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Mechanical Tube, Structure Tube, Seamless Mechanical Tubing, Seamless Structure Tube
Standard: ASTM A53, ASTM A106, ASTM A519, ASTM A500, ASTM A252, JIS G3441/G3445, EN 10210/10297
Size: OD: 10.3-762mm
WT: 6-35mm
Length: 5.8/6/11.8/12m
Application: Used in the general structure and the mechanism, including construction, machinery, transportation, aviation, petroleum mining and each kind of structural tubes
Seamless mechanical tubing: ASTM A519
DOM mechanical tubing: ASTM A513 T5
ERW mechanical tubing: ASTM A513 T1 or T2
Mechanical Tubing: Tubing used in mechanical and light structural applications. Mechanical pipe is manufactured to meet specific end-use requirements, specifications, tolerances and chemical compositions. This results in a more specific uniformity of performance across the entire pipeline compared to standard pipes. While mechanical pipes can be produced to standard specifications upon request, they are usually produced to "typical" properties which focus on yield strength for a specific size and wall thickness. In some severely formed applications, the yield strength may not even be specified, and mechanical tubes are produced to be "fit for service." Mechanical tubing covers a wide range of structural and non-structural applications.
Application of mechanical tubing:
Solar Racking
Agricultural and dairy products
Greenhouse structures and equipment
Playground and recreational equipment
Conveyor rollers
Carports and metal buildings
Trailers
Appliances
Canopies and Shade Structures
Satellite dish supports
Vinyl stiffening tubes
Miscellaneous product applications
Structural Tubing: Tubing used for structural applications. Standard strength requirements of the tube help dictate applications for which certain tubing is most appropriate. Structural tube is often referred to as hollow structural sections or HSS, are available in round, square and rectangular shapes.
Application of Structural Tubing:
Buildings
Bridges
Towers
Cranes
Sign supports and poles
Off-shore production and drilling platforms
Roll-over protective structures (ROPS)
Chemical composition and mechanical properties
|
Standard |
Grade |
Chemical composition(%) |
Mechanical properties |
||||||
| C |
Si |
Mn |
P | S |
Tensile Strength(Mpa) |
Yield Strength(Mpa) |
Elongation(%) |
||
|
DN1629 |
St37 |
≤0.17 |
- | - |
≤0.04 |
≤0.04 |
350-480 |
≥235 |
≥25 |
|
St44 |
≤0.21 |
- | - |
≤0.04 |
≤0.04 |
420-550 |
≥275 |
≥21 |
|
|
St52 |
≤0.22 |
≤0.55 |
≤1.60 |
≤0.04 |
≤0.035 |
500-650 |
≥355 |
≥21 |
|
Cold drawn seamless mechanical tubing---Diameter Tolerances
|
OD Size Range Inches,Inclusive |
WallPercent of OD |
OD Inches |
ID Inches |
Quenched&TemperedOD & ID ± Inches |
OD Size Range mm ,Inclusive |
WallPercent of OD |
OD Inches |
ID Inches |
Quenched&TemperedOD & ID ± mm |
||||
|
Over |
Under |
Over |
Under |
Over |
Under |
Over |
Under |
||||||
|
0.500-1.699 1.700-2.099 2.100-2.499 |
All All All |
.005 .006 .007 |
.000 .000 .000 |
.000 .000 .000 |
.005 .006 .007 |
.015 .020 .023 |
12.70- 43.16 43.17- 53.32 53.33- 63.48 |
All All All |
0.13 0.15 0.18 |
0.00 0.00 0.00 |
0.00 0.00 0.00 |
0.13 0.15 0.18 |
0.38 0.51 0.58 |
|
2.500-2.899 2.900-3.299 3.300-3.699 3.700-4.099 |
All All All All |
.008 .009 .010 .011 |
.000 .000 .000 .000 |
.000 .000 .000 .000 |
.008 .009 .010 .011 |
.025 .028 .030 .033 |
63.49- 73.64 73.65- 83.80 83.81- 93.96 93.97-104.12 |
All All All All |
0.20 0.23 0.25 0.28 |
0.00 0.00 0.00 0.00 |
0.00 0.00 0.00 0.00 |
0.20 0.23 0.25 0.28 |
0.64 0.71 0.76 0.84 |
|
4.100-4.499 4.500-4.899 4.900-5.299 5.300-5.549 |
All All All All |
.012 .013 .014 .015 |
.000 .000 .000 .000 |
.000 .000 .000 .000 |
.012 .013 .014 .015 |
.036 .038 .041 .044 |
104.13-114.28 114.29-124.44 124.45-134.60 134.61-140.95 |
All All All All |
0.30 0.33 0.36 0.38 |
0.00 0.00 0.00 0.00 |
0.00 0.00 0.00 0.00 |
0.30 0.33 0.36 0.38 |
0.91 0.97 1.04 1.12 |
|
5.550-5.999 |
Under 6 6 to 71/2Over 71/2 |
.010 .009 .018 |
.010 .009 .000 |
.010 .009 .009 |
.010 .009 .009 |
.047 .047 .047 |
140.96-152.38 |
Under 6 6 to 71/2Over 71/2 |
0.25 0.23 0.46 |
0.25 0.23 0.00 |
0.25 0.23 0.23 |
0.25 0.23 0.23 |
1.19 1.19 1.19 |
|
6.000-6.499 |
Under 6 6 to 71/2Over 71/2 |
.013 .010 .020 |
.013 .010 .000 |
.013 .010 .010 |
.013 .010 .010 |
.050 .050 .050 |
152.39-165.08 |
Under 6 6 to 71/2Over 71/2 |
0.33 0.25 0.51 |
0.33 0.25 0.00 |
0.33 0.25 0.25 |
0.33 0.25 0.25 |
1.27 1.27 1.27 |
|
6.500-6.999 |
Under 6 6 to 71/2Over 71/2 |
.015 .012 .023 |
.015 .012 .000 |
.015 .012 .012 |
.015 .012 .012 |
.057 .053 .053 |
165.09-177.78 |
Under 6 6 to 71/2Over 71/2 |
0.38 0.30 0.58 |
0.38 0.30 0.00 |
0.38 0.30 0.30 |
0.38 0.36 0.30 |
1.45 1.35 1.35 |
|
7.000-7.499 |
Under 6 6 to 71/2Over 71/2 |
.018 .013 .026 |
.018 .013 .000 |
.018 .013 .013 |
.018 .013 .013 |
.065 .056 .056 |
177.79-190.48 |
Under 6 6 to 71/2Over 71/2 |
0.46 0.33 0.66 |
0.46 0.33 0.00 |
0.46 0.33 0.33 |
0.46 0.33 0.33 |
1.65 1.42 1.42 |
|
7.500-8.000 |
Under 6 6 to 71/2Over 71/2 |
.020 .015 .030 |
.020 .015 .000 |
.020 .015 .015 |
.020 .015 .015 |
.070 .060 .060 |
190.49-203.20 |
Under 6 6 to 71/2Over 71/2 |
0.51 0.38 0.76 |
0.51 0.38 0.00 |
0.51 0.38 0.38 |
0.51 0.38 0.38 |
1.78 1.52 1.52 |
Cold drawn seamless mechanical tubing---Wall Thickness Tolerances
|
Wall ThicknessPercent of OD |
Maximum Percent Over & Under Nominal |
Wall ThicknessPercent of OD |
Maximum Percent Over & Under Nominal |
||
|
Under 1.499” ID |
1.500” ID & Over |
Under 38.07mm ID |
38.07mm ID & Over |
||
|
Under 10 |
10.0 |
7.5 |
Under 10 |
10.0 |
7.5 |
|
10 to 25 |
10.0 |
6.0 |
10 to 25 |
10.0 |
6.0 |
|
Over 25 |
12.5 |
7.5 |
Over 25 |
12.5 |
7.5 |
Hot-finished seamless mechanical tubing---Diameter Tolerances
|
OD Size Range Inches, Inclusive |
As Rolled or Annealed OD, ± Inches |
Quenched &TemperedOD & ID ± Inches |
OD Size Range mm Inclusive |
As Rolled or Annealed OD, ± mm |
Quenched & TemperedOD & ID ± mm |
|
2.000-2.499 |
.017 |
.027 |
50.80- 63.48 |
0.43 |
0.686 |
|
2.500-2.999 |
.019 |
.029 |
63.49- 76.17 |
0.48 |
0.737 |
|
3.000-3.499 |
.021 |
.032 |
76.18- 88.87 |
0.53 |
0.813 |
|
3.500-3.999 |
.023 |
.035 |
88.88-101.57 |
0.58 |
0.889 |
|
4.000-4.499 |
.025 |
.038 |
101.58-114.28 |
0.64 |
0.965 |
|
4.500-4.999 |
.027 |
.041 |
114.29-126.97 |
0.69 |
1.041 |
|
5.000-5.499 |
.029 |
.044 |
126.98-139.67 |
0.74 |
1.118 |
|
5.500-5.999 |
.031 |
.047 |
139.68-152.38 |
0.79 |
1.194 |
|
6.000-6.499 |
.033 |
.050 |
152.39-165.08 |
0.84 |
1.270 |
|
6.500-6.999 |
.035 |
.053 |
165.09-177.78 |
0.89 |
1.346 |
|
7.000-7.499 |
.037 |
.056 |
177.79-190.48 |
0.94 |
1.422 |
Hot-finished seamless mechanical tubing---Wall Thickness Tolerances
|
Wall ThicknessPercent of OD |
Maximum Percent Over & Under Nominal |
Wall ThicknessPercent of OD |
Maximum Percent Over & Under Nominal |
|
OD 2” and Over |
OD 50.08mm and Over |
||
|
Under 10 10 to 25 |
10.0 7.5 |
Under 10 10 to 25 |
10.0 7.5 |
In structural engineering, the tube is the system where in order to resist lateral loads (wind, seismic, etc.) a building is designed to act like a hollow cylinder, cantilevered perpendicular to the ground.
The system can be constructed using steel, concrete, or composite construction (the discrete use of both steel and concrete). It can be used for office, apartment and mixed-use buildings. Most buildings in excess of 40 stories constructed since the 1960s are of this structural type.
