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basic information
EN10210 S355JR is a low-alloy, high-strength structural steel designed for a wide range of engineering applications. It is widely used in construction and engineering applications due to its excellent mechanical properties, weldability, and durability. The "S" denotes structural steel, "355" indicates the minimum yield strength in MPa, and "JR" refers to its impact toughness at room temperature (27 Joules at 20°C).
EN 10210 S355JR Hollow Section
Standard: EN 10210
Grade: S355JR,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)
The Wall Thickness Tolerance: ±5%
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
|
Chemical Composition |
Properties |
|
Carbon (C): ≤0.24% |
Contributes to strength but is limited to maintain weldability. |
| Silicon (Si): ≤0.55% | Improves strength and deoxidation during steelmaking. |
| Manganese (Mn): ≤1.60% | Enhances strength and toughness. |
| Phosphorus (P): ≤0.045% | Kept low to avoid brittleness. |
| Sulfur (S): ≤0.045% | Controlled to minimize hot cracking during welding. |
| Nitrogen (N): ≤0.009% |
Other trace elements: Small amounts of aluminum (Al), nitrogen (N), and others may be present to refine the grain structure and improve properties.
Mechanical Properties
Mechanical Properties |
Characteristics |
| Yield Strength (ReH): ≥ 355 MPa | The minimum stress at which the steel begins to deform plastically. |
| Tensile Strength (Rm): 470–630 MPa | The maximum stress the steel can withstand before breaking. |
| Elongation at Break (A): ≥ 22% (for thickness ≤ 16 mm) | Indicates ductility and ability to deform without fracturing. |
| Impact Toughness (KV): ≥ 27 J at 20°C | Ensures resistance to brittle fracture at room temperature. |
Key Properties
Weldability: Excellent due to controlled carbon content and low levels of impurities like sulfur and phosphorus.
Formability: Good, allowing it to be easily shaped and fabricated.
Durability: High resistance to wear and fatigue, making it suitable for long-term use.
Corrosion Resistance: Moderate; may require protective coatings in corrosive environments.
Advantages
- High Strength and Toughness: The combination of high yield strength and good elongation ensures that the material can handle heavy loads and resist deformation.
- Excellent Weldability: Due to its low carbon content, S355JR is easy to weld without requiring preheating or post-weld heat treatment.
- Good Formability: It can be easily processed through cutting, bending, and forming operations.
- Cost-Effective: S355JR provides a high strength-to-weight ratio, reducing material costs and improving overall project economics.
- Versatility: Suitable for a wide range of applications, from structural components to mechanical parts.
Common Applications
S355JR Steel Hollow Section is widely used in structural and engineering applications, including:
Building Construction: Beams, columns, and frameworks.
Bridges: Structural components requiring high strength and durability.
Heavy Machinery: Frames and supports.
Industrial Equipment: Storage tanks, cranes, and conveyor systems.
Infrastructure: Towers, pylons, and railway structures.
In summary, EN10210 S355JR is a highly versatile and cost-effective material that combines excellent mechanical properties with ease of processing and welding. Its wide range of applications makes it a preferred choice in many engineering and construction projects.
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