Complex Shape Steel Tube is a precision-engineered steel tube designed with intricate profiles to meet specialized structural and industrial requirements. It is widely used in machinery, automotive, construction, and industrial fabrication projects.
Material Type :
Carbon Steel, Alloy Steel, Stainless Steel (Q235B, Q355B, 45#, 40Cr, 304, 316L)Wall Thickness Range :
1.5mm – 25mmLength Range :
500mm – 12000mm (Custom lengths available)Outer Size Range :
15mm – 450mm (Complex profiles: star, oval, hexagonal, multi-lobe)Tolerance :
±0.08mm ~ ±0.25mmCustomizable :
YesOrder(MOQ) :
2TSpecifications
Complex shape steel tubes are manufactured using advanced forming, rolling, and finishing techniques, ensuring accurate dimensions, consistent profiles, and superior structural strength. Various custom shapes, including multi-faceted, curved, and irregular profiles, can be produced according to project specifications.
These tubes offer excellent mechanical strength, dimensional stability, and high reliability, making them ideal for components subjected to complex loads and precise assembly requirements. Carbon steel, alloy steel, and stainless steel materials are available to suit different performance demands.
Complex shape steel tubes are widely used in industrial machinery, automotive frames, construction frameworks, transportation equipment, and specialized engineering applications, where intricate shapes, high strength, and precise performance are critical.
Complex Shape 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 Complex Shape Carbon Steel | GB Q235B
|
Tensile 370–500 MPa
|
Custom Complex Shapes: Multi-sided Polygonal, Non-symmetric Profile, Custom Contoured Tube, Tapered Tube, Stepped Tube, Tube with Internal/External Grooves/Protrusions, Custom Complex Cross-section
|
C≤0.22, Si≤0.35
|
| Q355B Low Alloy High Strength Complex Shape Steel | GB Q355B
|
Tensile ≥470 MPa
|
Custom Complex Shapes: Multi-sided Polygonal, Non-symmetric Profile, Custom Contoured Tube, Tapered Tube, Stepped Tube, Tube with Internal/External Grooves/Protrusions, Custom Complex Cross-section
|
C≤0.24, Si≤0.55
|
| Q420B High Strength Low Alloy Complex Shape Steel | GB Q420B
|
Tensile ≥520 MPa
|
Custom Complex Shapes: Multi-sided Polygonal, Non-symmetric Profile, Custom Contoured Tube, Tapered Tube, Stepped Tube, Tube with Internal/External Grooves/Protrusions, Custom Complex Cross-section
|
C≤0.20, Si≤0.55
|
| ASTM A500 Grade C Complex Shape Structural Steel | ASTM A500 Gr.C
|
Tensile ≥400 MPa
|
Custom Complex Shapes: Multi-sided Polygonal, Non-symmetric Profile, Custom Contoured Tube, Tapered Tube, Stepped Tube, Tube with Internal/External Grooves/Protrusions, Custom Complex Cross-section
|
C≤0.23, Si≤0.40
|
| ASTM A513 Grade 1020 Welded Complex Shape Steel | ASTM A513 Gr.1020
|
Tensile 380–520 MPa
|
Custom Complex Shapes: Multi-sided Polygonal, Non-symmetric Profile, Custom Contoured Tube, Tapered Tube, Stepped Tube, Tube with Internal/External Grooves/Protrusions, Custom Complex Cross-section
|
C 0.18–0.23, Si≤0.30
|
| 20# High Quality Carbon Complex Shape Steel | GB 20#
|
Tensile 415–550 MPa
|
Custom Complex Shapes: Multi-sided Polygonal, Non-symmetric Profile, Custom Contoured Tube, Tapered Tube, Stepped Tube, Tube with Internal/External Grooves/Protrusions, Custom Complex Cross-section
|
C 0.17–0.23, Si≤0.37
|
| 45# High Quality Carbon Complex Shape Steel | GB 45#
|
Tensile ≥600 MPa
|
Custom Complex Shapes: Multi-sided Polygonal, Non-symmetric Profile, Custom Contoured Tube, Tapered Tube, Stepped Tube, Tube with Internal/External Grooves/Protrusions, Custom Complex Cross-section
|
C 0.42–0.50, Si≤0.37
|
| 40Cr Alloy Complex Shape Steel | GB 40Cr
|
Tensile ≥980 MPa
|
Custom Complex Shapes: Multi-sided Polygonal, Non-symmetric Profile, Custom Contoured Tube, Tapered Tube, Stepped Tube, Tube with Internal/External Grooves/Protrusions, Custom Complex Cross-section
|
C 0.37–0.44, Si≤0.37
|
| 20CrMnTi Carburizing Complex Shape Steel | GB 20CrMnTi
|
Tensile ≥1080 MPa
|
Custom Complex Shapes: Multi-sided Polygonal, Non-symmetric Profile, Custom Contoured Tube, Tapered Tube, Stepped Tube, Tube with Internal/External Grooves/Protrusions, Custom Complex Cross-section
|
C 0.17–0.23, Si≤0.37
|
| GCr15 Bearing Complex Shape Steel | GB GCr15
|
Tensile ≥610 MPa
|
Custom Complex Shapes: Multi-sided Polygonal, Non-symmetric Profile, Custom Contoured Tube, Tapered Tube, Stepped Tube, Tube with Internal/External Grooves/Protrusions, Custom Complex Cross-section
|
C 0.95–1.05, Si≤0.40
|
| 12L14 Free Cutting Complex Shape Steel | ASTM 12L14
|
Tensile ≥420 MPa
|
Custom Complex Shapes: Multi-sided Polygonal, Non-symmetric Profile, Custom Contoured Tube, Tapered Tube, Stepped Tube, Tube with Internal/External Grooves/Protrusions, Custom Complex Cross-section
|
C≤0.15, Si≤0.10
|
| 304 Stainless Steel Complex Shape Tube | UNS S30400
|
Tensile ≥515 MPa
|
Custom Complex Shapes: Multi-sided Polygonal, Non-symmetric Profile, Custom Contoured Tube, Tapered Tube, Stepped Tube, Tube with Internal/External Grooves/Protrusions, Custom Complex Cross-section
|
C≤0.08, Cr 18.0–20.0
|
| 316 Stainless Steel Complex Shape Tube | UNS S31600
|
Tensile ≥515 MPa
|
Custom Complex Shapes: Multi-sided Polygonal, Non-symmetric Profile, Custom Contoured Tube, Tapered Tube, Stepped Tube, Tube with Internal/External Grooves/Protrusions, Custom Complex Cross-section
|
C≤0.08, Cr 16.0–18.5
|
| 304L Low Carbon Stainless Steel Complex Shape Tube | UNS S30403
|
Tensile ≥485 MPa
|
Custom Complex Shapes: Multi-sided Polygonal, Non-symmetric Profile, Custom Contoured Tube, Tapered Tube, Stepped Tube, Tube with Internal/External Grooves/Protrusions, Custom Complex Cross-section
|
C≤0.03, Cr 18.0–20.0
|
| 316L Low Carbon Stainless Steel Complex Shape Tube | UNS S31603
|
Tensile ≥485 MPa
|
Custom Complex Shapes: Multi-sided Polygonal, Non-symmetric Profile, Custom Contoured Tube, Tapered Tube, Stepped Tube, Tube with Internal/External Grooves/Protrusions, Custom Complex Cross-section
|
C≤0.03, Cr 16.0–18.5
|
| 17-4PH Precipitation Hardening Stainless Steel Complex Shape Tube | UNS S17400
|
Tensile ≥1310 MPa
|
Custom Complex Shapes: Multi-sided Polygonal, Non-symmetric Profile, Custom Contoured Tube, Tapered Tube, Stepped Tube, Tube with Internal/External Grooves/Protrusions, Custom Complex Cross-section
|
C≤0.07, Cr 15.5–17.5
|
|
Note: If you do not find a Complex Shape 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. |
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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 Complex Shape 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. |
Standard Special Shaped Steel Tube is a steel tube manufactured with non-circular cross-sectional profiles such as square, rectangular, oval, or other standard structural shapes. It is widely used in construction structures, mechanical manufacturing, transportation equipment, and industrial fabrication.
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Custom Special Shaped Steel Tube is a steel tube manufactured according to specific design requirements with non-standard cross-sectional shapes. It is widely used in construction structures, machinery manufacturing, transportation equipment, and specialized engineering applications that require customized tube profiles.
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Cold Drawn Precision Special Tube is a high-accuracy steel tube manufactured through advanced cold drawing processes with customized special cross-section shapes. It is widely used in precision machinery, automotive components, engineering structures, and industrial equipment requiring high dimensional accuracy and complex tube profiles.
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Custom Profile Special Shaped Steel Tube is a customized steel tube manufactured according to specific profile designs and technical requirements, offering flexible solutions for complex structural and industrial applications. It is widely used in construction, machinery manufacturing, automotive components, and engineering projects.
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High Precision Special Shaped Steel Tube is a precision-engineered steel tube with custom profiles, designed to meet tight dimensional tolerances and high-performance requirements. It is widely used in machinery, automotive, industrial equipment, and construction projects.
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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.
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Complex Shape Steel Tube is a precision-engineered steel tube designed with intricate profiles to meet specialized structural and industrial requirements. It is widely used in machinery, automotive, construction, and industrial fabrication projects.
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CNC Machined Special Steel Tube is a precision-engineered steel tube processed through advanced CNC machining technology, offering excellent dimensional accuracy and customized structural solutions. It is widely used in automotive, machinery, industrial equipment, and engineering applications.
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