Square tube
Square tube

Carbon welded steel pipe

Structural steel

Coated steel pipe

Stainless Steel Pipe

Seamelss steel pipe

Special metal pipe

Pipe Fitting

OCTG

Square tube
Square tube
Square tube

Square tube

Product Type:carbon steel pipe,Seamless Steel Pipe, Seamless Stainless Steel Pipe, Steel Piping;Hollow Section;Square Pipe
OD:20*20~1200*1200mm
Tinckness:2,3,4,5,6,8,10,12,14,16,18,20mm
Length:5m or Customized
Standard & Grade:ASTM A500, ASTM A53, EN 10210, EN 10219, JIS G 3466, BS 1387, BS 6323
Marterial:S235JR, S355JR, S275JR, C350LO, C250LO, G250, G350（C450LO）
Delivery:Within 30 days and Depends on your order quantity
Payment:TT, LC , OA , D/P
Packing:Waterproof Paper Wrapped, Steel Strips Bundled, Two Tags on Each Bundle
usage:In Industrial Construction, Machinery/Rack/Container manufacturing
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  • Description
  • Specification
  • Production process
  • Packaging pictures
  • Inquiry
Description

Shape:Hollow Sections: Square, Rectangular, Round, Triangular, Hexagonal, Eliptical Hollow sections

Size:
Hollow Sections:
Square:10 mmx10mm – 500 mmx500mm
Retangular:10mm x 20mm – 600mmx400mm
Round: 1/8″ – 4″
Wall Thickness: 0.5 – 20.0mm
Length:0.3 mtr – 18 mtr as customer required
Scaffolding Tube:
Outer Diameter: 38mm, 42mm, 48.3mm-48.6mm
Wall Thickness: 2.0mm, 2.5mm, 2.75mm, 3.0mm, 3.25mm, 3.85mm, 4.0mm
Length: 0.3mtr -18 mtr
Process:
Seamless: Hot Rolled, Hot Explored
Welded: ERW, HFW
Coating: Hot-dipped Galvanised, Electrical Galvanised
Raw Material:
Seamless: Pipe Billet( Hot Rolled, or Con-casting), Mother Pipe
Welded: Hot Rolled Steel Coil (HRC) , Cold Rolled Steel Coil (CRC), Pre-pained Galvanized Steel Strip
End: Square cut, Burr removed
Surface:Lightly oiled, Hot dip galvanized, Electro galvanized, Black
Heat Treatment: Bright Annealed, Black Annealed
Packing: Plastic plugs in both ends, Hexagonal bundles of max. 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips
Test: Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield
strength, Elongation), Technical Properties (Flattening Test, Flaring Test, Bending Test, Hardness Test, Blow Test, Impact Test etc), Exterior Size Inspection

Hollow Sections:

GB/T 13793 Longitudinal electric resistance welded steel tubes

GB/T 6728 Cold formed steel hollow sections for general structure–Dimensions,shapes,weight and permissble deviations

ASTM A500 Cold Formed Welded and Seamless Carbon Steel Steel Structural Tubing in Round and Shapes

ASTM A 53 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

EN 10210 Hot finished structural hollow sections of non-alloy and fine grain structural steels

EN 10219 Cold formed welded structural hollow sections of non-alloy and fine grain steels

JIS G 3466 Carbon steel Square for general structural purposes

BS 1387 Steel Tubes for use for Water, Gas, Air and Steam

BS 6323 PART5 SEAMLESS AND WELDED STEEL TUBES FOR AUTOMOBILE MECHANICAL AND GENERAL ENGINEER PURPOSE

IS : 1161 Steel Tubes For Structural purpose and Electric poles.

IS : 3601 Steel tubes for mechanical & general engineering purposes.

IS : 3074 Steel tubes for Automobile purpose.

IS : 4923 Steel tubes for Hollow sections used in structures

DIN 1626 WELDED CIRCULAR TUBES OF NON ALLOY STEELS WITH

SPECIAL QUALITY EQUIREMENTS

DIN 2394 WELDED AND SIZED PRECISION STEEL TUBES

Scaffolding Tube:

GB 15831 Steel tube scaffold couplers

EN 39 Loose steel tubes for tube and coupler scaffolds

BS 1139 Metal scaffolding

Steel Grade:

GB/T 13793, GB/T 6728, GB 15831:

Q195, Q215, Q235, Q275, Q295, Q345, 08F, 08, 08AL, 08F, 10F, 10, HG5, DF08

EN 10210, EN 10219, BS 1387: S185, S235, S235JR, S235 G2H, S275, S275JR, S355JRH, S355J2H, St12, St13, St14, St33, St37, St44,ST52

ASTM A500, ASTM A 53: Gr. A, Gr B, Gr C, Gr.D, DC01, DC03, 1008, 1010

JIS G 3466: SS330, SS440, SS490, SPHD, SPHE

Specification

Square tubes sizes

Size (mm)

Wall Thickness (mm)

Size (mm)

Wall Thickness (mm)

20*20

1.2

70*70

60*80

100*40

1.8

1.3

2

1.4-1.5

2.2

1.7

2.3

1.8

2.5-4.0

2

4.5-5.0

2.2

5.5-5.75

2.3

75*75

60*90

100*50

1.8

2.5-2.75

2

25*25

20*30

1.2

2.2

1.3

2.3

1.5

2.5-4.0

1.7

4.5-5.0

1.8

5.5-5.75

2

80*80

100*60

100*80

120*60

2

2.3-2.3

2.2

2.5-3.0

2.3

30*30

30*40

25*40

20*40

1

2.5-4.0

1.2

4.5-5.0

1.3

5.5-5.75

1.5

7.5-7.75

1.7

100*100

120*80

2

1.8

2.2

2

2.3

2.2

2.5-5.0

2.3

5.5-5.75

2.5*2.75

7.5-7.75

3

120*120

140*80

150*100

160*80

2.5

40*40

30*50

25*50

1.2

2.75

1.3

3

1.4-1.5

3.25-5.0

1.7

5.5-7.0

1.8

7.5-7.75

2

140*140

150*150

200*100

3.5-4.0

2.2-2.3

4.5-5.0

2.5-4.0

5.25-7.0

50*50

60*40

30*60

40*50

1.5

7.5-7.75

1.7

160*160

180*180

3

1.8

3.5

2

3.75

2.2

4.0-5.0

2.3

5.25-5.75

2.5*-4.0

7.5-7.75

4.25-5.0

60*60

40*80

75*75

50*70

50*80

2.3

60*60

40*80

75*45

50*70

50*80

1.5

2.5-4.0

1.7

4.25-5.0

1.8

5.5-5.75

2

/

2.2-2.3

/



vailable Quality Standards

ASTM A500 Cold Formed Welded and Seamless Carbon Steel Steel Structural Tubing in Round and Shapes

EN 10210 Hot finished structural hollow sections of non-alloy and fine grain structural steels

EN 10219 Cold formed welded structural hollow sections of non-alloy and fine grain steels

ASTM A53 used as structural steel or for low-pressure plumbing

Standard Corner Radius(Structural Sizes:)
Max. 3 x Nominal Wall Thickness

Mechanical Sizes

Structural Sizes

Largest Nominal Outside Dimension

Outside Tolerance at all Sides at Corners

Largest Nominal Outside Dimension

Outside Tolerance at all Sides at Corners

3/16 to 5/8

± 0.004

2 1/2 and under

± 0.020

over 5/8 to 1 1/8

± 0.005

over 2 1/2 to 3 1/2

± 0.020

over 1 1/8 to 1 1/2

± 0.006

over 3 1/2 to 5 1/2

± 0.030

over 1 1/2 to 2

± 0.008

over 5 1/2

± 1%

over 2 to 3

± 0.010

over 3 to 4

± 0.020

over 4 to 6

± 0.020

over 6 to 8

± 0.025

Straightness
Mechanical Sizes: Max. 1/16″ in 3 feet
Structural Sizes: Max. 1/8″ x Number of feet of total length divided by 5

Wall Thickness

Mechanical & Structural Sizes: ± 10% of Nominal Wall Thickness

Squareness of Sides
Mechanical Sizes: Max: ± b = c x 0.006″
b = Tolerance for out-of-square
c = Largest external dimension across flats
Structural Sizes: Adjacent sides may deviate from 90 ° by ± 2 °

Maximum Twist (Mechanical & Structural Sizes)

Largest Dimension, inches

Max. Twist*, inches

over 1/2 to 1 1/2

0.050

over 1 1/2 to 2 1/2

0.062

over 2 1/2 to 4

0.075

over 4 to 6

0.087

over 4 to 8

0.100

 Convexity & Concavity(Mechanical & Structural Sizes)

Largest Nominal O.D., Inches

Tolerance ± Inches

2 1/2 and under

± 0.010

over 2 1/2 to 4

± 0.015

over 4 to 8

± 0.025

Structural Tubing A 500 Requirements

Grades

Chemical

Physical

C Max. %

Mn Max. %

P Max. %

S Max. %

Cu Max. %

Tensile strength, min. psi

Yield strength, min. psi

Elongation in 2 in.

Grade B

0.26

/

0.04

0.05

0.20

58,000

46,000

23

Grade C

0.23

1.35

0.04

0.05

0.20

62,000

50,000

21



Production process
RHS-SHS-manufacturing-Process - www.metallicsteel.com
Packaging pictures
Inquiry

If you have any inquiries and questions, please contact CONTINENTAL STEEL CO.,LTD. at any time. Thanks in advance. Welcome!

Send Email
Specification

Square tubes sizes

Size (mm)

Wall Thickness (mm)

Size (mm)

Wall Thickness (mm)

20*20

1.2

70*70

60*80

100*40

1.8

1.3

2

1.4-1.5

2.2

1.7

2.3

1.8

2.5-4.0

2

4.5-5.0

2.2

5.5-5.75

2.3

75*75

60*90

100*50

1.8

2.5-2.75

2

25*25

20*30

1.2

2.2

1.3

2.3

1.5

2.5-4.0

1.7

4.5-5.0

1.8

5.5-5.75

2

80*80

100*60

100*80

120*60

2

2.3-2.3

2.2

2.5-3.0

2.3

30*30

30*40

25*40

20*40

1

2.5-4.0

1.2

4.5-5.0

1.3

5.5-5.75

1.5

7.5-7.75

1.7

100*100

120*80

2

1.8

2.2

2

2.3

2.2

2.5-5.0

2.3

5.5-5.75

2.5*2.75

7.5-7.75

3

120*120

140*80

150*100

160*80

2.5

40*40

30*50

25*50

1.2

2.75

1.3

3

1.4-1.5

3.25-5.0

1.7

5.5-7.0

1.8

7.5-7.75

2

140*140

150*150

200*100

3.5-4.0

2.2-2.3

4.5-5.0

2.5-4.0

5.25-7.0

50*50

60*40

30*60

40*50

1.5

7.5-7.75

1.7

160*160

180*180

3

1.8

3.5

2

3.75

2.2

4.0-5.0

2.3

5.25-5.75

2.5*-4.0

7.5-7.75

4.25-5.0

60*60

40*80

75*75

50*70

50*80

2.3

60*60

40*80

75*45

50*70

50*80

1.5

2.5-4.0

1.7

4.25-5.0

1.8

5.5-5.75

2

/

2.2-2.3

/



vailable Quality Standards

ASTM A500 Cold Formed Welded and Seamless Carbon Steel Steel Structural Tubing in Round and Shapes

EN 10210 Hot finished structural hollow sections of non-alloy and fine grain structural steels

EN 10219 Cold formed welded structural hollow sections of non-alloy and fine grain steels

ASTM A53 used as structural steel or for low-pressure plumbing

Standard Corner Radius(Structural Sizes:)
Max. 3 x Nominal Wall Thickness

Mechanical Sizes

Structural Sizes

Largest Nominal Outside Dimension

Outside Tolerance at all Sides at Corners

Largest Nominal Outside Dimension

Outside Tolerance at all Sides at Corners

3/16 to 5/8

± 0.004

2 1/2 and under

± 0.020

over 5/8 to 1 1/8

± 0.005

over 2 1/2 to 3 1/2

± 0.020

over 1 1/8 to 1 1/2

± 0.006

over 3 1/2 to 5 1/2

± 0.030

over 1 1/2 to 2

± 0.008

over 5 1/2

± 1%

over 2 to 3

± 0.010

over 3 to 4

± 0.020

over 4 to 6

± 0.020

over 6 to 8

± 0.025

Straightness
Mechanical Sizes: Max. 1/16″ in 3 feet
Structural Sizes: Max. 1/8″ x Number of feet of total length divided by 5

Wall Thickness

Mechanical & Structural Sizes: ± 10% of Nominal Wall Thickness

Squareness of Sides
Mechanical Sizes: Max: ± b = c x 0.006″
b = Tolerance for out-of-square
c = Largest external dimension across flats
Structural Sizes: Adjacent sides may deviate from 90 ° by ± 2 °

Maximum Twist (Mechanical & Structural Sizes)

Largest Dimension, inches

Max. Twist*, inches

over 1/2 to 1 1/2

0.050

over 1 1/2 to 2 1/2

0.062

over 2 1/2 to 4

0.075

over 4 to 6

0.087

over 4 to 8

0.100

 Convexity & Concavity(Mechanical & Structural Sizes)

Largest Nominal O.D., Inches

Tolerance ± Inches

2 1/2 and under

± 0.010

over 2 1/2 to 4

± 0.015

over 4 to 8

± 0.025

Structural Tubing A 500 Requirements

Grades

Chemical

Physical

C Max. %

Mn Max. %

P Max. %

S Max. %

Cu Max. %

Tensile strength, min. psi

Yield strength, min. psi

Elongation in 2 in.

Grade B

0.26

/

0.04

0.05

0.20

58,000

46,000

23

Grade C

0.23

1.35

0.04

0.05

0.20

62,000

50,000

21



Production process
RHS-SHS-manufacturing-Process - www.metallicsteel.com
Packaging pictures
Inquiry

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