Description
Factory-direct S355J0H RHS — every S355J0H rectangular hollow section tube rolls off our own ERW lines with original mill test certificates, no trading markup.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | S355J0H Rectangular Hollow Section Tube |
| Product Type | Rectangular Steel Tube / Rectangular Hollow Section (RHS) |
| Steel Grade | S355J0H, S235, S355, GrB, S275, STK400 |
| Standard | ISO 10799-1, ASTM A500, ASTM A53, GB/T 3091, EN 10219, EN 10210 |
| Section Shape | Rectangular / Square / Round |
| Size Range | 15mm×20mm – 700mm×800mm |
| Wall Thickness | 1 – 50 mm |
| Length | 5.8m / 6m / 11.8m / 12m / Random Length |
| Technique | Welded ERW / Seamless |
| Surface Treatment | Galvanized (Zinc Coating) / Black Painting / Varnish / Bare / Slightly Oiled |
| Tolerance | ±10% |
| Ends | Plastic Pipe Cap / Iron Protector |
| Application | Steel structures / Construction frames / Building structures / Curtain walls / Support tubes / Machinery / Fertilizer equipment |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Construction & Infrastructure | Building frames, curtain wall support structures, commercial project columns |
| Steel Structure Fabrication | Machinery bases, equipment frames, scaffolding systems requiring high dimensional accuracy |
| Belt & Road EPC Projects | Multi-category consolidated supply for infrastructure builds across Southeast Asia, Middle East, and Africa |
Where EN 10219 Certification Decides Customs Clearance for Your S355J0H Rectangular Hollow Section Tube
Missing CE documentation turns a routine shipment into a port-side detention.
Buyers sourcing S355J0H rectangular hollow section tube for European or Middle Eastern projects frequently discover — after the container has already sailed — that their supplier cannot produce EN 10219 or EN 10210 compliance paperwork. The result is customs rejection, demurrage fees, and in some cases, the structural steel must be re-ordered from a certified source while the original cargo sits in bonded storage. [NEED_CITE: EN 10219 cold-formed structural hollow sections compliance requirements]
Beyond certification gaps, inconsistent wall thickness tolerance across batches creates another hidden failure point. When a 50mm-thick RHS arrives at a fabrication yard measuring outside the ±10% band, the entire load may fail incoming inspection — not because the steel grade is wrong, but because dimensional control was never verified at the mill.
How S355J0H RHS Matches Structural Frame Load Requirements
S355J0H rectangular hollow section tube delivers the yield strength tier that structural engineers specify for medium-to-heavy load frames — higher than S235 for reduced section weight, without the cost premium of quenched-and-tempered grades. The rectangular profile provides flat bearing surfaces for bolted and welded connections, eliminating the gusset plates that round tubes require at every joint. Our ERW production holds the dimensional accuracy that curtain wall and scaffolding applications demand, where even 2mm of corner deviation can cascade into alignment failures across a multi-story frame.
Engineering Compliance and Corrosion Environment Selection
Structural frames designed under EN 1993 or AISC standards require documented steel grade traceability back to the heat number — not just a generic “S355” stamp on the bundle. [NEED_CITE: structural steel traceability requirements per EN 10210] For outdoor or humid environments, hot-dip galvanized S355J0H rectangular hollow section tube resists corrosion without field-applied coatings that add project timeline. In contrast, black painting or varnish treatment suits indoor fabrication shops where the tube will be welded, cut, and finished before final installation. The 1–50mm wall thickness range covers everything from light-gauge curtain wall supports to heavy-load column sections, with the same mill certificate backing every thickness.
Steel Grade Selection and ERW Process Fundamentals
The S-series designation (S235, S275, S355J0H) follows the European EN standard system where the number indicates minimum yield strength in MPa — S355J0H delivers higher load capacity than S235, allowing engineers to specify smaller cross-sections for the same structural requirement. The “J0” suffix confirms Charpy impact testing at 0°C, essential for projects in temperate or cold climates where brittle fracture risk exists. [NEED_CITE: steel grade equivalence between EN 10219 and ASTM A500 standards]
ERW welded production forms the tube from coiled strip through continuous forming and high-frequency welding — more cost-effective than seamless for structural applications where internal pressure is not a factor. The welded seam in S355J0H RHS undergoes the same quality control as the parent material, and the rectangular profile’s flat surfaces make seam inspection visually straightforward during incoming quality checks.
Surface treatment choice directly affects project timeline and lifetime maintenance cost. Hot-dip galvanizing adds corrosion resistance measured in decades for outdoor structures, while bare or slightly oiled tubes ship at lower cost for indoor projects where fabrication and painting happen on-site.
The Hidden Cost of Unverified S355J0H Rectangular Hollow Section Tube
Accepting a lower price from an uncertified supplier often means accepting tubes rolled from off-grade scrap or blended heats that fail Charpy impact testing at the specified temperature. When these tubes reach the fabrication yard and the welder cracks the seam during routine joining, the entire batch must be quarantined, tested, and potentially rejected — turning a per-ton saving into weeks of project delay. [NEED_CITE: consequences of non-compliant structural steel in construction projects]
Missing mill test certificates create a compounding problem: without heat-number traceability, the structural engineer cannot sign off on the completed frame, and the building inspector cannot issue occupancy certification. The steel may be perfectly adequate — but without documentation, it is legally unusable.
Why Global Buyers Source S355J0H Rectangular Hollow Section Tube From Xin Jiyuan
Our three ERW production lines run simultaneously in Jinan, delivering monthly capacity that supports full-container bulk orders without queuing behind smaller clients. Every S355J0H rectangular hollow section tube ships with original mill test certificates documenting chemical composition and mechanical properties per EN 10219 — not a reprinted template, but the actual lab report from the heat that produced your steel.
We maintain ready stock across 2,800+ specifications covering the full 15mm×20mm to 700mm×800mm size range, so standard orders ship within days rather than waiting for a production slot. For custom non-standard dimensions or specific length requirements, our in-house理化 lab and three-stage quality control process ensure every tube meets tolerance before it reaches the loading bay.
CE certification under EN 10210 and EN 10219, combined with ISO 9001:2015 registration, means your S355J0H RHS clears European and international customs without documentation disputes. And because we handle container loading optimization in-house — applying lessons learned from decades of port-side loading supervision — your tubes arrive without the crushed corners and weld cracks that plague poorly braced shipments.
Documentation & Compliance
- Mill test certificate documenting S355J0H chemical composition and mechanical properties per EN 10219, traceable to individual heat number
- CE certificate confirming compliance with EN 10210 (seamless) and EN 10219 (welded) structural hollow section standards for European market access
- ISO 9001:2015 quality management certificate covering the full production process from raw material incoming inspection to final dimensional verification
- SGS or BV third-party inspection report available upon request, conducted at our facility before container sealing
- Material traceability documentation linking each bundle to its production heat, with steel grade and dimensional test results recorded
- Complete customs documentation package including packing list, bill of lading, and certificate of origin formatted for destination port requirements
Packaging, Loading & Delivery
- S355J0H rectangular hollow section tubes bundled with steel strips and edge protectors to preserve surface treatment — whether galvanized zinc coating or painted finish — during ocean transit
- Container loading optimized for RHS geometry: rectangular profile nests efficiently in 20ft and 40ft containers, with wooden chocks preventing shift during rough-sea transit
- Standard lengths of 5.8m and 6m fit standard container dimensions without overhang; 11.8m and 12m lengths ship in open-top or flat-rack containers with professional lashing
- Each bundle marked with heat number, steel grade S355J0H, size specification, and production date for yard identification and traceability
- FOB Jinan, CIF destination port, or DDP door-to-door delivery terms supported, with professional export team handling customs clearance and logistics coordination
- Plastic pipe caps or iron protectors fitted to tube ends to prevent moisture ingress and edge damage during handling and transport
How to Request a Quotation for S355J0H Rectangular Hollow Section Tube
Submit your specifications — including size, wall thickness, steel grade, quantity, and destination port — via email, WhatsApp, or phone, and receive a competitive bulk quotation within 12 hours. We will confirm stock availability for standard sizes or provide a production timeline for custom dimensions, along with sample mill test certificates and CE documentation for your compliance review.
Get Your S355J0H RHS Quote With Mill Test Certificates
Send your specifications to receive factory-direct pricing, stock confirmation, and compliance documentation within 12 hours.
Contact: Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxinjiyuan.com
Website: www.sdxinjiyuan.com
Address: No.11889, Jingshi West Road, Lulian Group, Jinan City, Shandong Province, China
