Description
Direct Mill Supply for EN10219 Sharp-Corner Tubes — As the original inventor of 90° right-angle rectangular steel tubes in China, we produce S355JR and S355J2H sharp-corner square and rectangular steel tubes directly from our own rolling lines with full EN10219/EN10210 compliance.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | EN10219/EN10210 S355JR/S355J0H/S355J2H Square & Rectangular Steel Tube |
| Product Type | Square & Rectangular Steel Tube (Sharp Corner / 90 Degree) |
| Steel Grade | S235JR, S275JR, S355JR, S355J0, S355J2H, S355J0H, Q460, A36, SS400, ASTM A53 GR.B |
| Standard | EN10219, EN10210, ASTM A53 |
| Section Shape | Square / Rectangular |
| 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, Black |
| Tolerance | ±1% |
| Ends | Plain, Cutting, Threading, Beveled, Flange |
| Corner | Sharp corner 90 degree |
| Application | Steel structures, construction frames, machinery structures, scaffolding, greenhouse, furniture, urban/civil construction, agriculture equipment, low pressure fluid transport |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Facade & Curtain Wall Contractors | Architectural steel framing with sharp-corner RHS for glass curtain wall support systems |
| Construction Companies | Structural tubes for high-rise building frames, bridge components, and infrastructure projects |
| Machinery Manufacturers | Precision structural tubes for equipment frames, conveyor structures, and industrial machinery |
| Steel Structure Fabricators | Raw material for welding and fabrication of steel structures, scaffolding systems |
| Agricultural Equipment | Greenhouse frames, agriculture machinery structures, irrigation support systems |
Where EN10219 Certification Decides Customs Clearance
Missing CE marks or incorrect EN standard references block EU imports — our S355JR sharp-corner tubes ship with full Lloyd’s CE certification under EN10219/EN10210.
Procurement teams ordering EN10219 S355JR sharp corner square rectangular steel tube often face certification gaps that halt shipments at port. Standard rectangular tubes with rounded corners (R≥2t) fail architectural facade requirements, while non-compliant documentation triggers customs rejection across EU markets. We’ve seen entire container loads returned because mill test certificates didn’t match the declared steel grade or lacked proper EN10210 cold-formed hollow section references [NEED_CITE: EN 10219 cold-formed structural hollow section delivery conditions]. The EN10219 S355JR sharp corner square rectangular steel tube supplier you choose must provide verifiable CE documentation, not just claim compliance.
How Sharp-Corner RHS Matches Facade Engineering Requirements
Architectural steel framing for glass curtain walls demands true 90° edges where standard ERW tubes leave rounded corners that create visible gaps at connection points. Our patented sharp-corner forming process produces EN10219 S355JR sharp corner square rectangular steel tube with dimensional accuracy that eliminates secondary machining on site. The ±1% tolerance holds across wall thicknesses from 0.5mm to 50mm, ensuring consistent load transfer in facade support systems. Facade contractors across 50+ countries specify our sharp-corner technology because it delivers both structural performance and clean aesthetic lines without custom fabrication delays.
Structural Compliance and Corrosion Protection Selection
Engineering projects requiring EN10219 S355JR sharp corner square rectangular steel tube must verify compliance with EN 1993 design codes for cold-formed hollow sections [NEED_CITE: EN 1993-1-1 design rules for structural steel]. S355JR provides minimum 355 MPa yield strength at room temperature, while S355J2H adds Charpy impact testing at -20°C for low-temperature applications. Surface treatment selection depends on exposure conditions: hot-dip galvanized coating protects outdoor structural frames, 3PE coating suits buried or submerged applications, and bare/black tubes work for indoor machinery structures where painting occurs after fabrication. CE certification under EN10210/EN10219 remains mandatory for EU customs clearance regardless of surface treatment [NEED_CITE: CE marking requirements for structural steel products in European Union].
Steel Grade Equivalence and Forming Process Explained
S235JR, S275JR, and S355JR represent increasing yield strength levels in the EN standard system, where higher grades reduce section weight for the same load capacity. Q460 from Chinese GB standards and SS400 from JIS G3466 offer similar performance but require careful chemical composition verification when substituting for EN grades. ASTM A53 GR.B serves pressure applications while EN10219 covers structural hollow sections — mixing these standards causes specification errors. Our ERW welding process forms sharp-corner rectangular tubes by cold-forming flat strip through progressive dies that create true 90° edges, unlike conventional rounded-corner tubes where corner radius equals twice the wall thickness. Wall thickness tolerance of ±1% affects theoretical weight calculations: negative tolerance reduces material cost but must stay within EN10219 limits to maintain structural integrity [NEED_CITE: steel grade equivalence mapping between EN ASTM and GB standards].
Hidden Costs of Incorrect Grade Selection and Tolerance Violations
Ordering S355JR when the drawing specifies S355J2H eliminates impact testing requirements, creating structural safety risks in cold climates where brittle fracture becomes possible. Negative tolerance exceeding EN10219 limits reduces actual load capacity below design calculations, triggering rejection during third-party inspection. Missing CE documentation or incorrect EN standard references cause customs detention, demurrage charges, and project delays that dwarf the original material cost difference. We’ve processed returns where SGS inspection found wall thickness variations beyond ±1% tolerance, forcing complete re-rolling and shipment delays [NEED_CITE: dimensional tolerance requirements for cold-formed structural hollow sections].
Why Project Teams Source EN10219 Sharp-Corner Tubes From Our Mill
Our factory holds 41 invention patents including China’s first sharp-corner rectangular tube technology, filling gaps in both domestic and international markets. Three dedicated production lines cover 2,800+ specifications with wall thickness up to 40mm, eliminating the need to source from multiple suppliers for different sizes. In-house physical and chemical laboratories perform dimensional, mechanical, and chemical testing on every heat, with full mill test certificates documenting S355JR chemical composition and yield strength per EN10219. Lloyd’s CE certification under EN10210/EN10219 and Singapore FPC ensure regulated-market compliance, while ISO 9001:2015 certification covers quality management systems. We participated in drafting China’s cold-formed steel industry standards in 2018, demonstrating technical authority in sharp-corner tube manufacturing. Custom non-standard sizes beyond our 2,800+ standard specifications remain available with low MOQ of 1 Ton, and professional container loading with anti-damage measures prevents bending and surface defects during ocean transit.
Documentation & Compliance
- Mill test certificate documenting S355JR chemical composition and yield strength per EN10219, including heat number traceability
- Lloyd’s CE certificate confirming EN10210/EN10219 compliance for sharp-corner square and rectangular hollow sections
- ISO 9001:2015 quality management certificate covering production processes and inspection procedures
- SGS or BV third-party inspection reports with photographic documentation before shipment
- Material traceability records linking each tube to specific heat numbers and production batches
- Complete customs documentation including packing list, bill of lading, and certificate of origin for EU imports
Packaging, Loading & Delivery
- Sharp-corner S355JR tubes bundled with steel strips and edge protectors to preserve 90° corners during handling
- Galvanized surfaces protected with plastic wrapping to prevent zinc coating damage from moisture during ocean transit
- Container loading optimized for 5.8m–14m lengths with anti-bending supports to maintain dimensional tolerance
- Custom cutting available to project-specified lengths, reducing on-site waste and secondary processing
- Heat number and steel grade markings stenciled on each tube for site identification and traceability
- FOB, CIF, and DDP shipping terms available with professional loading supervision for export orders
Getting Your EN10219 Sharp-Corner Tube Quote Started
Submit your specification sheet with section dimensions, wall thickness, steel grade (S355JR/S355J2H), surface treatment, quantity, and destination port. We respond within 12 hours with detailed pricing per ton or per piece, production lead time, and shipping terms. Request mill test certificates and CE documentation for your compliance review before placing orders.
Request EN10219 S355JR Sharp-Corner Tube Pricing
Send your specifications to receive quotations with full mill test certificates 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
Frequently Asked Questions
Q: How do I verify EN10219 S355JR equivalence when my drawing specifies ASTM A500 Gr.C?
A: EN10219 S355JR and ASTM A500 Gr.C have similar yield strength requirements but different chemical composition limits and testing standards. We provide chemical composition mapping between EN, ASTM, and GB standards to ensure material compliance. Our mill test certificates document actual test results so you can verify equivalence before shipment.
Q: What’s the difference between sharp-corner and rounded-corner rectangular tubes for facade applications?
A: Standard ERW rectangular tubes have rounded corners where the radius equals twice the wall thickness (R≥2t), creating visible gaps at connection points in architectural steel framing. Our patented sharp-corner technology produces true 90° edges that eliminate these gaps, providing superior aesthetics and structural performance for glass curtain walls and building facades.
Q: Can you produce non-standard sizes beyond your 2,800+ specifications?
A: Yes, we manufacture custom non-standard dimensions with low MOQ of 1 Ton. Our three production lines cover side lengths up to 1000×1000mm for square tubes and 600×800mm for rectangular tubes, with wall thickness from 0.5mm to 50mm. Send your specific requirements for feasibility confirmation and pricing.
Q: What documents do I need for EU customs clearance with EN10219 steel tubes?
A: EU imports require CE certification under EN10210/EN10219, mill test certificates documenting chemical composition and mechanical properties per EN10219, and complete customs documentation including packing list, bill of lading, and certificate of origin. We provide Lloyd’s CE certificates and third-party inspection reports (SGS/BV) to ensure smooth customs clearance.
Q: How is pricing calculated when wall thickness has negative tolerance?
A: Pricing can be based on theoretical weight (calculated from nominal dimensions) or actual weight (measured after production). Negative tolerance within EN10219 limits reduces actual weight but maintains structural compliance. We clarify pricing methodology in quotations so you understand whether you’re paying for theoretical or actual weight, preventing disputes at delivery.
