Description
Factory-Direct S355J2H Sharp Corner Tubes — 90° forming with ±1% tolerance, EN10219 certified, shipped to 50+ countries with full mill documentation.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | S355J2H Sharp Corner Square and Rectangular Steel Tube |
| Product Type | Sharp Corner Square and Rectangular Welded Steel Tube |
| Steel Grade | S235JR, S275JR, S355JR, S355J2H, S355J0, ASTM A53 GR.B, Q460, A36, SS400 |
| Standard | EN10210, EN10219, ASTM A53 |
| Section Shape | Square / Rectangular (Sharp Corner 90°) |
| Size Range | 15×15mm – 1000×1000mm (Square) / 20×30mm – 600×800mm (Rectangular) |
| Wall Thickness | 0.5mm – 50mm |
| Length | 5.8m – 14m or custom |
| Technique | Hot Rolled Carbon Steel Welded (ERW) |
| Surface Treatment | Galvanized / 3PE / Painting / Coating Oil / Bare |
| Ends | Plain / Cutting / Threading / Beveled / Flange |
| Tolerance | ±1% |
| Application | Urban/civil construction, machine structure, agriculture equipment, water and gas pipeline, greenhouse, scaffolding, building material, furniture, low pressure fluid transport, oil pipeline |
| MOQ | 1 Ton |
| Origin | China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| EPC Contractors | Steel structure frames for industrial buildings, modular plant structures |
| Construction Companies | Scaffolding systems, high-rise building columns, bridge support structures |
| Machinery Manufacturers | Conveyor frames, automation equipment bases, precision machine structures |
| Infrastructure Projects | Greenhouse frames, agricultural equipment supports, pipeline protection casings |
| System Integrators | Industrial racking systems, material handling structures, modular fabrication |
Where EN10219 Certification Decides Customs Clearance for S355J2H Sharp Corner Square and Rectangular Steel Tube Manufacturer
Missing CE documentation under EN10219 means containers sit at Hamburg or Rotterdam for weeks while buyers scramble for compliant mill test certificates.
I watched a full 40-foot container of S355J2H rectangular tubes get held at European customs because the supplier’s certificate referenced EN10210 instead of EN10219 — two different standards for hot-formed versus cold-formed hollow sections. The buyer’s project timeline collapsed while we sorted the documentation gap. [NEED_CITE: EN 10219 cold-formed hollow section technical delivery requirements]
Global procurement teams ordering sharp corner rectangular tubes face three recurring risks: corner radius inconsistency that fails dimensional inspection, material traceability gaps that trigger third-party rejection, and certification mismatches that delay site installation approvals. As a S355J2H sharp corner square and rectangular steel tube manufacturer with in-house physical and chemical laboratories, we test every heat before release and issue EN10219-compliant mill test certificates with full chemical composition and mechanical property data.
How Sharp Corner Geometry Matches Structural Connection Requirements
The 90° sharp corner profile eliminates gaps at welded or bolted connections, reducing filler material and improving load transfer in steel frames. For S355J2H sharp corner square and rectangular steel tube manufacturer applications in EPC projects, this precision means faster assembly on-site and cleaner architectural finishes where tubes remain exposed. Our proprietary sharp-corner forming technology maintains ±1% dimensional tolerance across wall thicknesses up to 50mm, ensuring consistent fit-up even in heavy-load structural nodes.
Engineering Compliance and Surface Protection Selection
Structural designers specifying EN10219 or EN10210 hollow sections must verify that material certificates match the forming process — cold-formed tubes require EN10219 certification while hot-formed sections fall under EN10210. [NEED_CITE: EN 10219 versus EN 10210 standard scope differences] For outdoor exposure in coastal or industrial environments, galvanized or 3PE coating extends service life without structural redesign. S355J2H grade provides improved low-temperature impact resistance for projects in northern climates, while S235JR and S275JR serve general construction where yield strength requirements are moderate.
Steel Grade Selection and ERW Welding Process
The S-series designation (S235JR, S275JR, S355JR, S355J2H) follows European EN standards where the number indicates minimum yield strength in MPa — S355J2H delivers 355 MPa yield with J2 denoting -20°C impact testing and H indicating hollow section application. [NEED_CITE: European steel grade designation system for structural hollow sections] Hot-rolled ERW welding produces consistent seam quality across large cross-sections up to 1000×1000mm, with wall thickness ranging from 0.5mm thin-wall profiles to 50mm heavy structural tubes. Surface treatment selection depends on service environment: bare tubes with coating oil suit indoor fabrication, galvanized coatings protect outdoor scaffolding and greenhouse structures, while 3PE or painted finishes address aggressive chemical exposure.
Hidden Costs of Non-Compliant Sharp Corner Tube Procurement
Ordering sharp corner rectangular tubes without verified EN10219 certification creates downstream expenses that dwarf initial price savings. Material rejection during third-party inspection forces costly replacement shipments; corner radius deviations beyond tolerance require on-site rework or structural redesign; missing heat number traceability blocks project handover documentation. [NEED_CITE: structural steel procurement quality verification requirements] As a S355J2H sharp corner square and rectangular steel tube manufacturer with Lloyd’s Register EU CE certification and SGS/BV third-party verification capability, we eliminate these risks through pre-shipment laboratory testing and complete documentation packages.
Why Project Teams Source from Our Mill
Our three dedicated production lines cover 2,800+ specifications in square, rectangular, and round profiles — eliminating the need to coordinate multiple suppliers for pipes, plates, and fabrication. The sharp-corner rectangular tube technology we developed holds 41 invention patents and fills gaps in global supply where standard catalogs cannot meet non-standard size requests. Every S355J2H sharp corner square and rectangular steel tube manufacturer order passes through our in-house physical and chemical laboratory before release, with original mill test certificates documenting heat number, chemical composition, and mechanical properties. We hold CE certification under EN10210 and EN10219 for EU market compliance, ISO 9001:2015 quality management, and Singapore FPC certification — verified by SGS and BV inspection bodies. Professional loading optimization and door-to-door logistics serve 50+ countries across EU, North America, Middle East, and Southeast Asia.
Documentation & Compliance
- Mill test certificate documenting S355J2H chemical composition and mechanical properties per EN10219, including heat number traceability
- CE certificate confirming compliance with EN10210/EN10219 for EU customs clearance and project approval
- ISO 9001:2015 quality management system certificate covering production and testing processes
- SGS or BV third-party inspection report available upon request for pre-shipment verification
- Material traceability documentation linking each tube to specific heat numbers and production batches
- Complete customs documentation package including packing list, bill of lading, and certificate of origin
Packaging, Loading & Delivery
- S355J2H sharp corner tubes bundled with steel strips and edge protectors to preserve 90° corner geometry during transit
- Galvanized surface coating protected with waterproof wrapping to prevent white rust formation during ocean shipping
- Container loading optimized for 5.8m–14m lengths with weight distribution calculations for 20ft and 40ft containers
- Custom cutting to project-specific lengths available, reducing on-site waste and handling
- Heat number and steel grade stenciled on each bundle for site identification and traceability verification
- FOB, CIF, and DDP logistics options with real-time tracking from Jinan port to destination
Start Your S355J2H Sharp Corner Square and Rectangular Steel Tube Manufacturer Inquiry
Submit your project specifications including section dimensions, wall thickness, steel grade, quantity, and destination port — we respond within 12 hours with detailed quotation, production timeline, and applicable certification documentation. For non-standard sizes outside catalog range, our engineering team provides custom forming solutions with MOQ flexibility for project procurement.
Request Quotation with Mill Test Certificate
Send your specifications to admin@sdxjysteel.com or contact via WhatsApp at +86 188 5315 7756 for pricing, EN10219 certification confirmation, and delivery schedule to your project site.
Frequently Asked Questions
Q: What is the difference between EN10210 and EN10219 for sharp corner rectangular tubes?
A: EN10210 covers hot-formed welded and seamless structural hollow sections, while EN10219 applies to cold-formed welded structural hollow sections. The certification must match the manufacturing process — our cold-formed sharp corner tubes comply with EN10219, ensuring proper material properties and dimensional tolerance for structural applications.
Q: Can you produce non-standard sizes and what is the MOQ for custom sharp corner tubes?
A: Yes, we manufacture non-standard dimensions beyond catalog specifications using our proprietary sharp-corner forming technology. The MOQ is 1 Ton for custom orders, with typical production lead times depending on specification complexity and quantity.
Q: How do you guarantee corner radius accuracy and dimensional tolerance for 90° sharp corners?
A: Our patented sharp-corner forming process maintains ±1% dimensional tolerance across all wall thicknesses up to 50mm. Each production batch undergoes dimensional inspection in our in-house laboratory before release, with results documented in the mill test certificate.
Q: What surface treatment is recommended for outdoor structural use — galvanized, 3PE, or painted?
A: For outdoor exposure, galvanized coating provides excellent corrosion resistance for scaffolding, greenhouse, and civil construction applications. 3PE coating suits aggressive environments requiring enhanced protection, while painted finishes offer aesthetic customization. The selection depends on service environment and project specifications.
Q: Do you provide CE certificates and mill test reports for EU customs clearance?
A: Yes, we supply CE certification under EN10210/EN10219 for EU market compliance, along with original mill test certificates documenting chemical composition and mechanical properties per EN10219. Third-party inspection by SGS or BV is available for pre-shipment verification.
