Core Technical Parameters
1. Basic Standard & Production Process
Executive Standard: EN 10210-1, EN 10210-2
Production Type: Hot Finished Square Hollow Section (Hot Formed SHS)
Surface Condition: Black finish / Pickled / Galvanized (customizable)
Heat Treatment: As rolled / Control rolled (optional)
Certification: ISO 9001, CE Certification, Mill Test Certificate (MTC) available
2. Dimension Range
Wall Thickness: 2mm - 20mm
Square Size: 40×40mm - 400×400mm
Standard Length: 1000mm - 12000mm (custom fixed length available)
Dimensional Tolerance: Strictly compliant with EN 10210 standard, precise size control
3. Mechanical Properties
|
Item |
Standard Value (EN 10210) |
|---|---|
|
Minimum Yield Strength (Re) |
≥355MPa (for thickness ≤16mm) |
|
Tensile Strength (Rm) |
470MPa - 630MPa |
|
Elongation (A) |
≥22% |
|
Impact Test Temperature |
-20℃ (Charpy V-notch, J2 grade) |
|
Impact Toughness |
Compliant with EN ISO 148-1 standard |
4. Chemical Composition (Max Content, %)
|
|
|
|
|
|
|
|---|---|---|---|---|---|
|
C |
Si |
Mn |
P |
S |
Cu |
|
0.22 |
0.55 |
1.60 |
0.035 |
0.030 |
0.55 |
Application
S355J2H square tube is widely used in high-standard structural fields requiring high strength and low-temperature resistance:
- Building structural engineering: Steel columns, building trusses, frame supports
- Mechanical manufacturing: Heavy machinery frames, equipment supports, engineering vehicle structures
- Cold-region construction: Outdoor facilities, bridge auxiliary structures, high-latitude engineering projects
- Offshore & port facilities: Offshore platform auxiliary structures, port equipment brackets
- Steel structure engineering: Prefabricated steel buildings, industrial workshop frames, support structures
Packaging & Shipping
1.Packaging Standards
- Standard Packaging: Bundled with steel strips, fixed with strong steel strapping, anti-slip and anti-collision
- End Protection: Plastic end caps installed on both ends of pipes to prevent port deformation and dust entry
- Surface Protection: Wrapped with waterproof woven cloth and plastic film to prevent moisture, rust and scratch during transportation
- Custom Packaging: Wooden box packaging, pallet packaging available for small-size or high-precision products
- Marking: Each bundle marked with grade, size, length, batch number, standard and weight for traceability
2. Shipping & Delivery
- Port of Shipment: Main Chinese ports (Tianjin, Qingdao, Shanghai, Ningbo)
- Delivery Time: Standard stock goods within 3-7 working days; customized sizes within 10-20 working days
- Shipping Method: Sea freight (FCL/LCL), air freight, land freight (support global delivery)
- Shipping Terms: EXW, FOB, CFR, CIF, DDP (customizable)
- Quality Guarantee: Strict pre-shipment inspection, complete shipping documents (MTC, packing list, invoice, certificate of origin)
FAQ
Q1: What is the difference between S355J2H and S355JR square tube?
The core difference lies in low-temperature toughness. S355JR only supports room-temperature impact test, while S355J2H passes -20℃ low-temperature impact test, with better brittle fracture resistance. It is more suitable for cold regions, dynamic load structures and high-safety-level projects.
Q2: Can you provide customized sizes and fixed-length cutting?
Yes. We support custom wall thickness, square size and fixed-length cutting according to customer drawings and requirements. Non-standard sizes and special processing services (drilling, bending, galvanizing) are all available.
Q3: What quality certificates can you provide?
We can provide official Mill Test Certificate (MTC), CE certificate, ISO 9001 quality system certificate, certificate of origin and other documents to meet global engineering bidding and customs clearance requirements.
Q4: Is S355J2H square tube suitable for outdoor and humid environments?
The original black finish tube has basic rust resistance. For long-term outdoor and humid environment use, we recommend hot-dip galvanizing or anti-corrosion painting treatment to greatly extend service life and enhance corrosion resistance.
Q5: What is your minimum order quantity (MOQ)?
Standard sizes support small batch trial orders (1 bundle). Customized sizes have flexible MOQ based on specifications. We support both bulk wholesale and retail orders to meet different customer needs.
Q6: How to ensure product quality consistency?
All products are produced in strict accordance with EN 10210 standards. We conduct full inspection on dimension, mechanical properties and chemical composition before delivery, with batch sampling test to ensure stable and consistent product quality.
Our address
Rm1406,14th/F No 208, Hongqi Road, Nankai Dist, Tianjin City ,China
Phone Number( WhatsApp/Wechat)
+86 16622033809
alisa@tjshenzhoutong.com
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