Description
Factory-direct S355J0H SHS/RHS — Produced on 3 dedicated lines with in-house physical and chemical laboratories, every batch tested before shipment.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | S355J0H Square Hollow Section Tube |
| Product Type | Square / Rectangular Hollow Section (SHS/RHS) |
| Steel Grade | S355J0H, S235, S275, S355, STK400, Gr.B |
| Standard | EN 10210-1, EN 10219, ASTM A500, ASTM A53, GB/T 3091, ISO 10799-1 |
| Section Shape | Square / Rectangular |
| Size Range | 19mm×19mm – 800mm×800mm |
| Wall Thickness | 1 – 50 mm |
| Length | 5.8m / 6m / 11.8m / 12m / Random Length |
| Technique | ERW / Welded / Seamless |
| Surface Treatment | Black Painting / Galvanized (Hot Dipped) / Varnish / Bare |
| Tolerance | ±5% |
| Ends | Plain End with Plastic Caps |
| Application | Steel structures / Construction frames / Curtain walls / Support structures / Machinery / Building frames |
| MOQ | 10 tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| EPC Contractors | Steel structure frames for industrial plants and warehouse buildings |
| Construction Companies | High-rise building columns, curtain wall support systems, bridge handrails |
| Machinery Manufacturers | Equipment base frames, conveyor support structures, crane booms |
| Infrastructure Developers | Solar mounting structures, sound barrier posts, utility pole bases |
Where Tolerance Drift on S355J0H SHS Costs More Than the Steel Itself
A 2mm wall-thickness deviation on a 400×400 column changes the load-bearing calculation entirely — and no mill certificate can cover what the lab did not actually test.
Global EPC contractors ordering S355J0H square hollow section tube from fragmented suppliers repeatedly encounter the same sequence: the mill cert looks clean, the third-party inspector signs off at the gate, and then the receiving lab pulls a random piece off the truck and finds yield strength below the EN 10219 floor. The entire batch sits at port waiting for re-verification while the crane stands idle. [NEED_CITE: EN 10219 cold-formed structural hollow section dimensional and mechanical tolerances]
How Wall-Thickness Range and Surface Finish Match Real Site Conditions
S355J0H square hollow section tube covering 19×19mm to 800×800mm with wall thickness from 1mm to 50mm means a single supplier can feed the light-gauge purlins and the heavy-duty base columns from the same heat lot — eliminating the grade-mismatch risk when different batches land on the same drawing. Hot-dip galvanized finish handles coastal or industrial atmospheres where black painting would corrode within two seasons, while bare or varnished ends stay weld-ready for fabricators who need to join on site without grinding through a zinc layer first.
Structural Code Compliance and Certification Pathways
EN 10210-1 and EN 10219 govern hot-finished and cold-formed hollow sections respectively — the choice between them determines whether the S355J0H tube arrives with residual stress profiles suited for dynamic loading or static frames. [NEED_CITE: EN 10210 versus EN 10219 application scope for structural hollow sections] For EU projects, CE certification under these standards is not optional; customs authorities at Rotterdam or Jebel Ali hold shipments lacking the Declaration of Performance. ASTM A500 Gr.B or Gr.C equivalents serve North American specifiers, and original mill test certificates with heat-number traceability satisfy both the structural engineer’s verification and the port authority’s documentation check.
Steel Grade Selection and Manufacturing Process Explained
S-series grades (S235, S275, S355) follow the European system where the number indicates minimum yield strength in MPa — S355J0H specifically adds the J0 suffix for 0°C Charpy impact testing, distinguishing it from S355JR which tests only at room temperature. ERW welded tubes suit general structural applications where cost efficiency matters, while seamless options handle higher pressure or more demanding fatigue conditions. Wall thickness tolerance of ±5% means a nominal 10mm wall can legally measure 9.5mm — procurement teams who do not specify tighter commercial tolerances accept that variance in their tonnage calculations. [NEED_CITE: steel grade equivalence mapping between EN 10219 and ASTM A500]
The Hidden Price of Unverified Material and Missing Certificates
When a 500-ton order of S355J0H square hollow section tube arrives without proper EN 10219 CE marking, the project does not just face a customs fine — the structural engineer must either reject the material outright or commission expensive retroactive testing that delays the steel erection schedule by weeks. Negative tolerance abuse compounds the problem: if every tube in the shipment measures at the low end of the ±5% band, the theoretical weight invoiced exceeds the actual delivered tonnage, and the load-bearing capacity drops below the design assumption. [NEED_CITE: consequences of dimensional tolerance non-compliance in structural steel procurement]
Why Engineering Procurement Teams Specify Xin Jiyuan for S355J0H SHS
Three dedicated production lines covering over 2,800 specifications mean the 800×800×50 column and the 25×25×2 brace tube ship from the same facility with unified quality control. The in-house physical and chemical laboratory runs tensile and impact tests on every heat before release — no outsourcing to third-party labs that might rubber-stamp without re-testing. Forty-one invention patents include proprietary sharp-corner rectangular tube technology that eliminates the radius gap when SHS meets flat plate connections. CE certification under EN 10210 and EN 10219, ISO 9001:2015 registration, and SGS/BV verification cover EU, Middle East, and Southeast Asian customs requirements. Exports to over 50 countries include repeat orders from EPC contractors who learned the hard way that factory-direct sourcing with verified mill certificates costs less than re-inspecting suspect material at destination.
Documentation & Compliance
- Mill test certificate documenting S355J0H chemical composition and mechanical properties per EN 10219, with heat number traceability from slab to finished tube
- CE certificate of conformity under EN 10210-1 and EN 10219 for EU market customs clearance and structural code compliance
- ISO 9001:2015 quality management system certificate covering the full production and testing process
- SGS or BV third-party inspection report available upon request before shipment, verifying dimensional tolerance and surface finish
- Material traceability report linking each bundle to its original heat number and test specimen results
- Complete customs documentation package including packing list, bill of lading, and certificate of origin
Packaging, Loading & Delivery
- S355J0H SHS/RHS bundled with high-tensile steel strips at six points minimum, with edge protectors preventing zinc coating damage on hot-dip galvanized tubes during ocean transit
- Black painted or varnished surfaces wrapped in waterproof paper with plastic cap protection on plain ends to prevent moisture ingress and end deformation
- Container loading optimized for 5.8m and 6m lengths in 20ft containers, 11.8m and 12m lengths in 40ft containers, with weight distribution calculated to maximize payload without exceeding port handling limits
- Random length or cut-to-order lengths available per project drawing, with cutting tolerance held to ±5mm for fabrication-ready delivery
- Heat number and steel grade stenciled on each tube end plus bundle tag identification for site receiving verification
- FOB, CIF, and DDP shipping terms available with professional loading plans and real-time tracking to ports across EU, North America, Middle East, and Southeast Asia
How to Initiate Procurement for S355J0H Structural Hollow Sections
Submit your specification sheet including section dimensions, wall thickness, steel grade, total tonnage, and destination port — the engineering team returns a detailed quotation with unit price, production lead time, payment terms, and applicable certification documentation within 12 hours. Non-standard sizes outside the 19×19mm to 800×800mm range are available for custom order with confirmed MOQ.
Request Your S355J0H SHS Quotation with Mill Test Certificate
Send your specifications via email to admin@sdxjysteel.com or contact the international team at +86 188 5315 7756 (WhatsApp/WeChat available) for factory-direct pricing and certification confirmation.
Frequently Asked Questions
Q: What is the difference between S355J0H, S355J2H, and S355JR in impact testing requirements?
A: The suffix indicates the Charpy impact test temperature — S355J0H requires testing at 0°C with minimum 27J energy absorption, S355J2H tests at -20°C for colder climate applications, while S355JR only requires room temperature impact testing. Choose J0H for moderate cold environments and J2H for northern Europe or high-altitude projects.
Q: Can you provide EN 10210 and EN 10219 CE certificates for EU customs clearance?
A: Yes, all S355J0H square hollow section tubes produced under these standards carry CE certification with Declaration of Performance documentation. The CE certificate, mill test certificate, and quality documentation package satisfies EU port authority requirements and structural engineer verification.
Q: What is the MOQ for custom non-standard square hollow sections outside your standard range?
A: The standard MOQ is 10 tons for catalog specifications from 19×19mm to 800×800mm. Custom non-standard sizes require confirmation based on section dimensions and wall thickness — contact the engineering team with your drawing for specific MOQ and production timeline.
Q: Hot-dip galvanized versus black finish — which suits my project environment?
A: Hot-dip galvanized finish provides long-term corrosion protection for outdoor, coastal, or industrial atmosphere applications, while black painted or bare finish suits indoor structural frames or projects where field welding is required without grinding through zinc. Varnish offers temporary protection during transit and storage before final coating on site.
Q: How do you ensure container loading optimization for heavy structural tubes?
A: Professional loading plans calculate weight distribution and maximize payload for 5.8m/6m lengths in 20ft containers and 11.8m/12m lengths in 40ft containers. The logistics team coordinates port handling limits and provides real-time tracking from factory to destination under FOB, CIF, or DDP terms.
