Description
EN 10210 S355 rectangular steel tube supplier — 2,800+ specifications covering wall thickness up to 40mm across three dedicated production lines.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | S355 Rectangular Steel Tube |
| Product Type | Welded Rectangular Steel Tube (RHS) |
| Steel Grade | S235JR, S275JR, S355JR, S355J2, Gr.B, STK400, Q235B, Q345B |
| Standard | EN 10210, EN 10219, ASTM A500, ASTM A53, GB/T 3091, JIS G3466 |
| Section Shape | Rectangular |
| Size Range | 15mm×20mm – 700mm×800mm |
| Wall Thickness | 1 – 30 mm |
| Length | 5.8m / 6m / 11.8m / 12m / Random Length |
| Technique | ERW (Welded) |
| Surface Treatment | Black Painted / Galvanized / Varnish / Bare |
| Tolerance | ±1% |
| Ends | Plain |
| Application | Construction structures / Building frames / Curtain walls / Support tubes / Steel structures |
| MOQ | 10 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Commercial Construction | Building frames, column sections, roof truss systems for warehouses and industrial parks |
| Architectural Facade | Curtain wall steel framing, glass facade support structures, decorative exterior columns |
| Infrastructure | Bridge support tubes, highway gantry structures, sound barrier frameworks |
| Steel Fabrication | Beam-to-column connections, base plates, embedded anchor assemblies |
| Machinery & Equipment | Conveyor support frames, crane boom sections, equipment base structures |
Where EN 10219 Certification Decides Customs Clearance for an EN 10210 S355 rectangular steel tube supplier Order
A missing or outdated CE reference on the mill test certificate can hold a full container at Hamburg or Rotterdam for weeks.
I have seen shipments delayed at EU ports because the EN standard number printed on the certificate was one revision behind what customs officers expected. The problem is not the steel itself — the material passes every mechanical test — but the paperwork does not match the current regulatory framework. For an EN 10210 S355 rectangular steel tube supplier shipping to regulated markets, the certificate must reference the active version of EN 10219-1 and EN 10219-2, and the CE marking must align with the Construction Products Regulation. [NEED_CITE: EN 10219 cold-formed hollow section requirements] Buyers who do not verify the standard revision before signing the purchase order often discover the gap only when the container reaches the destination port.
Matching Wall Thickness and Dimensional Tolerance to Structural Frame Requirements
An EN 10210 S355 rectangular steel tube supplier covering 15×20mm through 700×800mm with wall thickness from 1mm to 30mm can serve both light-gauge curtain wall framing and heavy-load column applications from a single order. The ±1% dimensional tolerance ensures that fabrication shops receive consistent outer dimensions for welding and bolting connections, reducing on-site rework. For projects combining multiple steel grades — such as S235JR for secondary bracing and S355J2 for primary moment frames — consolidated sourcing from one EN 10210 S355 rectangular steel tube supplier simplifies logistics and documentation.
Engineering Compliance Across Load-Bearing, Corrosion, and Certification Dimensions
Structural designers working to EN 1993 or equivalent codes require documented proof that the hollow sections meet the dimensional and mechanical properties declared in EN 10219-2. [NEED_CITE: EN 10219 dimensional tolerance requirements for structural hollow sections] The choice between bare, black painted, or hot-dip galvanized surface treatment depends on the exposure environment — indoor framed structures may ship bare, while outdoor infrastructure in coastal or industrial zones typically requires galvanizing. Steel grade selection between S235JR, S355JR, and S355J2 directly affects the load-bearing capacity and impact toughness at low temperatures, with S355J2 specified for sub-zero conditions. CE certification under EN 10210 and EN 10219 is mandatory for EU customs clearance, while ASTM A500 Gr.B/C documentation is required for North American projects. [NEED_CITE: steel grade equivalence between EN and ASTM standards]
Understanding ERW Welding, Steel Grade Hierarchy, and Surface Protection Trade-Offs
The ERW (Electric Resistance Welding) process forms the rectangular section by cold-rolling steel strip and welding the longitudinal seam under high-frequency current, producing a continuous weld with minimal heat-affected zone. This method suits structural hollow sections where the weld seam does not experience direct internal pressure, offering cost efficiency over seamless alternatives for rectangular and square profiles. Steel grades follow a clear hierarchy: S235JR provides baseline yield strength for non-critical framing, S275JR steps up for moderate loads, and S355JR/S355J2 delivers higher yield strength for primary structural members — with the J2 suffix indicating verified Charpy impact energy at −20°C. [NEED_CITE: S355J2 impact toughness requirements per EN 10219] Surface treatment selection balances cost against corrosion resistance: bare tubes suit indoor or temporarily protected environments, black painted offers short-term rust prevention during transit and storage, while hot-dip galvanizing provides long-term protection for exposed applications. The ±1% tolerance on outer dimensions and wall thickness ensures that theoretical weight calculations align with actual delivered weight, reducing disputes over invoicing methodology.
The Hidden Cost of Accepting Unverified Mill Test Certificates and Out-of-Tolerance Sections
Purchasing an EN 10210 S355 rectangular steel tube supplier product without independent verification of the mill test certificate risks three categories of hidden cost. First, chemical composition that does not match the declared steel grade can fail third-party inspection at destination, triggering re-testing fees or outright rejection. Second, wall thickness below the declared nominal value — even within permissible negative tolerance — reduces the section modulus and may not satisfy the structural engineer’s load calculations, forcing redesign or reinforcement. Third, missing or incorrect CE marking under EN 10210/EN 10219 leads to customs holds, demurrage charges, and project delays that far exceed the original material cost saving. [NEED_CITE: consequences of non-compliant structural steel imports in EU markets]
Why Project Procurement Teams Source from Xin Jiyuan
Our factory operates three dedicated production lines producing over 2,800 specifications of rectangular, square, and round hollow sections, with wall thickness reaching 40mm — eliminating the need to split orders across multiple mills. We hold 41 invention patents including China’s original sharp-corner rectangular tube technology, which delivers true 90-degree internal corners for architectural facade applications where standard rounded-corner tubes leave visible gaps at connections. Every shipment is accompanied by a mill test certificate generated from our in-house physical and chemical laboratory, and I personally review each certificate against the purchase order before release. We maintain full CE certification under EN 10210 and EN 10219, ISO 9001:2015, Singapore FPC, and third-party verification through SGS and BV — documentation that has cleared customs in over 50 countries without delay. Custom non-standard dimensions, cutting to specific lengths, and professional container loading with anti-damage measures are standard practice, not premium add-ons.
Documentation & Compliance
- Mill test certificate documenting S355JR/S355J2 chemical composition and mechanical properties per EN 10219-1, issued per heat number
- CE certificate confirming compliance with EN 10210 and EN 10219 for construction products regulation conformity
- ISO 9001:2015 quality management system certificate covering the full production and inspection process
- SGS or BV third-party inspection report available upon request, covering dimensional verification and visual examination
- Material traceability linking each bundle to its heat number, steel grade, and production date
- Export documentation including packing list, bill of lading, and certificate of origin for customs clearance
Packaging, Loading & Delivery
- ERW welded S355 rectangular tubes bundled with steel strips and edge protectors, sized to match the 5.8m/6m/11.8m/12m length for optimal container utilization
- Galvanized rectangular hollow sections packed with separated layers and moisture barriers to preserve the zinc coating during ocean transit
- Custom-length cutting available to match project-specific requirements, reducing on-site waste and handling
- Heat number and steel grade marked on each tube end for traceability and site identification
- Professional container loading with wooden chocks and steel wire lashing to prevent shifting and surface damage during transport
- FOB, CIF, and DDP shipping terms available, with door-to-door logistics coordination to destination port or project site
Submitting an Inquiry for Accurate Quotation and Certification Confirmation
Provide the rectangular tube dimensions (outer width × height × wall thickness), steel grade (S235JR/S355JR/S355J2 or equivalent), surface treatment preference, total quantity, and destination port. We respond within 12 hours with a detailed quotation including unit price, lead time, and shipping terms, along with sample mill test certificates and CE documentation for your engineering team’s review. For non-standard dimensions or custom length requirements, we confirm production feasibility and tooling lead time before contract signing.
Frequently Asked Questions
Q: Can S355JR per EN 10219 be substituted with Q345B per GB/T 3091 or ASTM A500 Gr.C?
A: These grades share similar yield strength ranges and are often considered equivalent in international procurement, but the chemical composition and testing methods differ slightly. We provide cross-reference documentation and can supply mill test certificates showing compliance with multiple standards upon request.
Q: What is the minimum order quantity for custom non-standard rectangular tube dimensions?
A: The standard MOQ is 10 tons per size. For project-specific dimensions outside our 2,800+ specification range, we evaluate production feasibility based on order volume and tooling requirements.
Q: How do you ensure the CE certificate matches the current EN 10219 revision for EU customs clearance?
A: Our CE certification under EN 10210 and EN 10219 is maintained through Lloyd’s Register, and we update the standard references whenever revisions are published. Each mill test certificate clearly states the applicable standard version.
Q: What surface treatment options are available for S355 rectangular tubes in corrosive environments?
A: We offer hot-dip galvanizing for long-term corrosion protection, black painted coating for short-term prevention, and bare delivery for indoor or temporarily protected applications. The choice depends on the exposure environment and project specification.
Q: Do you charge by theoretical weight or actual weight?
A: We offer both invoicing methods. Theoretical weight is calculated based on nominal dimensions and standard density, while actual weight is determined by scale measurement at the factory. The ±1% tolerance applies to both dimensions and weight.
Request Your EN 10210 S355 Rectangular Steel Tube Quotation Today
Send your specifications, steel grade, quantity, and destination port to receive a detailed quotation with mill test certificate samples and CE documentation within 12 hours.
Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.sdxjypipe.com
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxjypipe.com
Address: No.11889, Jingshi West Road, Lulian Group, Jinan City, Shandong Province, China
