Description
Factory-Direct S355J0H SHS — Every batch tested for 0°C impact toughness before shipment.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | S355J0H Square Hollow Section Tube |
| Product Type | Square Steel Tube / Square Hollow Section (SHS) |
| Steel Grade | S355J0H, S235, S275, S355, Gr.B, STK400 |
| Standard | EN 10219, EN 10210, ASTM A500, ASTM A53, GB/T 3091, ISO 10799-1 |
| Section Shape | Square |
| Size Range | 19mm × 19mm – 800mm × 800mm |
| Wall Thickness | 1 – 50 mm |
| Length | 5.8m – 12m (also 6m / 11.8m / random length) |
| Technique | Welded (ERW) / Seamless |
| Surface Treatment | Black Painting / Hot-dip Galvanized / Varnish / Bare |
| Tolerance | ±5% |
| Ends | Plain ends with plastic caps |
| Application | Steel structures / Construction frames / Curtain wall systems / Support tubes / Building structures / Machinery frames |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| EPC Contractors | Load-bearing column frames for industrial warehouses and commercial buildings |
| Urban Construction | Curtain wall support tubes and facade structural grids |
| Infrastructure | Bridge access structures and sound barrier support frames |
| OEM Manufacturing | Machinery base frames and equipment support platforms |
| Steel Traders | Stock redistribution in standard and non-standard SHS sizes |
What Charpy Impact Testing at 0°C Means for Your Structural Frame
S355J0H requires verified impact energy at zero degrees — a spec that separates structural-grade SHS from generic welded tube.
I once watched an entire container of S355J0H square hollow sections sit idle at Jebel Ali for twenty days because the Charpy V-notch results fell below J0 threshold during SGS re-inspection. The mill cert looked perfect on paper, but the actual impact toughness did not match the heat number. That kind of failure does not show up in visual inspection — it shows up when the structure faces cold-region loading or dynamic stress. For buyers sourcing a S355J0H square hollow section tube supplier, the question is never just about dimensions. It is about whether the steel inside the tube can survive the conditions your engineer designed for. [NEED_CITE: EN 10210 hot-finished structural hollow sections impact testing requirements]
Matching S355J0H SHS to Structural Load Paths and Connection Details
The 19×19mm to 800×800mm size range of our S355J0H square hollow section tube covers everything from light-gauge curtain wall mullions to heavy column sections in portal frames. The flat face of square hollow sections allows direct bolted or welded connection without gusset plates, reducing fabrication time on site. For EPC contractors working on multi-storey steel frames, the ±5% wall thickness tolerance ensures that connection calculations remain valid across every piece in the bundle. We run welded ERW and seamless lines simultaneously, so a single order can mix cost-efficient ERW sections for secondary framing with seamless tubes for high-stress nodes.
Structural Compliance Across EN, ASTM, and GB Frameworks
S355J0H conforms to EN 10219 for cold-formed and EN 10210 for hot-finished structural hollow sections, making it directly acceptable under Eurocode 3 design rules. For projects requiring ASTM compliance, the same S355J0H square hollow section tube can be cross-referenced to ASTM A500 Grade C in many jurisdictions, though formal equivalence depends on the engineer of record. [NEED_CITE: steel grade equivalence between EN 10219 and ASTM A500] CE certification under EN 10210 and EN 10219 is mandatory for European market entry, and every batch we ship carries the FPC mark alongside original mill test certificates. Wall thickness from 1mm to 50mm covers both thin-gauge purlin systems and thick-walled column sections, with lengths up to 12m reducing the number of site splices required.
Understanding S355J0H: The J0 Designation and ERW vs Seamless Choice
The “J0” in S355J0H specifies Charpy V-notch impact testing at 0°C with a minimum energy absorption value — this is what distinguishes it from S355JR (tested at +20°C) and makes it suitable for unheated structures in temperate and cold climates. The “H” denotes hollow section product standard compliance. Within the S-series, yield strength steps from S235 to S275 to S355, each grade offering higher load capacity for the same cross-section. For buyers comparing standards, S355J0H broadly corresponds to Q345B in the GB system and approaches ASTM A500 Gr.C, though chemical composition limits differ slightly. [NEED_CITE: S355J0H impact test temperature and energy requirements per EN 10219]
On the production side, ERW welded S355J0H square hollow sections offer lower cost and tighter dimensional tolerance for standard structural applications, while seamless variants serve higher-pressure or critical-load scenarios where weld line integrity is a concern. Surface treatment choice directly affects lifecycle cost: hot-dip galvanized S355J0H SHS resists corrosion in outdoor and coastal environments without ongoing maintenance, while black painting or bare finish suits indoor structures or projects where the buyer applies their own coating system. The ±5% thickness tolerance is standard across EN 10219, but buyers invoicing by theoretical weight should confirm whether the supplier applies actual or nominal weight — this affects per-ton cost transparency.
The Hidden Cost of Unverified Steel Grade on a Structural Project
When S355J0H tubes arrive at site with mill certificates that do not match the physical material, the consequences cascade: third-party re-inspection fails, the structural engineer rejects the batch, customs holds the shipment for documentation gaps, and the project timeline slips by weeks. [NEED_CITE: consequences of non-compliant structural steel in construction projects] A S355J0H square hollow section tube supplier who cannot provide heat-number traceability or who ships without CE marking for European destinations creates liability that no price discount can offset. The real cost of cheap, unverified SHS is never the invoice — it is the re-fabrication, the delay penalty, and the structural safety risk that follows.
Why Project Buyers and Traders Source S355J0H SHS From Us
We operate three production lines running simultaneously, producing over 20,000 tons monthly across welded and seamless square hollow sections. Every S355J0H square hollow section tube leaves our facility with an original mill test certificate showing chemical composition and mechanical properties tied to the specific heat number. Our in-house理化 laboratory conducts three-stage inspection before shipment, and we welcome SGS or BV third-party inspection at the buyer’s request. With 2,800+ specifications in ready stock, we fulfill urgent split shipments for traders while holding production slots for project buyers on phased delivery schedules. Factory-direct pricing means no trading company margin, and volume discount programs reward long-term partners with pricing reviews every six months. Our export team handles container loading optimization — consolidating SHS with angle bar, channel, and plate in a single shipment to reduce per-unit freight cost.
Documentation & Compliance
- Mill test certificate documenting S355J0H chemical composition (C, Mn, Si, P, S, CEV) and mechanical properties including 0°C Charpy impact energy per EN 10219
- CE certificate under EN 10210 and EN 10219 for Factory Production Control, required for structural steel placement in European Economic Area markets
- ISO 9001:2015 quality management certificate covering the full production and inspection workflow for S355J0H square hollow sections
- SGS or BV third-party inspection report available upon request, covering dimensional check, surface quality, and witness testing of impact specimens
- Full heat number traceability from slab to finished tube, marked on each piece and cross-referenced on the mill test certificate
- Export documentation package including packing list, bill of lading, certificate of origin, and commercial invoice for customs clearance at destination port
Packaging, Loading & Delivery
- S355J0H SHS bundled with steel strips and edge protectors, sized to match the 19×19mm to 800×800mm range and 5.8m–12m length for secure ocean transit
- Hot-dip galvanized tubes wrapped with waterproof paper and separated by rubber spacers to prevent zinc coating abrasion during handling and shipping
- Container loading plan optimized per order: 20ft containers for 5.8m lengths, 40ft HC for 11.8m and 12m pieces, with nested smaller sections inside larger SHS to maximize payload
- Heat number and steel grade stenciled on each tube end, with bundle tags showing size, thickness, length, and heat number for site identification
- FOB, CIF, and DDP terms available; professional export team manages customs documentation and coordinates with forwarders for door-to-door delivery to 50+ countries
Ready to Verify S355J0H SHS Quality Before You Commit
Submit your specification sheet — sizes, wall thickness, steel grade, quantity, and destination port — and receive a detailed quotation with factory-direct pricing, production lead time, and a sample mill test certificate from our most recent S355J0H batch. For non-standard dimensions or mixed-container orders, we provide a consolidated loading plan within the same response.
Request Your S355J0H SHS Quotation and Mill Test Certificate Today
Send your specifications to admin@sdxinjiyuan.com or contact us via WhatsApp at +86 188 5315 7756. We respond within 12 hours with pricing, certification details, and available stock confirmation.
Frequently Asked Questions
Q: How does S355J0H compare to ASTM A500 Grade C and GB Q345B?
A: S355J0H is a European structural steel grade under EN 10219/EN 10210 with specified 0°C Charpy impact testing. It broadly corresponds to Q345B in the Chinese GB system and is often cross-referenced to ASTM A500 Grade C, though chemical composition and impact test requirements differ. We provide grade equivalence documentation for your engineer’s review.
Q: What documentation comes with each shipment of S355J0H square hollow section tubes?
A: Every batch ships with original mill test certificates showing chemical composition and mechanical properties tied to the heat number. CE certificates under EN 10210 and EN 10219 are included for European destinations. SGS or BV third-party inspection reports are available upon request before shipment.
Q: Can I order non-standard sizes or mixed specifications in one container?
A: Yes. We hold 2,800+ specifications in stock and produce custom sizes with typical lead times of 15–25 days. MOQ starts at 1 ton for trial orders. We consolidate multiple products — SHS, RHS, round pipe, angle bar, plate — into a single container to optimize freight cost.
Q: What surface treatment options are available for S355J0H SHS?
A: We offer hot-dip galvanized, black painting, varnish, and bare finish. Hot-dip galvanizing suits outdoor and corrosive environments. Black painting or bare finish works for indoor structures or projects where the buyer applies a custom coating system.
Q: How do you ensure the Charpy impact toughness meets J0 requirements?
A: Our in-house laboratory conducts three-stage inspection including Charpy V-notch testing at 0°C for every heat lot. The impact energy results are recorded on the mill test certificate. We welcome SGS or BV witness testing at the factory before shipment for buyer verification.
