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Mechanical Tube

Mechanical Tube, Structure Tube, Seamless Mechanical Tubing, Seamless Structure Tube, 

Precision Mechanical Tube, Seamless Precision 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.


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