Description
Factory-Direct Pricing, No Middlemen — Every S235JRH S355JRH SHS square hollow section steel tube leaves our own production lines, eliminating trading margins and giving you transparent volume-based pricing on every order.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | S235JRH/S355JRH SHS Hollow Section Square Steel Tube |
| Product Type | Square Hollow Section (SHS) |
| Steel Grade | S235JRH, S355JRH, Q235B, ASTM A500, ASTM A53 Gr.B, S275, STK400 |
| Standard | EN 10219, EN 10210, ASTM A500, ASTM A53, GB/T 3091, BS, DIN, JIS G3466 |
| Section Shape | Square |
| Size Range | 19mm×19mm – 800mm×800mm |
| Wall Thickness | 1 – 30 mm |
| Length | 5.8m / 6m / 11.8m / 12m / Random Length |
| Technique | Welded / Seamless |
| Surface Treatment | Black Painting / Galvanized / Varnish / Bare |
| Tolerance | ±1% |
| Ends | Plain |
| Application | Steel structures, construction frames, building structures, curtain walls, support tubes, machinery, scaffolding |
| MOQ | 5 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Construction & Building | Column frames, curtain wall support systems, roof trusses, floor beam grids |
| Infrastructure & Civil Engineering | Bridge handrails, highway sound barriers, foundation piling cages, retaining structures |
| Industrial & Machinery | Conveyor frames, equipment support bases, crane booms, platform structures |
| Scaffolding & Temporary Works | Load-bearing vertical standards, ledger tubes, transom members, shoring towers |
| Steel Fabrication & Wholesale | Multi-grade bulk stock for traders, cut-to-length blanks, welded assembly components |
What Wall-Thickness Tolerance Costs on a Structural Frame Order
Tight tolerance on S235JRH S355JRH SHS square hollow section steel tube walls determines whether your frame passes structural inspection or gets rejected at site.
When wall thickness drifts into heavy negative tolerance, the theoretical weight no longer matches actual weight — and that gap shows up fast during third-party inspection at the destination port. I have seen containers held at discharge ports because the client’s surveyor flagged weight discrepancies against the packing list. The result is not just a customs headache; it is project delay, re-measurement costs, and sometimes partial rejection of the entire shipment. For structural hollow sections, ±1% tolerance is not a marketing claim — it is the difference between a smooth site acceptance and a costly dispute. [NEED_CITE: EN 10219 dimensional tolerance requirements for cold-formed hollow sections]
How S355JRH SHS Matches Structural Frame Demands
Square hollow sections in S355JRH grade deliver the combination of higher yield strength and clean geometric profile that structural engineers specify for moment-resisting frames. The flat faces of SHS simplify bolted and welded connections, while the closed section provides torsional rigidity that open profiles cannot match. On a recent high-rise project in South America, our S355JRH SHS tubes were specified for both primary columns and secondary bracing — the same material grade across the frame simplified procurement and reduced on-site sorting errors. The S235JRH S355JRH SHS square hollow section steel tube range from 19×19mm to 800×800mm covers everything from light gauge bracing to heavy primary members in a single sourcing channel.
Structural Compliance and Certification Pathways
Engineering codes such as EN 1993 for European projects and AISC specifications for North American work both require documented material traceability back to the heat number. When your S235JRH S355JRH SHS square hollow section steel tube carries CE marking under EN 10219 or EN 10210, customs clearance in EU markets becomes a documentation exercise rather than a risk. For ASTM A500 or A53 projects, the same traceability principle applies — mill test certificates must confirm chemical composition and mechanical properties against the specified standard. Surface treatment selection also matters: galvanized finish protects against corrosion in exposed environments, while black painting or bare finish suits indoor structural work or further fabrication. [NEED_CITE: CE marking requirements for structural steel hollow sections under EN 10210]
Steel Grade Selection and Manufacturing Process Explained
The S-series grades — S235JRH, S275, S355JRH — follow the European EN standard system where the number indicates minimum yield strength in MPa. S355JRH offers roughly 50% higher yield capacity than S235JRH, making it the preferred choice for heavily loaded columns and long-span beams, while S235JRH remains cost-effective for lighter bracing and secondary members. The Q235B grade serves as the Chinese domestic equivalent, and ASTM A500 Gr.B covers the North American specification — all three can be supplied from the same production facility with proper documentation. Welded (ERW) hollow sections suit the majority of structural applications where cost efficiency matters, while seamless tubes serve high-pressure or critical load paths where uniform wall integrity is essential. Wall thickness tolerance of ±1% ensures that the delivered section modulus matches the engineer’s calculation — a factor that becomes critical when negative tolerance erodes load capacity. [NEED_CITE: steel grade equivalence mapping between EN S-series and ASTM A500]
Hidden Costs of Sourcing the Wrong Grade or Missing Certificates
Ordering S235JRH when the structural drawing specifies S355JRH means the delivered tubes cannot carry the design load — and no amount of paperwork will fix that at site inspection. Similarly, shipping without CE certificates to an EU destination guarantees customs detention, regardless of whether the material itself is sound. Negative tolerance beyond the allowed ±1% range means the client pays for steel that is not there, and the structural engineer’s safety margins shrink accordingly. These are not theoretical risks — they are recurring problems in international steel procurement that trace back to supplier selection and verification processes. [NEED_CITE: structural steel non-compliance consequences in international construction projects]
Why Procurement Teams Source S235JRH S355JRH SHS Square Hollow Section Steel Tube From Us
Our production lines run three shifts simultaneously, delivering monthly capacity exceeding 20,000 tons of hollow sections across the full size range from 19×19mm to 800×800mm. Every bundle ships with original mill test certificates documenting chemical composition and mechanical properties — not copies, not summaries, but the primary document tied to the heat number. We hold CE certification under both EN 10210 and EN 10219, plus ISO 9001:2015, so your compliance paperwork is complete before the container is sealed. Third-party inspection through SGS or BV can be arranged at our facility before loading, giving you independent verification without travel costs. Our export team handles container loading optimization — critical for heavy SHS tubes where improper weight distribution causes shifting during ocean transit — and we offer flexible MOQ from trial orders to full-project bulk supply. Factory-direct pricing means no trading company margin sits between you and the mill.
Documentation & Compliance
- Mill test certificate documenting S235JRH or S355JRH chemical composition, yield strength, and tensile properties per EN 10219, traceable to heat number
- CE certificate covering EN 10210 for hot-finished hollow sections and EN 10219 for cold-formed sections, required for EU customs and project handover
- ISO 9001:2015 quality management certificate confirming production process control and inspection protocols
- SGS or BV third-party inspection report available upon request, covering dimensional checks, visual inspection, and witness testing
- Material traceability sheet linking each bundle to its heat number, steel grade, and production date
- Full customs documentation package including packing list, bill of lading, and certificate of origin for destination clearance
Packaging, Loading & Delivery
- S235JRH S355JRH SHS square hollow section steel tubes bundled with steel strips and edge protectors to prevent coating damage during handling and ocean transit
- Galvanized finish tubes wrapped with waterproof paper and plastic sleeves to preserve zinc coating integrity in humid shipping conditions
- Container loading plans optimized for 5.8m and 6m lengths to maximize 20ft and 40ft GP utilization, with weight distribution calculated to prevent shifting
- Black painted or bare finish tubes coated with anti-rust oil on inner and outer surfaces before bundling for extended storage protection
- Each bundle tagged with heat number, steel grade, size specification, and length for site identification and traceability verification
- FOB, CIF, and DDP shipping terms available with professional export documentation handling for smooth destination port clearance
Getting Your S235JRH S355JRH SHS Square Hollow Section Steel Tube Quote Started
Send your specification sheet covering section size, wall thickness, steel grade, total quantity, and destination port — we respond within 12 hours with pricing, production lead time, and available mill test certificate formats. For non-standard sizes or custom lengths outside the 5.8m to 12m range, we provide technical feedback on feasibility and minimum order requirements. If your project requires CE certification verification or third-party inspection before loading, confirm this at inquiry stage so we schedule the survey accordingly.
Frequently Asked Questions
Q: What is the difference between S235JRH and S355JRH for structural applications?
A: S355JRH provides higher minimum yield strength than S235JRH, making it suitable for heavily loaded structural members such as primary columns and long-span beams. S235JRH serves well for lighter bracing, secondary members, and applications where weight optimization is less critical. Both grades are available in the same size range from 19×19mm to 800×800mm with identical tolerance standards.
Q: Can you provide mill test certificates for customs clearance?
A: Yes, every shipment of S235JRH S355JRH SHS square hollow section steel tube includes original mill test certificates documenting chemical composition and mechanical properties, traceable to the specific heat number. These certificates meet international customs and project handover requirements.
Q: What surface treatment options are available for different environments?
A: We offer galvanized finish for corrosion protection in exposed or outdoor environments, black painting for indoor structural work or aesthetic requirements, varnish coating for temporary protection, and bare finish for applications requiring further fabrication or on-site coating. The choice depends on your project environment and fabrication sequence.
Q: Do you support third-party inspection before shipment?
A: Yes, SGS and BV third-party inspections can be arranged at our facility before container loading. This covers dimensional verification, visual inspection, and witness testing if required by your project specification or import regulations.
Q: What is the minimum order quantity for trial orders?
A: The standard MOQ is 5 tons, which supports trial orders for new customers or small-batch procurement for specific project phases. We also accommodate split shipments and consolidated multi-product container loading for ongoing supply partnerships.
Secure Your S235JRH S355JRH SHS Square Hollow Section Steel Tube Supply Today
Submit your specifications via email or WhatsApp to receive competitive factory-direct pricing, mill test certificate confirmation, and production scheduling 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
