Description
Factory-direct EN 10210 S355 rectangular steel tube supplier — every shipment backed by original mill test certificates and available for SGS/BV third-party inspection before loading.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | EN 10210 S355 Rectangular Steel Tube |
| Product Type | Rectangular Hollow Section (RHS) |
| Steel Grade | S235, S275, S355, STK400, Gr.B |
| Standard | EN 10210, EN 10219, ASTM A500, ASTM A53, GB/T 3091 |
| Section Shape | Rectangular |
| Size Range | 15mm × 20mm – 700mm × 800mm |
| Wall Thickness | 1 – 30 mm |
| Length | 5.8m / 6m / 11.8m / 12m / Random Length |
| Technique | Welded (ERW) / Seamless |
| Surface Treatment | Black Painted / Galvanized / Varnish / Bare |
| Tolerance | ±1% |
| Ends | Plain |
| Processing Service | Bending, Cutting |
| Application | Construction structures, building frames, curtain wall structures, support tubes, machinery structures |
| MOQ | 10 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Construction & Infrastructure | Building frames, curtain wall support structures, steel structure projects under Belt & Road initiatives |
| Industrial & Machinery | Equipment frames, support tubes, structural fabrication for OEM factories |
| Commercial Building | Scaffolding systems, architectural structural components, mezzanine floor supports |
| Agricultural & Storage | Warehouse racking systems, greenhouse structural frames, silo support columns |
What Wall-Thickness Tolerance Costs on a Structural Frame Order
Negative tolerance beyond standard limits triggers re-inspection fees, customs holds, and on-site rework.
Global buyers sourcing EN 10210 S355 rectangular steel tube frequently encounter inconsistent material properties and unclear steel grade traceability. Missing or incomplete CE and mill test certificates cause customs delays at EU ports, while fragmented sourcing across pipes, plates, and beams from different suppliers increases coordination costs and delivery risks [NEED_CITE: EN 10219 cold-formed hollow section requirements]. When wall thickness falls outside the ±1% tolerance band, structural engineers must recalculate load-bearing capacity — often resulting in rejected batches or costly supplementary reinforcement on-site.
How S355 Rectangular Hollow Sections Match Structural Engineering Demands
Rectangular hollow sections deliver superior torsional resistance and flat bearing surfaces compared to circular pipes, making them the preferred choice for moment-resisting frames and bolted connections in building structures. The S355 grade provides higher yield strength than S235 or S275, allowing engineers to reduce section sizes while maintaining load capacity — critical for curtain wall support systems where weight and sightlines matter. Our production lines cover the full range from 15mm × 20mm light-gauge sections to 700mm × 800mm heavy structural members, with both ERW welded and seamless options available depending on pressure requirements and project specifications.
Engineering Compliance and Certification Requirements for EU and Global Markets
Structural hollow sections supplied under EN 10210 must comply with CPR Regulation (EU) No 305/2011 for construction products, requiring CE marking and declared performance values for mechanical resistance, fire reaction, and durability [NEED_CITE: EN 10210 structural hollow sections CPR certification requirements]. For projects in North America, ASTM A500 Gr.B or Gr.C equivalence must be documented, while JIS G3466 STK400 applies to Japanese-specification infrastructure works. Surface treatment selection — hot-dip galvanized for coastal or high-humidity environments, black painted for interior dry conditions, or bare for sites with field-applied coating systems — directly affects long-term maintenance costs and corrosion protection performance.
Steel Grade Selection and Production Process Explained
The S-series steel grades (S235, S275, S355) follow European EN standards where the number indicates minimum yield strength in MPa — S355 delivers approximately 50% higher yield than S235, enabling thinner wall sections for equivalent load-bearing capacity. ERW welded production offers cost efficiency for standard structural applications with wall thickness up to 20mm, while seamless tubes provide uniform strength around the entire cross-section for heavy-load or high-pressure conditions. Surface treatment options include hot-dip galvanizing for zinc coating thickness of 45–85μm suitable for outdoor exposure, black painted finishes for temporary protection during transport, and varnish coating for indoor architectural applications requiring aesthetic finish. Wall thickness tolerance of ±1% ensures compliance with EN 10219 dimensional requirements, preventing the negative tolerance issues that cause theoretical weight calculations to diverge from actual delivered mass [NEED_CITE: steel grade equivalence between EN and ASTM standards].
Hidden Costs of Incorrect Steel Grade or Missing Certification
Specifying S235 when structural calculations require S355 creates safety margins below design intent — a compliance failure that structural inspectors will flag during project handover. Missing CE documentation or incomplete mill test certificates cause customs holds at EU ports, with demurrage charges accumulating daily while importers scramble to obtain retroactive certification from overseas mills. Material traceability gaps — no heat number linkage between delivered tubes and test reports — force buyers to either reject entire shipments or accept unverified material that may fail under load testing [NEED_CITE: structural steel certification requirements for customs clearance].
Why Project Buyers Source EN 10210 S355 Rectangular Steel Tube From Xin Jiyuan
Our factory-direct pricing eliminates trading company markups, with volume discounts structured for long-term partners placing recurring orders above 100 tons annually. Every batch undergoes three-stage in-house inspection in our理化 laboratory before dispatch, with original mill test certificates documenting chemical composition and mechanical properties for each heat number. We maintain ready stock across 2,800+ specifications covering standard EN 10210 and ASTM A500 sizes, enabling urgent shipments within typical production lead times while custom non-standard dimensions follow 15–25 day production cycles. CE certification under EN 10210/EN 10219 and ISO 9001:2015 quality management ensure EU customs compliance, with SGS/BV third-party inspection available on request for pre-shipment verification. Professional export teams optimize container loading plans for heavy RHS cargo, reducing freight costs through strategic nesting of rectangular sections and proper weight distribution across 20ft and 40ft containers.
Documentation & Compliance
- Mill test certificate documenting S355 chemical composition and yield strength per EN 10210, with heat number traceability for every rectangular tube in the shipment
- CE certificate covering EN 10210 and EN 10219 structural hollow sections, required for construction product compliance in EU member states
- ISO 9001:2015 quality management system certificate demonstrating controlled production processes and inspection protocols
- SGS or BV third-party inspection report available on request, covering dimensional verification, surface treatment thickness measurement, and witness testing
- Material traceability documentation linking each bundle to specific heat numbers, production dates, and test certificate references
- Complete customs document package including packing list, bill of lading, certificate of origin, and commercial invoice formatted for destination country requirements
Packaging, Loading & Delivery
- S355 rectangular tubes bundled with steel strips and edge protectors to preserve galvanized coating and prevent surface damage during ocean transit
- Surface treatment protection through plastic wrapping for galvanized sections or anti-rust oil application for bare and black painted tubes
- Container loading optimization using nested stacking patterns for 15mm × 20mm through 400mm × 400mm sections, maximizing payload within 27-ton road weight limits
- Length customization to 5.8m or 11.8m for standard 20ft and 40ft container configurations, minimizing cutting waste at project sites
- Heat number and steel grade marking stenciled on each bundle, with color-coded banding for quick identification of S235, S275, and S355 grades during unloading
- FOB, CIF, and DDP shipping terms available with professional export documentation handling for customs clearance at destination ports
How to Request Quotation and Technical Documentation for Your Project
Submit your specification requirements including section dimensions, wall thickness, steel grade, total quantity, and destination port to receive competitive bulk pricing with volume discounts and mill test certificate confirmation. Our technical team responds within 12 hours with detailed quotation covering production lead times, surface treatment options, and container loading plans optimized for your order size. Non-standard dimensions and custom length requirements receive engineering review for feasibility and pricing within typical production lead times.
Start Your EN 10210 S355 Rectangular Steel Tube Inquiry Today
Send your project specifications via email or WhatsApp to receive factory-direct pricing, complete mill test certificate samples, and container loading optimization plans for your next structural steel procurement.
Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.sdxinjiyuan.com
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxinjiyuan.com
