Hebei Huayang Steel Pipe Co., Ltd is one of the most experienced manufacturers and suppliers of en 10219 245×4.9 s355j2h in China. Welcome to buy discount en 10219 245×4.9 s355j2h made in China here from our factory. Quality products and low price are available.
Product introduction
EN 10219 245×4.9 S355J2H Cold-Formed Welded Hollow Section Product Details
Product Description
This product is high-quality cold-formed welded hollow section, manufactured strictly in accordance with EN 10219-1:2006 standard. It adopts S355J2H steel grade, a non-alloy structural steel with superior low-temperature toughness, excellent mechanical properties, outstanding weldability and high dimensional accuracy. Featuring stable high strength, reliable impact resistance at sub-zero temperatures and cost-effectiveness, it is widely used in building structures, bridge trusses, mechanical engineering, offshore structures, low-temperature facilities and other critical fields, perfectly meeting the requirements of low-temperature working conditions and heavy-load structural applications.
Basic Specification & Standard
Executive Standard: EN 10219-1:2006 (European Standard for Cold Formed Welded Hollow Sections of Non-Alloy and Fine Grain Steels)
Steel Grade: S355J2H (Non-alloy structural steel; "S"=Structural steel, "355"=Minimum yield strength 355MPa, "J2"=Impact grade at -20℃, "H"=Hollow section)
Product Type: Cold-Formed Welded Hollow Section (Round Pipe)
Outer Diameter (OD): 245 mm
Wall Thickness (WT): 4.9 mm
Inner Diameter (ID): 235.2 mm
Theoretical Weight: 29.26 kg/m
Normal Length: 6m, 12m (standard)
Custom Length: 3m ~ 18m (available upon request)
Pipe End: Plain end / Beveled end (plain end as default; beveled end available for welding)
Dimensional Tolerance: - OD Tolerance: ±1% (minimum ±0.5 mm, maximum ±10 mm) - WT Tolerance: ±10% (since WT ≤ 5 mm) - Out-of-Roundness: ≤ 2%
Chemical Composition (Mass Fraction, %)
|
Element |
C (max) |
Mn (max) |
P (max) |
S (max) |
Si (max) |
N (max) |
|
S355J2H |
0.22 |
1.60 |
0.025 |
0.025 |
0.55 |
0.009 |
Carbon Equivalent (Ceq): ≤ 0.47 (for thickness ≤ 40 mm), calculated by the formula: C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15. Strictly controlled low P & S content ensures excellent low-temperature toughness and welding performance. Note: The product must contain sufficient nitrogen-binding elements (e.g., Al ≥ 0.020%).
Mechanical Properties (EN 10219 Standard Requirement)
|
Mechanical Property |
Minimum Required Value |
Typical Value |
|
Yield Strength (Rp0.2, ≤16mm) |
≥ 355 MPa |
360 – 410 MPa |
|
Tensile Strength (Rm) |
490 – 630 MPa |
530 – 650 MPa |
|
Elongation (A, ≥3mm) |
≥ 20% |
22 – 28% |
|
Impact Energy (-20℃, V-notch) |
≥ 27 J (average of 3 samples) |
32 – 45 J |
Note: Impact test is mandatory for S355J2H grade, requiring impact energy ≥27J at -20℃, making it ideal for low-temperature environments. All mechanical tests comply with EN ISO 6892-1 (tensile test) and EN ISO 148-1 (impact test).
Manufacturing Process
Pipe Type: Cold-Formed Welded Hollow Section (ERW / LSAW Welded Pipe)
Forming Process: Cold rolling forming + high-frequency resistance welding (ERW) or submerged arc welding (LSAW) + sizing + straightening
Heat Treatment: Hot rolled / Normalized (optional, to optimize low-temperature toughness and mechanical properties)
Process Features: High dimensional accuracy, uniform wall thickness, low ovality, smooth inner and outer surfaces, stable welding quality, and consistent performance, fully complying with EN 10219 standard requirements.
Product Advantages
Superior Low-Temperature Toughness: Mandatory impact test at -20℃ with ≥27J energy, preventing brittle fracture in cold environments.
Stable High Strength: S355J2H medium-high strength steel grade, minimum yield strength 355MPa, meeting heavy-load structural design requirements.
Excellent Weldability: Low carbon equivalent (≤0.47) and strict impurity control, ensuring reliable welding performance in various conditions.
Precise Specification: Strict dimensional tolerance control, consistent OD & WT, facilitating assembly and installation in structural projects.
Wide Applicability: Suitable for both normal and low-temperature environments, adaptable to diverse anti-corrosion treatments, compliant with European standards.
Application Fields
Building Structures: High-rise buildings, steel frames, bridge trusses, stadium structures, and cold-region construction.
Offshore & Marine Engineering: Offshore platforms, port structures, marine bridges, and coastal engineering facilities.
Mechanical Engineering: Crane equipment, mining machinery, heavy-duty truck frames, and low-temperature equipment supports.
Municipal & Energy: Wind turbine towers, power transmission towers, subway supports, and cold-region infrastructure.
Industrial Facilities: Low-temperature storage tanks, refrigeration equipment structures, and chemical engineering pipelines.
General Engineering: Piling pipes, structural columns, and heavy-duty engineering supports in cold climates.
Surface & Anti-Corrosion Treatment
Factory Surface: Black anti-rust paint / anti-rust oil (prevents oxidation during storage and transportation).
Optional Anti-Corrosion Coatings: - External Coating: 2PE/3PE, FBE powder, hot-dip galvanizing, epoxy coating. - Internal Coating: Epoxy resin, cement mortar lining (enhances corrosion resistance in harsh/low-temperature environments).
Inspection & Quality Assurance
Mandatory Inspection Items
Chemical composition analysis (per heat batch, complete traceable test records).
Tensile test (verifies yield/tensile strength & elongation, EN ISO 6892-1).
Impact test (V-notch, -20℃, ≥27J, EN ISO 148-1, critical for low-temperature performance).
100% Dimensional & visual inspection (OD, WT, surface defects, ovality, pipe-end flatness).
Weld quality inspection (visual & pressure test, ensures no leakage).
About us
Hebei Huayang Steel Pipe Co., Ltd. was founded in 2005, with a registered capital of 500 million yuan. The company covers an area of more than 1,000 mu, with annual sales of 10 billion yuan, more than 600 employees and an annual productivity of 2.75 million tons. The company has 17 new automatic steel pipe production lines and 14 high-frequency production lines, with a diameter of 73-660 mm; Three double-sided submerged arc welded steel pipe production lines with diameters of 406.4-1422.4mm;; 24 hot tube expanding production lines, with a diameter of 230-820mm; Two anticorrosion steel pipe production lines with a diameter of 73-1626 mm; 2 automatic painting production lines. With 3 branches and 5 offices, the products are sold to various cities and exported to more than 80 countries such as Southeast Asia, Middle East, Europe and America.
Packaging, transportation and delivery
Packaging, transportation and delivery
At Hebei Huayang Steel Pipe Co., Ltd., we apply standardized and reliable packaging solutions for all our steel pipe products. Our pipes can be securely packed by hexagonal bundling or circular bundling according to product diameter, wall thickness and customer requirements. Each pipe end is protected with high‑strength plastic pipe caps to avoid collision damage, dust and moisture during transportation and storage. The whole bundle is firmly wrapped with durable woven bags to enhance stability and prevent scratches or deformation.
We support a complete range of transportation methods to satisfy global customers, including road transportation, railway transportation, sea freight and container shipping. Based on our strategic location in Cangzhou, Hebei Province, we enjoy convenient access to major ports such as Tianjin Port, which greatly improves logistics efficiency and reduces transportation costs.
For standard specifications and normal order quantities, the general delivery time is about 30 days after order confirmation and deposit receipt. For large‑scale orders, special sizes or customized processing requirements, our production and sales team will formulate a detailed production plan and provide an accurate delivery schedule accordingly to ensure on‑time supply and stable performance for projects and clients worldwide.
Strict quality control
1. During and after the production, experienced quality inspectors randomly check the products to ensure that each steel pipe is qualified for production and application.
2. A nationally recognized laboratory with CNAS certification and certification by French Classification Society.
3. Have CNOOC access certificate, KOC oil company access network, ADNOC Abu Dhabi oil company access network, Petrobras access network, etc.
4. Accept the inspection by the third party designated/paid by the buyer, such as SGS and BV.
Certifications
API 2B
API 5L
GOST
ISO 9001
EN 10219
EN 10210
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