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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. -
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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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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.
swaziland EN 10210 S355J2H STEEL HOLLOW SECTION
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Product Description
Among the steel grades specified in the EN 10210 standard for hot-finished hollow structural sections (HSS), S355J2H is the most widely used due to its excellent combination of strength, toughness, and weldability. This grade is particularly favored in structural engineering for applications requiring high load-bearing capacity and durability. Below is a detailed description of S355J2H, including its chemical composition, mechanical properties, and typical applications.
Chemical Composition
The chemical composition of S355J2H is carefully controlled to ensure optimal mechanical properties and weldability. The key elements include:
Carbon (C): ≤ 0.22%
Manganese (Mn): ≤ 1.60%
Phosphorus (P): ≤ 0.035%
Sulfur (S): ≤ 0.035%
Silicon (Si): ≤ 0.55%
The low carbon content enhances weldability, while the manganese content contributes to strength and toughness. The low levels of phosphorus and sulfur minimize the risk of brittleness and improve overall durability.
Mechanical Properties
S355J2H is known for its high strength and excellent toughness, making it suitable for demanding structural applications. Its key mechanical properties include:
Yield Strength (ReH): ≥ 355 MPa
Tensile Strength (Rm): 470-630 MPa
Elongation (A): ≥ 22% (for thickness ≤ 16 mm)
Impact Toughness:
Charpy V-notch test at -20°C: ≥ 27 J
These properties ensure that S355J2H can withstand high loads and dynamic forces, even in low-temperature environments.
Key Features
High Strength-to-Weight Ratio:
S355J2H provides exceptional strength with relatively low weight, making it ideal for large-span structures and high-rise buildings.
Excellent Weldability:
The controlled chemical composition, particularly the low carbon content, ensures that S355J2H can be easily welded without compromising its mechanical properties.
Impact Toughness:
The grade performs well under dynamic loads and low temperatures, making it suitable for harsh environments such as offshore structures and cold regions.
Dimensional Accuracy:
EN 10210 specifies strict dimensional tolerances for S355J2H, ensuring high precision and consistency in the produced sections.
Surface Quality:
The standard requires a smooth surface finish, free from defects that could compromise structural integrity.
Applications
S355J2H is widely used in a variety of structural applications, including:
High-Rise Buildings:
Columns, beams, and frameworks requiring high strength and durability.
Bridges:
Large-span and heavy-duty bridge structures.
Offshore Structures:
Platforms, rigs, and other marine infrastructure.
Industrial Facilities:
Machinery frames, supports, and conveyor systems.
Stadiums and Arenas:
Roof trusses and large-span structural elements.
Comparison With Other EN 10210 Grades
| Property | S235JRH | S275J0H | S355J2H |
|---|---|---|---|
| Yield Strength (ReH) | ≥ 235 MPa | ≥ 275 MPa | ≥ 355 MPa |
| Tensile Strength (Rm) | 360-510 MPa | 410-560 MPa | 470-630 MPa |
| Elongation (A) | ≥ 26% (≤ 16 mm thickness) | ≥ 22% (≤ 16 mm thickness) | ≥ 22% (≤ 16 mm thickness) |
| Impact Toughness | ≥ 27 J at 20°C | ≥ 27 J at 0°C | ≥ 27 J at -20°C |
| Applications | Light-duty structures | Medium-duty structures | Heavy-duty structures |
Conclusion
S355J2H is the most commonly used steel grade in EN 10210 due to its superior strength, toughness, and weldability. It is the material of choice for heavy-duty structural applications, including high-rise buildings, bridges, and offshore structures. The strict quality control and precise manufacturing standards ensure that S355J2H hollow sections meet the highest performance requirements, making them a reliable and versatile option for modern structural engineering projects.
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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