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About us
Tianjin lefin Industrial
TIANJIN LEFIN STEEL GROUP containing Tianjin lefin Industrial Co.,Ltd. 、Tianjin lefin steel import & export Co.,Ltd and Tianjin Shengqifeng International Trading Co., Ltd. -
Products
Steel Pipe Processing
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard -
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Service Capability
Guarantee Quality
Our steel pipes are suitable for oil, natural gas, shipbuilding, chemical industry, water conservancy, electrical, steel structure, construction and other related fields.
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard
Has rich experience in steel pipe processing, can be customized according to customer requirements according to the drawing and sample processing, assist in the development of new products.
PRODUCTS CENTER
Papua New Guinea EN 10210 S355J2H TUBE
Category:
Product Description
Basic Information
The steel grade S355J2H is one of the most commonly used grades in the EN 10210 standard, which specifies the technical delivery conditions for hot-finished structural hollow sections of non-alloy and fine-grain steels. S355J2H is widely utilized in construction and engineering due to its excellent mechanical properties, weldability, and versatility.
EN 10210 S355J2H TUBE
Standard: EN 10210
Grade: S235JRH, S275J0H, S275J2H, S355J0H, S355J2H, S275NH, S355NH
Outside Diameter:
1/2 INCH - 24 INCH(CHS)
20MM × 20MM - 1200MM × 1200MM(SHS)
20MM × 30MM - 1000MM × 1500MM(RHS)
Wall Thickness:
1.3MM - 22MM(CHS)
1.3MM - 50MM(SHS,RHS)
Length: Commonly used 5.8M, 6M, 12M, but we can also produces depends on client's requirement.
Common Process:
ERW: 20MM - 660MM (OD) Wall Thickness: 1.3MM - 50MM
LSAW:406MM - 1420MM (OD) Wall Thickness: 10MM - 50MM
SSAW: 219MM - 4084MM (OD) Wall Thickness: 7.75MM - 25.4MM
Coating: Black paint, Varnish, Anti-rust oil.
Applications: Agricultural equipment, Architectural structures, Construction frameworks for bridges and buildings,
Mechanical equipment, Transportation construction.
Chemical Composition
| Composition, max, % | |
| EN 10210 S355J2H | |
| Carbon (C) | 0.22 |
| Manganese (Mn) | 1.6 |
| Silicon (Si) | 0.55 |
| Phosphorus (P) | 0.035 |
| Sulfur (S) | 0.035 |
| Aluminum (Al) | 0.02 |
Carbon (C),Enhances strength but reduces ductility and weldability if too high.
Manganese (Mn),Improves strength and toughness, and aids in deoxidation during steelmaking.
Silicon (Si),Increases strength and improves resistance to oxidation and scaling.
Phosphorus (P),Impurity; kept low to avoid brittleness.
Sulfur (S),Impurity; kept low to improve weldability and toughness.
Aluminum (Al),Grain refiner; improves toughness and controls grain size.
The fine-grain structure achieved through controlled aluminum content ensures better toughness and mechanical performance.
Mechanical Properties
| Mechanical properties | |
| EN 10210 S355J2H | |
| Yield Strength (ReH),min | 355 MPa |
| Tensile Strength (Rm) | 470-630 MPa |
| Elongation (A),min | 22.00% (for thickness ≤ 16 mm) |
Yield Strength (ReH), PA Indicates the stress at which the material begins to deform plastically.
Tensile Strength (Rm), Measures the maximum stress the material can withstand before breaking.
Elongation (A), Reflects ductility and ability to deform without fracturing.
Impact Energy (KV), ≥ 27 J at -20°C,Demonstrates toughness, especially at low temperatures.
The combination of high strength, good ductility, and excellent toughness makes S355J2H ideal for structural applications.
Advantages
High Strength-to-Weight Ratio: Provides excellent load-bearing capacity while minimizing weight.
Good Weldability: Can be easily welded using common methods without pre- or post-weld heat treatment.
Toughness at Low Temperatures: Suitable for use in cold climates or low-temperature environments.
Durability: Resists fatigue and dynamic loads, making it ideal for long-term structural applications.
Cost-Effective: Balances performance and cost, making it a preferred choice for many projects.
Applications
Structural Engineering: For beams, columns, and frames in buildings.
Bridge Construction: For structural supports and beams.
Machinery and Vehicle Manufacturing: For manufacturing parts and structural components.
Steel Structure Construction: For various components in steel structures.
Retaining Walls and Caissons: For underground engineering structures.
In summary, S355J2H is a versatile and reliable steel grade in the EN 10210 standard, offering an optimal combination of chemical composition, mechanical properties, and performance for a wide range of structural applications. Its widespread use is a testament to its quality and adaptability in the construction and engineering industries.
Address: Hengtai Road,Daqiuzhuang Town,Jinghai County,Tianjin,China
Mob: +8615122229899(whatspp)
Phone: +86 22 58171905
Fax: +86 22 58171902
E-mail:info@lefinsteel.com
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