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High Quality Carbon Steel Square & Rectangular Pipe
Square & Rectangular Hollow Section

High Quality Carbon Steel Square & Rectangular Pipe

Brief introduction:
Square & Rectangular Hollow Section stock of 50,000 TONS

  • Grade: ASTM A500, S235JR,S355JR, Q235B, Q355B, SS400
  • Size: 25x25-500x500mm, as per customer's requirement
  • Surface treatment: black, hot-dipped galvanizing,oiling, painting, etc.
  • Length: 4-12m,customizable
  • Packing: standard sea-worthy packaging
  • Delivery date: in stock, ships immediately
  • Why Choose Us We are a professional black square/rectangular tube manufacturer with strict quality control, competitive factory prices, and global shipping support. Custom sizes, OEM/ODM, and technical guidance available.We support standard export packaging and flexible delivery, providing reliable customized steel pipe solutions for global clients with factory competitive prices.

Specifications

1. Grade: ASTM A500,EN10025,S235JR,S355JR,A36,Q235, Q355, SS400
2. Size: 25x25-500x500mm, as per customer's requirement
3. Surface treatment: black
4. Length: 4-12m,customizable
5. Packing: standard sea-worthy packing
6. Service: punching, painting, galvanizing, cutting, welding, etc.

SIZE

 MM

THICKNESS

MM

SIZE

MM

THICKNESS

MM

25x25

1.5-2.5

25x50

1.7-4.0

30x30

1.5-2.8

30x50

1.7-4.0

40x40

1.7-4.0

30x60

1.7-5.0

50x50

1.7-5.0

40x50

1.7-5.0

60x60

1.8-6.0

40x60

1.7-5.0

70x70

1.8-6.0

40x80

1.8-6.0

75x75

1.8-6.0

50x100

1.8-6.0

80x80

1.8-6.0

60x120

2.0-6.0

90x90

2.0-6.0

50x150

2.2-8.0

100x100

2.2-8.0

75x125

2.2-8.0

120x120

4.0-12.0

80x120

2.2-8.0

150x150

2.75-12.0

80x160

4.0-12.0

160x160

4.0-12.0

100x200

2.75-12.0

200x200

4.0-12.0

150x200

4.0-12.0

250x250

4.0-12.0

150x250

4.0-12.0

300x300

5.75-12.0

100x300

4.0-12.0

400x400

6.0-12.0

200x400

4.0-12.0

ASTM A500 Square& Rectangular Pipe - Chemical Composition by Grade

Element

Grade B (%)

Grade C (%)

Carbon (C)

0.26 max

0.26 max

Manganese (Mn)

1.20 max

1.20 max

Phosphorus (P)

0.035 max

0.035 max

Sulfur (S)

0.035 max

0.035 max

Silicon (Si)

0.15–0.40

0.15–0.40

Copper (Cu)

0.20 max (opt.)

0.20 max (opt.)

Nickel (Ni)

0.30 max (opt.)

0.30 max (opt.)

Chromium (Cr)

0.30 max (opt.)

0.30 max (opt.)

ASTM A500 Square& Rectangular Pipe-Mechanical Properties

Property

Grade B

Grade C

Yield Strength(MPa/ksi)

290 MPa/42 ksi

317 MPa/46 ksi

Tensile Strength(MPa/ksi)

414-534 MPa/60-77 ksi

450-565 MPa/65-82 ksi

Elongation(%)

20%min

18%min

Bend Test

Pass  180°

Pass  180°

Product display

  • black-pipe-1
    Steel pipe production line
  • black-pipe-1
    Steel pipe warehouse
  • black-pipe-1
    Steel pipe oiling
  • black-pipe-1
    Steel pipe PVC packaging
  • black-pipe-1
    Loaded into container
  • black-pipe-1
    Transported to the port
  • black-pipe-1
    In the port yard

Shipping process

product-description1

Free quality inspection report

  • quality-inspection-report1
  • quality-inspection-report2

Exhibition

Company Certificate

  • Alliance-Member-OF-Tianjin-Metal-Materials-Industry-Association
    CE
  • Alliance-Member-OF-Tianjin-Metal-Materials-Industry-Association
    ISO14001:2015
  • Alliance-Member-OF-Tianjin-Metal-Materials-Industry-Association
    ISO9001:2015
  • Alliance-Member-OF-Tianjin-Metal-Materials-Industry-Association
    Alliance Member OF Tianjin Metal Materials Industry Association
  • Alliance-Member-OF-Tianjin-Metal-Materials-Industry-Association
    Alliance of China Steel Export
  • Alliance-Member-OF-Tianjin-Metal-Materials-Industry-Association
    China National Association of Metal Material Trade

FAQ

Q: Are you a manufacturer?
A: Absolutely. We are a direct manufacturer with our own large-scale facility located in Tianjin, China. You are more than welcome to visit us!

Q: Can I place a trial order for just a few tons?
A: Certainly. We value every partner regardless of the order size. We can easily arrange an LCL (Less than Container Load) shipment to accommodate your specific needs.

Q: Is the sample free of charge?
A: Yes, we provide samples for free so you can verify our quality. We only ask the buyer to cover the courier cost.

Q: How long is the delivery time?
A: Most sizes are in stock and can be shipped immediately.

contact us

allen-cao

ED Director

Allen Cao

allen@tbfsteel.com+86 15620599032
allen-cao

Sales Manager

Razvan Zhang

razvan@tbfsteel.com+86 18522511443
Ivy-He

Sales Manager

Ivy He

ivyhe@tbfsteel.com+86 15230991051
allen-cao

Sales Supervisor

Ella Zhang

ella@tbfsteel.com+86 18132024471
allen-cao

Sales Supervisor

Lloyd Chen

lloyd@tbfsteel.com+86 17362171982
allen-cao

Sales Supervisor

Muller Wang

muller@tbfsteel.com+86 17828149248
allen-cao

Sales Supervisor

Finn Zhao

finn@tbfsteel.com+86 15002218013
allen-cao

Sales Supervisor

Sun Yin

sun@tbfsteel.com+86 15633231197
allen-cao

Sales Supervisor

Anna Yang

anna@tbfsteel.com+86 18602238776

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