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Special Shape Steel Pipe
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Structural Special Shaped Steel Tube

Structural Special Shaped Steel Tube

Structural Special Shaped Steel Tube is a high-strength steel tube with customized profiles, designed for structural and engineering applications requiring reliable load-bearing performance. It is widely used in construction, industrial frameworks, machinery, and infrastructure projects.

  • Material Type :

    Structural Carbon & Alloy Steel (Q235B, Q355B, Q345B)
  • Wall Thickness Range :

    2.0mm – 22mm
  • Length Range :

    1000mm – 12000mm (Custom length acceptable)
  • Outer Size Range :

    12mm – 420mm
  • Tolerance :

    ±0.10mm ~ ±0.20mm
  • Customizable :

    Yes
  • Order(MOQ) :

    2T

Specifications

 

Structural special shaped steel tubes are manufactured using precision forming and fabrication processes, ensuring consistent dimensions, structural stability, and superior mechanical strength. Custom shapes such as rectangular, square, oval, or other profiles can be produced according to project requirements.

 

These tubes offer excellent load-bearing capacity, weldability, and durability, making them ideal for structural components, support frameworks, and mechanical assemblies. High-quality carbon steel, alloy steel, and stainless steel grades are available to meet specific engineering standards.

 

Structural special shaped steel tubes are widely used in building frameworks, industrial machinery, transportation structures, bridges, and infrastructure projects, where structural integrity, customized shapes, and reliable performance are essential.

 

Structural Special Shaped Steel Tube is one of our core strength products. We maintain substantial inventory to ensure rapid delivery and can also customize extra-large diameter seamless pipes according to your specific requirements. Additionally, we provide comprehensive services including spectroscopic analysis, mechanical property testing, pressure testing, and non-destructive testing (NDT).

 

Grade Grade Equivalent Mechanical Properties Size Range Chemical Composition (Typical, %)
Q235B Structural Carbon Steel GB Q235B
 
ASTM A500 Gr.A
 
EN S235JRH
Tensile 370–500 MPa
 
Yield ≥235 MPa
 
Elongation ≥26%
 
Hardness 137–187 HB
Custom Shapes: Square, Rectangular, Oval, Triangular, Hexagonal, Octagonal, D-shaped, U-shaped, Custom Structural Profile
 
Side Length/OD 10–400 mm
 
WT 1.0–16 mm
 
Length 6–12 m
 
Custom Sizes & Shapes Available
C≤0.22, Si≤0.35
 
Mn≤1.40, P≤0.045, S≤0.045
Q355B Low Alloy High Strength Structural Steel GB Q355B
 
ASTM A500 Gr.B
 
EN S355J2H
Tensile ≥470 MPa
 
Yield ≥355 MPa
 
Elongation ≥21%
 
Hardness 140–190 HB
Custom Shapes: Square, Rectangular, Oval, Triangular, Hexagonal, Octagonal, D-shaped, U-shaped, Custom Structural Profile
 
Side Length/OD 10–400 mm
 
WT 1.0–16 mm
 
Length 6–12 m
 
Custom Sizes & Shapes Available
C≤0.24, Si≤0.55
 
Mn≤1.60, P≤0.035, S≤0.035
Q420B High Strength Low Alloy Structural Steel GB Q420B
 
ASTM A572 Gr.60
 
EN S420NL
Tensile ≥520 MPa
 
Yield ≥420 MPa
 
Elongation ≥19%
 
Hardness 150–200 HB
Custom Shapes: Square, Rectangular, Oval, Triangular, Hexagonal, Octagonal, D-shaped, U-shaped, Custom Structural Profile
 
Side Length/OD 10–350 mm
 
WT 2.0–16 mm
 
Length 6–12 m
 
Custom Sizes & Shapes Available
C≤0.20, Si≤0.55
 
Mn≤1.70, P≤0.030, S≤0.030
ASTM A500 Grade C Structural Steel ASTM A500 Gr.C
 
ASME SA500 Gr.C
 
EN S275J2H
Tensile ≥400 MPa
 
Yield ≥315 MPa
 
Elongation ≥25%
 
Hardness 140–190 HB
Custom Shapes: Square, Rectangular, Oval, Triangular, Hexagonal, Octagonal, D-shaped, U-shaped, Custom Structural Profile
 
Side Length/OD 10–400 mm
 
WT 1.0–16 mm
 
Length 6–12 m
 
Custom Sizes & Shapes Available
C≤0.23, Si≤0.40
 
Mn≤1.35, P≤0.035, S≤0.040
ASTM A513 Grade 1020 Welded Structural Steel ASTM A513 Gr.1020
 
ASME SA513 Gr.1020
 
EN C20
Tensile 380–520 MPa
 
Yield ≥205 MPa
 
Elongation ≥25%
 
Hardness 121–174 HB
Custom Shapes: Square, Rectangular, Oval, Triangular, Hexagonal, Octagonal, D-shaped, U-shaped, Custom Structural Profile
 
Side Length/OD 10–350 mm
 
WT 1.0–12 mm
 
Length 6–12 m
 
Custom Sizes & Shapes Available
C 0.18–0.23, Si≤0.30
 
Mn 0.30–0.60, P≤0.040, S≤0.050
20# High Quality Carbon Structural Steel GB 20#
 
ASTM A106 Gr.B
 
EN C22
Tensile 415–550 MPa
 
Yield ≥245 MPa
 
Elongation ≥21%
 
Hardness 156–207 HB
Custom Shapes: Square, Rectangular, Oval, Triangular, Hexagonal, Octagonal, D-shaped, U-shaped, Custom Structural Profile
 
Side Length/OD 6–250 mm
 
WT 1.0–10 mm
 
Length 6–12 m
 
Custom Sizes & Shapes Available
C 0.17–0.23, Si≤0.37
 
Mn 0.35–0.65, P≤0.035, S≤0.035
45# High Quality Carbon Structural Steel GB 45#
 
ASTM 1045
 
EN C45
Tensile ≥600 MPa
 
Yield ≥355 MPa
 
Elongation ≥16%
 
Hardness 170–229 HB
Custom Shapes: Square, Rectangular, Oval, Triangular, Hexagonal, Octagonal, D-shaped, U-shaped, Custom Structural Profile
 
Side Length/OD 10–250 mm
 
WT 1.5–12 mm
 
Length 6–12 m
 
Custom Sizes & Shapes Available
C 0.42–0.50, Si≤0.37
 
Mn 0.50–0.80, P≤0.035, S≤0.035
40Cr Alloy Structural Steel GB 40Cr
 
ASTM 5140
 
EN 41Cr4
Tensile ≥980 MPa
 
Yield ≥785 MPa
 
Elongation ≥9%
 
Hardness 207–269 HB
Custom Shapes: Square, Rectangular, Oval, Triangular, Hexagonal, Octagonal, D-shaped, U-shaped, Custom Structural Profile
 
Side Length/OD 10–250 mm
 
WT 1.5–12 mm
 
Length 6–12 m
 
Custom Sizes & Shapes Available
C 0.37–0.44, Si≤0.37
 
Mn 0.50–0.80, Cr 0.80–1.10, P≤0.035, S≤0.035
304 Stainless Steel Structural Tube UNS S30400
 
EN 1.4301
 
GB 06Cr19Ni10
Tensile ≥515 MPa
 
Yield ≥205 MPa
 
Elongation ≥40%
 
Corrosion Resistant
 
Hardness ≤187 HB
Custom Shapes: Square, Rectangular, Oval, Triangular, Hexagonal, Octagonal, D-shaped, U-shaped, Custom Structural Profile
 
Side Length/OD 6–250 mm
 
WT 0.8–10 mm
 
Length 6–12 m
 
Custom Sizes & Shapes Available
C≤0.08, Cr 18.0–20.0
 
Ni 8.0–11.0, Mn≤2.0, P≤0.045, S≤0.030
316 Stainless Steel Structural Tube UNS S31600
 
EN 1.4401
 
GB 06Cr17Ni12Mo2
Tensile ≥515 MPa
 
Yield ≥205 MPa
 
Elongation ≥40%
 
Superior Corrosion Resistant
 
Hardness ≤187 HB
Custom Shapes: Square, Rectangular, Oval, Triangular, Hexagonal, Octagonal, D-shaped, U-shaped, Custom Structural Profile
 
Side Length/OD 6–250 mm
 
WT 0.8–10 mm
 
Length 6–12 m
 
Custom Sizes & Shapes Available
C≤0.08, Cr 16.0–18.5
 
Ni 10.0–14.0, Mo 2.0–3.0, Mn≤2.0, P≤0.045, S≤0.030
304L Low Carbon Stainless Steel Structural Tube UNS S30403
 
EN 1.4306
 
GB 022Cr19Ni10
Tensile ≥485 MPa
 
Yield ≥170 MPa
 
Elongation ≥40%
 
Intergranular Corrosion Resistant
 
Hardness ≤187 HB
Custom Shapes: Square, Rectangular, Oval, Triangular, Hexagonal, Octagonal, D-shaped, U-shaped, Custom Structural Profile
 
Side Length/OD 6–250 mm
 
WT 0.8–10 mm
 
Length 6–12 m
 
Custom Sizes & Shapes Available
C≤0.03, Cr 18.0–20.0
 
Ni 8.0–12.0, Mn≤2.0, P≤0.045, S≤0.030
316L Low Carbon Stainless Steel Structural Tube UNS S31603
 
EN 1.4404
 
GB 022Cr17Ni12Mo2
Tensile ≥485 MPa
 
Yield ≥170 MPa
 
Elongation ≥40%
 
Superior Intergranular Corrosion Resistant
 
Hardness ≤187 HB
Custom Shapes: Square, Rectangular, Oval, Triangular, Hexagonal, Octagonal, D-shaped, U-shaped, Custom Structural Profile
 
Side Length/OD 6–250 mm
 
WT 0.8–10 mm
 
Length 6–12 m
 
Custom Sizes & Shapes Available
C≤0.03, Cr 16.0–18.5
 
Ni 10.0–15.0, Mo 2.0–3.0, Mn≤2.0, P≤0.045, S≤0.030

Note: If you do not find a Structural Special Shaped Steel Tube that meets your requirements or is suitable for your customer’s project, please contact our manager sales consultant (Email: stsalesman4@stmetal001.com) and send us your specifications and technical parameter files to obtain Customized quotation plan.

 

Video

 

 

Factory

  • Structural Special Shaped Steel Tube
  • Structural Special Shaped Steel Tube
  • Structural Special Shaped Steel Tube
  • Structural Special Shaped Steel Tube
  • Structural Special Shaped Steel Tube
  • Structural Special Shaped Steel Tube
  •  

FAQs

Q: What types and standards of carbon steel do you mainly supply?

A: We mainly supply a wide range of carbon steel products including seamless and welded steel pipes, steel plates, coils, and bars. Common carbon steel grades include A36, A106, A53, API 5L, and S355, which are widely used in construction, machinery, and pipeline engineering. All carbon steel products comply with international standards such as ASTM, API, EN, and JIS. We can also provide corresponding material test certificates (MTC) and support customized specifications according to customer project requirements.

 

Q: Can you provide special specifications or non-standard customization? For example, extra-wide plates or pipes with specific wall thicknesses?

A: Of course. One of our advantages is our flexible customization capabilities. We can provide customized size cutting, special thicknesses, and special surface treatments (such as 2B, BA, No.4 brushed finish, mirror finish) based on your drawings or requirements. Whether it's a small trial order or a large-volume purchase, we can meet your needs.

 

Q: How do you guarantee the quality and consistency of materials? Do you have quality certifications?

A: Quality is our lifeline. We use direct supply from large steel mills to ensure material traceability. Each shipment comes with a Material Quality Certificate (MTC). We have our own quality control team that conducts random checks on material composition, dimensional tolerances, surface finish, and mechanical properties. Our factory is also ISO 9001:2015 quality management system certified.

 

Q: What are your delivery times and logistics solutions for overseas customers?

A: For standard-specification in-stock products, we can complete preparation and shipment within 7-14 days. Delivery times for customized products will be determined through negotiation based on the specific process. We have established international logistics partners who can arrange full container load (FCL), less-than-container load (LCL), or air freight according to your needs, and provide various trade terms such as EXW, FOB, CIF, and DDP, with door-to-door service.

 

Q: As a new customer, how do I begin cooperation? Can you provide samples for testing? 

A: The cooperation process is very smooth: 1) You provide specific requirements (brand, specifications, quantity, standards); 2) We provide a quotation and technical advice; 3) After confirmation, we arrange the contract and payment; 4) Production/pickup and quality inspection; 5) Shipment and provision of documentation. We encourage sample testing. For serious customers, we can provide small-size samples to ensure that the materials fully meet your processing and application requirements.

 

Note: If you do not find a Structural Special Shaped Steel Tube that meets your requirements or is suitable for your customer’s project, please contact our manager sales consultant (Email: stsalesman4@stmetal001.com) and send us your specifications and technical parameter files to obtain Customized quotation plan.

 

  • Why Choose Us
    Why Choose Us
    Over 20 years of experience in steel manufacturing, offering a comprehensive product range and one-stop supply solutions. Committed to long-term cooperation and reliable service for global partners.
  • Production & Quality Control
    Production & Quality Control
    Stable production capacity supported by an experienced technical team. Strict quality management with ISO-compliant inspections and optional third-party testing (SGS, TÜV, CE).
  • Packing & Shipping
    Packing & Shipping
    Flexible and secure packaging tailored to product type and customer requirements. Fast and reliable delivery with standard stock in 2 weeks and custom orders scheduled per specifications.
  • Certificate & Compliance
    Certificate & Compliance
    ISO9001 certified with full support for international standards. We provide material certificates (MTC) and third-party inspections to ensure compliance and customer confidence.

 

Request A Quote
For inquiries about our steel products, please submit your contact details. Our experts will respond promptly with solutions and support.

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Request A Quote
For inquiries about our steel products, please submit your contact details. Our experts will respond promptly with solutions and support.
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