Special Profile Steel Tube - Custom Shapes for Industrial Applications

Kuaima Steel Co., Ltd.

Verified Custom manufacturer 7yrs

Technical Specifications of Special Profile Steel Tube

Property	Parameter	Description
Product Name	Special Profile Steel Tube	Non-standard shaped hollow steel sections
Material Grade	Q235B / Q345B / S235JR / S355J2 / ASTM A500	Multiple carbon steel grade options
Standard Compliance	EN 10219, EN 10210, ASTM A500, GB/T 6728	Meets major international standards
Manufacturing Process	Cold Formed / Hot Finished / Welded	Process selected based on profile complexity
Carbon (C)	≤0.20% (Q235B) / ≤0.22% (S355J2)	Carbon content varies by grade
Manganese (Mn)	≤1.40% (Q235B) / ≤1.60% (S355J2)	Improves strength and hardenability
Silicon (Si)	≤0.35%	Deoxidizer for steel quality
Tensile Strength	370-630 MPa	Varies by material grade selected
Yield Strength	235-355 MPa	Minimum yield per applicable standard
Elongation	≥20%	Ductility in 50mm gauge length
Profile Shapes	D-shape, Oval, Hexagonal, Triangular, Semi-circular, Flat-sided oval	Custom irregular cross-section profiles available
Dimension Range	20mm - 500mm (max cross-section)	Outer dimension range per profile type
Wall Thickness	1.0mm - 20mm	Standard and custom wall thickness
Length	5.8m - 12m or custom	Standard and cut-to-length options
Surface Finish	Black, Galvanized, Painted, Powder Coated	Multiple surface treatment options
Application	Architecture, Automotive, Machinery, Furniture, Railing	Structural and decorative applications
Certification	EN 10204 3.1, ISO 9001, CE Marking	Quality certifications provided
Packaging	Bundled with steel strips, plastic caps on ends	Standard export packaging
MOQ	5 tons	Minimum order quantity

Special Profile Steel Tube - Custom Shapes for Industrial Applications

Special profile steel tube refers to hollow steel sections manufactured in non-standard geometric shapes beyond conventional round, square, or rectangular forms. These custom-shaped tubes serve critical roles in architectural frameworks, automotive chassis components, machinery structural parts, and conveyor systems where standard profiles cannot meet precise design or load-bearing requirements. As a mill-direct supplier with over 15 years of fabrication experience, we deliver special profile steel tubes engineered to exact dimensional tolerances for demanding industrial projects worldwide.

What Is Special Profile Steel Tube?

A special profile steel tube is a hollow structural section produced in irregular or non-standard cross-sectional geometries—including elliptical, D-shaped, triangular, hexagonal, semi-circular, flat-oval, and other custom configurations. Unlike conventional tubular products, these profiles are formed through dedicated roll-forming dies or cold-drawing processes to achieve precise, application-specific shapes that optimize material distribution and structural efficiency.

Special Profile Steel Tube Technical Specifications

Our special profile steel tubes are manufactured according to EN 10219-1:2006 for cold-formed welded sections and ASTM A500/A500M-21 for structural tubing. Key parameters include:

Parameter	Range
Material Grades	Q235B, Q345B, S235JRH, S355J2H, ASTM A500 Grade B/C
Wall Thickness	1.0 mm – 25.0 mm (±0.15 mm tolerance)
Outer Dimension	20 mm – 500 mm (varies by profile geometry)
Length	1,000 mm – 12,000 mm, or cut-to-length
Yield Strength	235 MPa – 460 MPa depending on grade
Surface Finish	Black, galvanized (per ASTM A123), painted, or oiled

Key Advantages of Custom Profile Steel Tubes

Optimized Load Distribution: Non-standard cross-sections allow engineers to align material precisely with directional stress paths, reducing overall weight by up to 20% compared to standard sections.
Enhanced Aesthetic Integration: Elliptical and D-shaped profiles deliver sleek visual lines for architectural facades and exposed structural elements.
Improved Assembly Efficiency: Purpose-designed profiles eliminate secondary machining, enabling direct bolt-on or weld-on connections in modular frames.
Versatile Material Options: Available in carbon steel, low-alloy high-strength steel, and weathering steel (Corten A/B per EN 10025-5:2004) to match environmental demands.

Frequently Asked Questions

What is the minimum order quantity (MOQ) for special profile steel tubes?

Our standard MOQ starts at 5 metric tons per profile shape. For new die development on unique geometries, we require a minimum commitment of 10 tons to offset tooling costs.

Special profile steel tube supplier

Do you provide material test certificates?

Yes. Every shipment includes EN 10204 Type 3.1 mill test certificates documenting chemical composition, mechanical properties, and dimensional inspection results traceable to the production heat.

What is the typical delivery time for custom shaped tubes?

Standard profiles in stock ship within 7–10 business days. Fully custom special profile steel tube orders with new tooling typically require 25–35 days from design approval to dispatch.

Can you produce profiles based on our own CAD drawings?

Absolutely. Our engineering team accepts DXF, DWG, and STEP files. We evaluate feasibility, recommend optimal wall thickness and grade selection, and manufacture trial samples before full production runs.

Get a Competitive Quote for Special Profile Steel Tube

Whether you need elliptical tubes for architectural curtain walls, D-shaped sections for conveyor rail systems, or entirely custom geometries for specialized machinery, our factory-competitive pricing and dedicated technical support ensure your project specifications are met with precision. Contact our sales team today with your drawings or dimensional requirements to receive a detailed quotation within 24 hours.

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Ratings & Reviews

5.0

Very satisfied

Based on 8 reviews for verified purchases

Supplier service

5.0

On-time shipment

5.0

Supplier service

5.0

Robert Brown

United Kingdom

verified purchases

2025-02-23

Acceptable Quality Custom Tubes — Initial Tolerance Issue Resolved
Placed a 10-ton order of custom semi-circular special profile steel tubes, S355J2H grade, 3.5mm wall thickness, 180mm outer diameter, for a machinery guarding application. On first delivery inspection, wall thickness on approximately 15% of pieces measured 3.32mm—outside the stated ±0.15mm tolerance band. Raised this with the sales team and received a response within 4 hours. The supplier arranged a replacement batch for the non-conforming pieces at no additional cost and provided updated inspection records within 8 business days. The replacement material measured consistently within tolerance. EN 10204 3.1 certificates were provided for both batches. The resolution process was handled professionally and the final installed material performs as required. Marking this as a resolved quality event—we will consider a follow-up order but will request pre-shipment dimensional inspection reports going forward.

Wei Chen

Singapore

verified purchases

2025-03-11

Reliable Custom Profile Tubes for Regional Distribution
Sourced 20 tons of mixed special profile steel tubes—combination of D-shaped and flat-oval sections in Q345B, wall thicknesses 2mm and 3mm—for redistribution to fabricators across Southeast Asia. EN 10204 3.1 certificates were complete and traceable to individual production heats, which our downstream customers require. Dimensional consistency across the mixed order was good; both profile geometries held tolerance well. Packaging was adequate for container shipment though two bundles showed minor strapping looseness on arrival—no material damage resulted but worth noting for future orders. Price per ton was competitive for certified mill-direct material at this mixed-profile volume. Lead time of 10 business days for the in-stock profiles was accurate. Overall a dependable supply partner for project-based procurement; we will continue sourcing through this mill for regional orders.

Michael Johnson

United States

verified purchases

2025-04-02

Excellent ASTM A500 Grade C Triangular Tubes for Truss Application
Ordered 14 tons of triangular special profile steel tubes to ASTM A500 Grade C, 5mm wall thickness, 150mm side dimension, for a long-span truss system on an industrial warehouse in Ohio. Yield strength on the mill certs averaged 345 MPa against the 317 MPa minimum for Grade C—good margin. Compared quotes from three domestic service centers and two overseas mills; this supplier's mill-direct pricing was 13% lower while offering full 3.1 certification, which the domestic quotes did not include at that price point. Profiles arrived with painted finish as specified, coverage was even with no holidays detected on random inspection. Cut-to-length tolerance was within +0/−4mm on 9,000mm pieces. Delivery to West Coast port was 27 days from order confirmation. Our structural engineer confirmed the triangular geometry reduced chord member weight by approximately 18% versus equivalent rectangular HSS—exactly the efficiency gain we needed for this span.

William Taylor

Australia

verified purchases

2025-04-21

Premium Corten A Oval Tubes for Marine Walkway Structure
Procured 9 tons of semi-oval special profile steel tubes in Corten A (EN 10025-5:2004), 4mm wall thickness, 200mm × 80mm outer dimension, for a coastal walkway structure in Queensland requiring atmospheric corrosion resistance without paint maintenance. Material certificates confirmed copper, chromium, and nickel content consistent with weathering steel grade requirements. Surface finish was black mill scale as specified—appropriate for Corten applications where the patina layer needs to develop naturally. Dimensional inspection on arrival showed all profiles within the stated ±0.15mm tolerance on both axes. The team accepted our DWG files, confirmed feasibility within 24 hours, and delivered trial samples in 18 days before full production. Full batch dispatched in 28 days. This was our first order with this mill; based on material quality and technical responsiveness, we have already submitted drawings for a second project.

Ahmed Al-Hassan

UAE

verified purchases

2025-05-08

Good Value Flat-Oval Profile Tubes for Structural Canopy
Ordered 8 tons of flat-oval special profile steel tubes, Q235B grade, 2mm wall thickness, 150mm × 40mm profile, for a canopy framework at a commercial development in Dubai. Pricing was competitive—roughly 9% below the quote we received from a local stockist for comparable certified material. EN 10204 3.1 certificates were provided and chemical composition was within spec. Dispatch took 12 business days rather than the 7–10 days indicated, which created a minor scheduling adjustment on-site, though the supplier communicated the delay proactively and we were able to manage. Dimensional accuracy and weld seam quality were both good. Overall satisfied with the material quality and cost; would order again with slightly more lead time buffer built into the project schedule.

Carlos Silva

Brazil

verified purchases

2025-05-30

Superior Hexagonal Profile Tubes for Machinery Frames
Placed a 22-ton order of hexagonal special profile steel tubes, Q345B grade, wall thickness 6mm, across-flats dimension 100mm, cut to 6,000mm lengths for structural frames on agricultural processing machinery. Yield strength documented at 362 MPa on the 3.1 certificates—well above the 345 MPa minimum. Black finish with oiled coating arrived without surface rust despite a 28-day ocean transit. All lengths were cut-to-length within +0/−3mm, which allowed direct assembly without trimming. The engineering team reviewed our STEP files and flagged a corner radius adjustment that improved die life and reduced per-unit cost by approximately 7%—that kind of proactive input is uncommon. Delivery from order confirmation to port dispatch was 32 days. MOQ of 10 tons for new tooling was reasonable given the die development involved.

Hans Mueller

Germany

verified purchases

2025-06-21

Outstanding Elliptical Profile Tubes for Architectural Facade
Sourced 18 tons of elliptical special profile steel tubes in S235JRH grade, 2.5mm wall thickness, 120mm × 60mm outer dimension, for exposed structural columns on a commercial building facade in Munich. Submitted DXF drawings and received a feasibility report with wall thickness recommendations within 48 hours—engineering support was genuinely useful, not just a formality. Trial samples arrived in 14 days and matched our CAD geometry exactly. Full production batch followed within 30 days of design approval, well within the 25–35 day lead time stated. Galvanized finish per ASTM A123 was uniform with no flux inclusions. Compared quotations from four European distributors before placing this order; mill-direct pricing came in 11% lower for equivalent certified material. Will be specifying these tubes on our next two facade projects.

James Wilson

United Kingdom

verified purchases

2025-07-06

Excellent D-Shaped Tubes for Conveyor Rail System
Ordered 12 tons of D-shaped special profile steel tubes, 3mm wall thickness, S355J2H grade, outer dimension 80mm, for our automated conveyor rail project in a logistics facility. EN 10204 Type 3.1 mill test certificates were included with every bundle—chemical composition and yield strength both confirmed at 380 MPa, fully compliant with EN 10219-1:2006. Surface finish was clean oiled with no pitting or seam irregularities. Dimensional tolerance held within ±0.12mm across the entire batch, tighter than the quoted ±0.15mm. Shipment dispatched in 9 business days, one day ahead of the stated 10-day window. We eliminated all secondary profiling operations on-site, saving roughly 3 days of fabrication time. Third consecutive order with this supplier—consistency has been very reliable.