Description
Factory-Direct EN10219 S355JR Square Rectangular Steel Tube 0.5-50mm Wall Factory Direct — Every S355JR EN10219 square and rectangular steel tube rolls off our own ERW line, inspected in-house before it reaches your site.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | S355JR / S355J2H / S355J0H EN10219/EN10210 Square & Rectangular Steel Tube |
| Product Type | Square & Rectangular Steel Tube (SHS / RHS) |
| Steel Grade | S235JR, S275JR, S355JR, S355J0H, S355J2H, ASTM A53 GR.B, Q460, A36, SS400 |
| Standard | EN10219, EN10210, ASTM A53 |
| Section Shape | Square / Rectangular |
| Size Range | 15×15 mm – 1000×1000 mm (Square) / 20×30 mm – 600×800 mm (Rectangular) |
| Wall Thickness | 0.5 mm – 50 mm |
| Length | 5.8 m – 14 m (or custom) |
| Technique | ERW (Electric Resistance Welded) / Hot Rolled |
| Surface Treatment | Galvanized / Black (Bare) / Oiled / Painted / 3PE Coating |
| Ends | Plain / Beveled / Threaded / Flanged |
| Tolerance | ±1% |
| Application | Steel structures / Urban & civil construction / Machinery structure / Scaffolding / Greenhouse / Furniture / Low-pressure fluid transport / Building materials |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| EPC Contractors & Steel Structure Fabricators | Industrial building frames, bridge support columns, warehouse portal frames |
| Construction Companies | Scaffolding uprights, building material tubes, civil infrastructure handrails |
| Machinery Manufacturers | Equipment frames, conveyor system supports, agricultural machinery chassis |
Where EN10219 Certification Decides Customs Clearance at EU Ports
A missing or mismatched CE mark under EN 10219 can hold an entire container at Rotterdam for weeks.
I have watched shipments get flagged because the mill test certificate listed S235JR while the commercial invoice declared S355JR — a paperwork gap that cost the client demurrage fees and a re-inspection bill. When you order an EN10219 S355JR square and rectangular steel tube 0.5-50mm wall factory direct from us, the chemical composition and mechanical test results on the EN 10204 3.1 certificate match the heat number stamped on every tube. Our in-house lab runs tensile, flattening, and impact tests per EN10219 before the bundle leaves the warehouse, so what arrives at your port is what your engineer specified. [NEED_CITE: EN 10219 cold-formed structural hollow sections certification requirements]
How S355JR Wall Thickness Meets Load-Bearing Demands in Structural Frames
When an EPC contractor specifies S355JR for a warehouse portal frame, the wall thickness directly governs the section modulus and buckling resistance of each column. Our ER10219 S355JR square and rectangular steel tube 0.5-50mm wall factory direct range covers everything from light-gauge 0.5 mm greenhouse purlins to heavy-duty 50 mm thick bridge bearing stiffeners — all within ±1% dimensional tolerance. The proprietary sharp-corner rectangular tube technology we developed ensures that corner radii stay tight enough for gusset plates to sit flush, eliminating the gap-filling shims that slow down bolted connections on site.
Structural Compliance: EN 1993, Corrosion Protection, and Site Fabrication
Design to EN 1993-1-1 requires verified steel grade traceability; our S355JR tubes ship with heat-number-linked mill certificates that satisfy Eurocode material documentation clauses. For corrosive environments — coastal industrial plants, wastewater treatment structures — hot-dip galvanized finish provides long-term protection without field painting, while black or oiled finish suits indoor or painted applications where surface adhesion matters. [NEED_CITE: EN 1993-1-1 steel structure design material requirements] Beveled or plain ends are available depending on whether the tubes will be butt-welded or slip-connected on site, and custom cut-to-length service reduces secondary cutting waste at the fabrication yard.
Understanding S-Series Steel Grades and ERW Welding Quality
The S-series designation (S235JR, S275JR, S355JR) indicates minimum yield strength in MPa at room temperature, with the JR suffix denoting impact test energy at 20 °C. Moving from S235JR to S355JR roughly doubles the yield point, allowing thinner walls for the same load — which is why S355JR dominates structural steel procurement across Europe and the Middle East. Our ERW process uses high-frequency electric current to fuse the seam, followed by hydrostatic testing and ultrasonic weld inspection; the result is a continuous weld line with mechanical properties matching the parent metal. [NEED_CITE: ERW welded steel tube quality standards and testing methods] For outdoor exposure, hot-dip galvanizing adds a zinc layer that sacrifices itself before the base steel corrodes, while 3PE coating combines epoxy adhesion with polyethylene moisture barrier for buried or submerged service.
The Hidden Cost of Negative Tolerance Abuse on Structural Orders
When a supplier pushes wall thickness to the lower limit of negative tolerance, the theoretical weight drops — and so does the actual load-bearing capacity. A 100×100×5 mm S355JR SHS that arrives at 4.6 mm actual wall will fail ultrasonic thickness verification during third-party inspection, forcing the entire batch to be rejected or downgraded. [NEED_CITE: EN 10219 dimensional tolerance requirements for cold-formed hollow sections] Certification gaps compound the problem: without a valid CE mark under EN 10219, EU customs can detain the shipment; without matching heat numbers on the mill test certificate, the engineer cannot sign off on structural compliance. The real cost is not the per-ton price difference — it is the project delay, the re-procurement lead time, and the reputational damage with the end client.
Why Global EPC Contractors Source EN10219 Tubes from Xin Jiyuan
We operate three dedicated ERW production lines with in-house physical and chemical laboratories, meaning every S355JR tube is tested before it ships — not sampled after the fact. Our 41 patented technologies include the sharp-corner rectangular tube process that fills a gap in the global market for tight-radius structural connections. With 2,800+ specifications in stock and custom non-standard sizes available, you consolidate pipes, plates, and sections into a single purchase order instead of coordinating five different suppliers. CE certification under EN 10210/EN 10219, ISO 9001:2015 registration, and SGS/BV third-party inspection capability ensure that your documentation package clears EU, North American, and Middle Eastern customs without delay. Professional loading plans optimize container weight for heavy-wall tubes, and our export team handles FOB, CIF, and DDP logistics to 50+ countries with real-time tracking.
Documentation & Compliance
- Mill test certificate documenting S355JR chemical composition, yield strength, and tensile properties per EN10219, linked to heat number
- CE certificate of conformity per EN 10210 and EN 10219 for structural hollow sections exported to EU member states
- ISO 9001:2015 quality management system certificate covering ERW welding, dimensional inspection, and final testing
- SGS or BV third-party inspection report available upon request for pre-shipment verification of wall thickness and surface quality
- Material traceability report mapping each bundle to its heat number, chemical analysis, and mechanical test results
- Full customs documentation package: commercial invoice, packing list, bill of lading, and certificate of origin
Packaging, Loading & Delivery
- S355JR square and rectangular tubes bundled with high-tensile steel strips and edge protectors to prevent zinc coating damage during ocean transit
- Galvanized finish tubes wrapped in waterproof paper with desiccant packets; black or oiled tubes coated with anti-rust oil before bundling
- Container loading plans optimized for 5.8 m and 12 m lengths to maximize payload per 20ft or 40ft container, reducing per-ton freight cost
- Custom cut-to-length service available for 14 m tubes, with kerf-loss calculation provided before order confirmation
- Heat number and steel grade stenciled on each tube end for on-site traceability and inspection verification
- FOB Jinan/Qingdao, CIF destination port, or DDP door-to-door delivery with real-time container tracking
Ready to Lock In Your EN10219 S355JR Tube Order
Submit your specification sheet — section size, wall thickness, steel grade, surface treatment, quantity, and destination port — and receive a detailed quotation within 12 hours, including unit price, mill test certificate confirmation, and estimated production lead time. For non-standard dimensions or sharp-corner rectangular tubes, our engineering team will provide a custom drawing and MOQ confirmation before you commit.
Request Your EN10219 S355JR Square Rectangular Steel Tube Quotation Now
Send your requirements to admin@sdxjysteel.com or reach us on WhatsApp at +86 188 5315 7756 to start your procurement process.
Frequently Asked Questions
Q: How does EN10219 S355JR compare to ASTM A500 Grade B for structural applications?
A: S355JR per EN10219 and ASTM A500 Grade B are both widely used structural steel grades, but they follow different testing and certification frameworks. S355JR requires CE marking for EU projects, while A500 Grade B is standard for North American construction. We supply both and can provide cross-reference documentation for projects requiring dual-standard compliance.
Q: Can you produce non-standard dimensions outside your catalog range?
A: Yes. Our 2,800+ specification range covers standard sizes, but we also manufacture custom non-standard dimensions including sharp-corner rectangular tubes with tight radius corners. MOQ for custom sizes depends on the profile complexity and tonnage; contact us with your drawing for a specific quote.
Q: What is the difference between galvanized and black finish for outdoor structural use?
A: Hot-dip galvanized finish provides long-term corrosion protection through a zinc sacrificial layer, ideal for outdoor exposure, coastal environments, or structures where field painting is impractical. Black (bare) or oiled finish is suitable for indoor applications or structures that will be painted on site, where surface adhesion and coating compatibility are priorities.
Q: What certifications do you provide for EU customs clearance?
A: We provide CE certification per EN 10210 and EN 10219, ISO 9001:2015 quality certificate, mill test certificates per EN 10204 3.1, and third-party inspection reports from SGS or BV. This documentation package satisfies EU construction product regulation requirements and clears customs at major European ports.
Q: How do you optimize container loading for heavy-wall steel tubes?
A: Our logistics team calculates the optimal loading plan based on tube dimensions, wall thickness, and container type (20ft or 40ft). For heavy-wall tubes like 50 mm thickness, we maximize payload while staying within road weight limits at destination. We provide loading diagrams before shipment so you can verify the plan.
Get Your EN10219 S355JR Square Rectangular Steel Tube Quote Today
Email your specifications to admin@sdxjysteel.com or WhatsApp +86 188 5315 7756 to receive a detailed quotation with mill test certificate confirmation within 12 hours.
