Description
Factory-Direct EN 10210 S355 RHS — Every S355J2H rectangular hollow section we ship carries an original mill test certificate traceable to heat number, with no trading markup in between.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | EN 10210 S355 Rectangular Steel Tube |
| Product Type | Rectangular Hollow Section (RHS) |
| Steel Grade | S235JR, S275JR, S355J2H, S355J0H, Gr.B, STK400 |
| Standard | EN 10210, 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 | ERW (Welded) |
| Surface Treatment | Black Painted / Galvanized / Varnish / Bare |
| Tolerance | ±1% |
| Ends | Plain |
| Application | Steel structures, Construction frames, Curtain wall, Support tubes, Building structures |
| MOQ | 10 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Steel Structure Fabrication | Column frames, roof trusses, bracing members for industrial warehouses |
| Commercial Construction | Curtain wall support grids, facade framing, mezzanine floor beams |
| Infrastructure & Civil Engineering | Bridge handrail posts, platform walkways, sound-barrier supports |
| Heavy Equipment & Machinery | Crane boom extensions, conveyor support frames, equipment base structures |
What Wall-Thickness Tolerance Costs on a Structural Frame Order
A ±1% tolerance on a 10mm-wall S355J2H RHS means the difference between passing structural inspection and scrapping an entire batch.
Structural engineers calculate load-bearing capacity based on nominal wall thickness. When actual wall thickness drifts beyond tolerance — a common issue with mills practicing hidden negative tolerance — the moment of inertia drops, deflection limits are breached, and the entire frame fails third-party dimensional verification. On a recent project supplying S355 rectangular steel tube EN 10210 RHS to a West African warehouse build, the client’s inspector rejected two bundles because wall deviation exceeded ±1% at the weld seam. We now run ultrasonic thickness checks at four points per cross-section before any EN 10210 S355 rectangular steel tube leaves the yard. [NEED_CITE: EN 10210 hot-finished structural hollow section dimensional tolerance requirements]
Matching S355 RHS to Structural Load and Connection Requirements
The EN 10210 S355 rectangular steel tube in S355J2H grade delivers higher yield strength than S275JR, making it the default choice for primary load-bearing columns and long-span beams where deflection control matters. For curtain wall secondary framing, S235JR or S275JR often suffices and reduces material cost. The ERW weld seam on our RHS runs full-length with ultrasonic integrity verification, ensuring the tube performs uniformly under bending and torsion at connection nodes. When projects specify both EN and ASTM standards on the same drawing, we cross-reference S355J2H to ASTM A500 Gr.B and supply the matching mill test certificate — eliminating grade-substitution disputes at site.
Engineering Compliance: From EN 1993 Design Codes to Customs Clearance
European structural projects require EN 10210 compliance with CE marking for the EN 10210 S355 rectangular steel tube to pass customs and site acceptance. The S355J2H grade carries Charpy impact testing at -20°C, a mandatory requirement for structures in cold climates under EN 1993. For North American projects, the same tube can be certified to ASTM A500 Gr.B with matching chemistry and mechanical reports. Surface treatment selection also ties to compliance: hot-dip galvanized RHS is specified for coastal or industrial-corrosion environments per ISO 12944, while black painted or bare finishes suit indoor structural frames where fire-rated intumescent coating will be applied on site. [NEED_CITE: CE marking requirements for structural steel hollow sections under EN 10210]
Understanding ERW Welding, Steel Grade Selection, and Surface Protection
The ERW (Electric Resistance Welding) process forms the rectangular profile from hot-rolled coil and welds the seam under pressure without filler metal. This produces a consistent weld zone with mechanical properties matching the parent metal — critical when the EN 10210 S355 rectangular steel tube is bent or drilled at connection points. Steel grade progression from S235JR through S275JR to S355J2H reflects increasing yield strength: each step allows thinner walls for the same load, reducing dead weight on the structure. The J0 and J2 suffixes on S355 denote impact test temperatures of 0°C and -20°C respectively — essential for projects in Nordic, Canadian, or high-altitude regions. For surface protection, hot-dip galvanizing adds a zinc layer of 50–85μm for long-term corrosion resistance, while black paint or varnish serves as a temporary protective coat during transit and fabrication. [NEED_CITE: ERW weld seam integrity in structural hollow sections per EN 10210]
The Hidden Cost of Unverified Mill Certificates and Negative Tolerance
Ordering the EN 10210 S355 rectangular steel tube without verified chemistry and mechanical reports risks three failure modes: customs rejection due to missing CE documentation, structural inspection failure from out-of-tolerance wall thickness, and weld cracking from incorrect carbon equivalent in untraceable heats. A forged or generic mill test certificate cannot pass SGS or BV third-party verification — and many project owners now mandate heat-number-level traceability before releasing payment. The cost of re-milling, re-shipping, and project delay far exceeds the price difference between a verified supplier and an unverified one. [NEED_CITE: steel grade equivalence mapping between EN 10210 and ASTM A500 standards]
Why Structural Steel Buyers Source EN 10210 S355 RHS Through Us
We operate from our own stockyard in Jinan with full-size S355J2H, S275JR, and S235JR rectangular hollow sections in lengths from 5.8m to 12m — no minimum coil or mill-run constraints for standard sizes. Every EN 10210 S355 rectangular steel tube ships with an original mill test certificate showing heat number, chemical composition, and mechanical properties, verifiable against the mill’s production record. Our in-house dimensional lab checks wall thickness, flatness, and corner radius on every bundle before loading. For projects requiring mixed sizes or cut-to-length, we offer plasma cutting and custom blanking from 10 tons MOQ. Third-party inspection by SGS or BV is arranged on-site before container sealing. Professional heavy-cargo loading teams handle flatbed and open-top container stowage, ensuring no overweight penalties or port rejection.
Documentation & Compliance
- Mill test certificate documenting S355J2H chemical composition, yield strength, and Charpy impact values at -20°C per EN 10210
- CE certificate confirming EN 10210 compliance for structural hollow sections entering European Union markets
- ISO 9001:2015 quality management certificate covering the full production and inspection process
- SGS or BV third-party inspection report verifying dimensional tolerance, surface coating thickness, and weld seam integrity
- Full material traceability by heat number linking each EN 10210 S355 rectangular steel tube to its original coil and production batch
- Complete customs documentation set: packing list, bill of lading, certificate of origin, and commercial invoice
Packaging, Loading & Delivery
- S355 RHS bundled with galvanized steel strips at both ends and mid-span, sized to match the 5.8m / 6m / 11.8m / 12m length for secure container stowage
- Hot-dip galvanized rectangular tubes wrapped with waterproof cloth and edge protectors to preserve zinc coating during ocean transit
- Open-top container or flatbed loading optimized for 700×800mm large-section RHS, with weight distribution calculated to avoid port overweight penalties
- Custom cut-to-length service available for non-standard dimensions, with each piece marked by heat number and steel grade
- Shipping terms FOB / CIF / DDP with full export documentation and real-time tracking until port of discharge
Getting Your EN 10210 S355 RHS Quote Ready for Project Approval
Send us your drawing schedule or size list with steel grade, wall thickness, length, quantity, and destination port. We return a detailed quotation with material cost, processing fees, and shipping terms within 12 hours — along with a sample mill test certificate for your engineer’s review. For non-standard sections or mixed-grade orders, we provide a cut-to-size proposal with dimensional confirmation before production.
Request Your EN 10210 S355 RHS Quotation with Mill Test Certificate
Submit your specification list and destination port to receive pricing, original MTC samples, and third-party inspection options.
Company: Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.xjyplate.com
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@xjyplate.com
Frequently Asked Questions
Q: How does S355J2H compare to ASTM A500 Gr.B and JIS STK400 for the same structural application?
A: S355J2H under EN 10210, ASTM A500 Gr.B, and JIS STK400 all serve structural rectangular hollow sections, but differ in chemistry limits and impact testing requirements. We supply cross-reference mill test certificates showing equivalence across these standards, so your engineer can approve material substitution without re-specification.
Q: Can I request SGS or BV third-party inspection before shipment of the EN 10210 S355 rectangular steel tube?
A: Yes. We arrange SGS or BV inspection at our stockyard before container loading. The inspector verifies wall thickness tolerance, surface coating, dimensional accuracy, and reviews the original mill test certificate against the physical heat number markings on each bundle.
Q: What is the minimum order quantity for custom cut-to-size S355 rectangular steel tube?
A: The MOQ is 10 tons for standard sizes and stock grades. For custom cut-to-length or non-standard dimensions outside the 15×20mm to 700×800mm range, we confirm feasibility and lead time after reviewing your drawing schedule.
Q: Which surface treatment should I choose for coastal or high-humidity environments?
A: Hot-dip galvanized EN 10210 S355 rectangular steel tube provides long-term corrosion protection for coastal and outdoor applications. For indoor structures where fire-rated intumescent paint will be applied on site, black painted or bare finish is the standard choice.
Q: How do you ensure wall thickness tolerance stays within ±1% on every bundle?
A: We run ultrasonic thickness measurement at four points per cross-section — two at the flat face and two at the corner — on every bundle before packaging. Any tube outside ±1% tolerance is rejected and replaced. The dimensional report is included with the shipment documentation.
