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Precision DOM Tubing

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Precision DOM Tubing
Precision DOM Tubing
Precision DOM Tubing
Precision DOM Tubing
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Precision DOM Tubing

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Outside Diameter Tolerance

Dom Mechanical Tubing to ASTM A513 standard, Type1 - 6 Through 15" O.D. and up to .688" Walls Material : 1008, 1010, 1015, 1018, 1018M, 1020, 1026, 1035, 1040, ST52.3, ST52.3 with Vanadium, 1523, 1526
Diameter Tolerances for Types 3,4,5 and 6 (S.D.H.R., S.D.C.R., M.D. and S.S.I.D) Round Tubing
OD Size Range Wall% of OD Types 3,4(Sink Drawn) and 5,6 (Mandrel Drawn) OD, in. Types 5 and 6(Mandrel Drawn) ID, in
Over Under Over Under
up to .499 all 0.004 0 ... ...
0.500 to 1.699 all 0.005 0 0 0.005
1.700 to 2.099 all 0.006 0 0 0.006
2.100 to 2.499 all 0.007 0 0 0.007
2.500 to 2.899 all 0.008 0 0 0.008
2.900 to 3.299 all 0.009 0 0 0.009
3.300 to 3.699 all 0.01 0 0 0.01
3.700 to 4.099 all 0.011 0 0 0.011
4.100 to 4.499 all 0.012 0 0 0.012
4.500 to 4.899 all 0.013 0 0 0.013
4.900 to 5.299 all 0.014 0 0 0.014
5.300 to 5.549 all 0.015 0 0 0.015
5.550 to 5.999 under 6 0.01 0.01 0.01 0.01
6.000 to 6.499 6 and over 0.009 0.009 0.009 0.009
under 6 0.013 0.013 0.013 0.013
6 and over 0.01 0.01 0.01 0.01
6.500 to 6.999 under 6 0.015 0.015 0.015 0.015
6 and over 0.012 0.012 0.012 0.012
7.000 to 7.499 under 6 0.018 0.018 0.018 0.018
6 and over 0.013 0.013 0.013 0.013
7.500 to 7.999 under 6 0.02 0.02 0.02 0.02
6 and over 0.015 0.015 0.015 0.015
8.000 to 8.499 under 6 0.023 0.023 0.023 0.023
6 and over 0.016 0.016 0.016 0.016
8.500 to 8.999 under 6 0.025 0.025 0.025 0.025
6 and over 0.017 0.017 0.017 0.017
9.000 to 9.499 under 6 0.028 0.028 0.028 0.028
6 and over 0.019 0.019 0.019 0.019
9.500 to 9.999 under 6 0.03 0.03 0.03 0.03
6 and over 0.02 0.02 0.02 0.02
10.000 to 10.999 all 0.034 0.034 0.034 0.034
11.000 to 11.999 all 0.035 0.035 0.035 0.035
12.000 to 12.999 all 0.036 0.036 0.036 0.036
13.000 to 13.999 all 0.037 0.037 0.037 0.037
14.000 to 14.999 all 0.038 0.038 0.038 0.038

Inner Diameter Tolerance

Wall Thickness of Types 5 and 6 (M.D. and S.S.I.D) Round Tubing
Outside Diameter, in.
Wall thickness 3/8 to 7/8, incl Over 7/8 to 1 7/8, incl Over 1 7/8 to 3 3/4, incl Over 3 3/4 to 15, incl
in. Bwg Wall thickness tolerances, in, +/-
    + - + - + - + -
0.035 20 0.002 0.002 0.002 0.002 0.002 0.002 ... ...
0.049 18 0.002 0.002 0.002 0.003 0.002 0.003 ... ...
0.065 16 0.002 0.002 0.002 0.003 0.002 0.003 0.004 0.004
0.083 14 0.002 0.002 0.002 0.003 0.003 0.003 0.004 0.005
0.095 13 0.002 0.002 0.002 0.003 0.003 0.003 0.004 0.005
0.109 12 0.002 0.003 0.002 0.004 0.003 0.003 0.005 0.005
0.12 11 0.003 0.003 0.002 0.004 0.003 0.003 0.005 0.005
0.134 10 ... ... 0.002 0.004 0.003 0.003 0.005 0.005
0.148 9 ... ... 0.002 0.004 0.003 0.003 0.005 0.005
0.165 8 ... ... 0.003 0.004 0.003 0.004 0.005 0.006
0.18 7 ... ... 0.004 0.004 0.003 0.005 0.006 0.006
0.203 6 ... ... 0.004 0.005 0.004 0.005 0.006 0.007
0.22 5 ... ... 0.004 0.006 0.004 0.006 0.007 0.007
0.238 4 ... ... 0.005 0.006 0.005 0.006 0.007 0.007
0.259 3 ... ... 0.005 0.006 0.005 0.006 0.007 0.007
0.284 2 ... ... 0.005 0.006 0.005 0.006 0.007 0.008
0.3 1 ... ... 0.006 0.006 0.006 0.006 0.008 0.008
0.32   ... ... 0.007 0.006 0.007 0.007 0.008 0.009
0.344   ... ... 0.008 0.007 0.008 0.008 0.009 0.009
0.375   ... ... ... 0.008 0.009 0.009 0.009 0.01
0.4   ... ... ... ... 0.01 0.01 0.01 0.011
0.438   ... ... ... ... 0.011 0.011 0.011 0.012
0.46   ... ... ... ... 0.012 0.012 0.012 0.012
0.48   ... ... ... ... 0.012 0.012 0.012 0.013
0.46   ... ... ... ... 0.013 0.013 0.013 0.013
0.48   ... ... ... ... 0.013 0.013 0.013 0.014
0.531   ... ... ... ... 0.014 0.013 0.014 0.014
0.563   ... ... ... ... 0.015 0.014 0.015 0.015
0.58   ... ... ... ... 0.016 0.015 0.016 0.016
0.6   ... ... ... ... 0.017 0.016 0.017 0.016
0.625   ... ... ... ... 0.018 0.017 0.018 0.017
0.65   ... ... ... 0.017 0.019 0.018 0.018 0.017

DOM is actually not a type of tubing, but a process that is applied to tubing after it is initially constructed. It is Drawn Over a Mandrel...which "cold works" it, giving it more exact dimensions relative to the inside and outside diameters, a smoother finish, and better alignment of the crystal lattice structure. Although it is almost always referred to as a SEAMLESS tube, technically it is NOT seamless tubing, and it started life as some sort of EW (electric welded) tubing. During the manufacturing process, the weld line becomes nearly undetectable, thus it is referred to as SEAMLESS. It is considered a high strength, high quality tube, and is normally constructed from SAE 1020 or 1026 steel. DOM is commonly used in the manufacturing of race cars and motorcycle frames.
 
1020 is normally used in the manufacturing of small-diameter or thin-wall DOM steel tube. 1026 grade is normally used in the manufacturing of DOM over 2" OD, with walls heavier than .156". Depending on the diameter and/or the wall thickness, you may receive EITHER 1020 or 1026.