Hebei Huayang Steel Pipe Co., Ltd is one of the most experienced manufacturers and suppliers of en 10219 245×4.9 s355j0h in China. Welcome to buy discount en 10219 245×4.9 s355j0h made in China here from our factory. Quality products and low price are available.
Product introduction
EN 10219 245×4.9 S355J0H 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 S355J0H steel grade, a non-alloy structural steel with excellent mechanical properties, good weldability and high dimensional accuracy. Featuring stable strength, reliable impact resistance and cost-effectiveness, it is widely used in building structures, bridge trusses, mechanical engineering, municipal facilities and other fields, perfectly meeting the requirements of medium-cold 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: S355J0H (Non-alloy structural steel; "S"=Structural steel, "355"=Minimum yield strength 355MPa, "J0"=Impact grade at 0℃, "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) |
|
S355J0H |
0.22 |
1.60 |
0.035 |
0.035 |
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. It ensures excellent welding performance and avoids welding cracks during on-site construction. 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) |
510 – 680 MPa |
530 – 650 MPa |
|
Elongation (A, ≥3mm) |
≥ 20% |
22 – 28% |
|
Impact Energy (0℃, V-notch) |
≥ 27 J (average of 3 samples) |
30 – 40 J |
Note: Impact test is mandatory for S355J0H grade, requiring impact energy ≥27J at 0℃, which makes it suitable for medium-cold working conditions. 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 improve 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
Stable Strength: S355J0H medium-high strength steel grade, with minimum yield strength of 355MPa, fully meeting the design requirements of heavy-load structural systems.
Excellent Impact Resistance: Mandatory impact test at 0℃, impact energy ≥27J, suitable for medium-cold working environments.
Superior Weldability: Low carbon equivalent (≤0.47), compatible with on-site manual welding, automatic welding and semi-automatic welding, reducing construction difficulty and ensuring welding quality.
Precise Specification: Strict dimensional tolerance control, consistent outer diameter and wall thickness, convenient for assembly and installation in structural projects.
Strong Versatility: Widely applicable to various structural and engineering fields, adaptable to different anti-corrosion treatments, and compliant with European standard systems for global export.
Application Fields
Building Structures: High-rise building supports, bridge trusses, steel frames, and roof structures.
Mechanical Engineering: Crane equipment, truss structures, and mechanical supports.
Municipal Facilities: Subway supports, pedestrian overpasses, lighthouse foundations, and urban greening structures.
Port & Dock Structures: Steel piles, dam supports, and port loading and unloading equipment frames.
Energy Field: Wind power tower supports, pipeline brackets, and overhead power transmission structures.
General Engineering: Piling pipes, auxiliary structural pipes, and industrial equipment frames.
Surface & Anti-Corrosion Treatment
Factory Surface: Black anti-rust paint / anti-rust oil (to prevent oxidation during storage and transportation, ensuring surface integrity).
Optional Anti-Corrosion Coatings: - External Coating: 2PE/3PE anti-corrosion coating, FBE (Fusion Bonded Epoxy) powder coating, galvanizing (hot-dip galvanizing / electro-galvanizing). - Internal Coating: Epoxy resin coating, cement mortar lining (to improve corrosion resistance and service life in harsh environments).
Inspection & Quality Assurance
Mandatory Inspection Items
Chemical composition analysis (per heat batch, with complete test records and traceability).
Tensile test (to verify yield strength, tensile strength and elongation, complying with EN ISO 6892-1).
Impact test (V-notch, 0℃, average impact energy ≥27J, complying with EN ISO 148-1).
100% Dimensional and visual inspection (checking outer diameter, wall thickness, surface defects, pipe end flatness and out-of-roundness).
Weld quality inspection (visual inspection and pressure test to ensure no leakage).
Optional Inspection Items
Non-Destructive Testing (NDT): Ultrasonic Testing (UT) / Eddy Current Testing (ET) / Radiographic Testing (RT), complying with EN 10246 series standards.
Mechanical Performance Tests: Flattening test, flaring test, bending test.
Coating thickness test (for products with anti-corrosion coating).
Packing & Delivery
Packing: Bundled with steel strips, 3-6 pieces per bundle (single piece for large-caliber pipes); seaworthy packaging, suitable for ocean transportation and long-distance shipping.
Marking: Clearly printed on the pipe surface with EN 10219, steel grade (S355J0H), specification (245×4.9), heat number, batch number and manufacturer information.
Delivery Condition: Hot rolled / normalized + anti-rust treatment, clean inner and outer surfaces, free of defects such as cracks and burrs.
Documentation: Provide complete inspection certificates complying with EN 10204 3.1 or 3.2 standard, supporting customs clearance and quality inspection in European and global markets.
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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