +0.004
-0.002 -0.003 -0.003 -0.005
0.120 +0.003 +0.002 +0.003 +0.004
-0.003 -0.003 -0.003 -0.005
0.134 +0.002 +0.003 +0.005
-0.003 -0.003 -0.005
0.148 +0.002 +0.003 +0.005
-0.004 -0.003 -0.005
0.165 +0.002 +0.003 +0.005
-0.004 -0.004 -0.006
0.180 +0.004 +0.003 +0.006
-0.004 -0.004 -0.006
0.203 +0.004 +0.004 +0.006
-0.005 -0.005 -0.007
0.220 +0.004 +0.007
-0.006 -0.007
0.238 +0.005 +0.007
-0.006 -0.007
0.259 +0.005 +0.007
-0.006 -0.007
0.284 +0.005 +0.007
-0.006 -0.007
0.300 +0.006 +0.008
-0.008 -0.008
0.320 +0.007 +0.008
-0.007 -0.008
0.344 +0.008 +0.009
-0.008 -0.009
0.375 +0.009
-0.009
0.400 +0.010
-0.010
0.438 +0.011
-0.011
0.480 +0.012
-0.012
0.531 +0.013
-0.013
0.563 +0.013
-0.013
0.580 +0.014
-0.014
For intermediate wall: Use the tolerance for the nearest listed wall. If the intermediate wall falls equally between two listed walls, use the greater tolerance.

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