Description
S355JOW – Medium Tensile Weathering Steel
Table of Contents
- Introduction to S355JOW
- Chemical Composition
- Mechanical Properties
- Applications of S355JOW
- Comparison with Other Grades
- Corrosion Resistance
- Welding and Fabrication
- Conclusion
1. Introduction to S355JOW
S355JOW is a medium tensile, low carbon manganese weathering steel known for its excellent durability and weldability. This steel grade is designed to form a protective rust layer when exposed to atmospheric conditions, enhancing its corrosion resistance. Commonly supplied in an untreated or normalized condition, S355JOW is ideal for structural applications requiring both strength and toughness, making it a popular choice in various industries.
2. Chemical Composition
The specific chemical composition of S355JOW contributes to its unique properties. Typical elements include:
- Carbon (C): ≤ 0.20%
- Manganese (Mn): 1.00 – 1.50%
- Phosphorus (P): ≤ 0.045%
- Sulfur (S): ≤ 0.045%
- Copper (Cu): 0.25 – 0.55%
- Iron (Fe): Balance
This combination of elements allows S355JOW to develop a protective patina that guards against further corrosion while providing adequate strength for structural applications.
3. Mechanical Properties
S355JOW exhibits notable mechanical properties, making it suitable for various applications:
| Property | Value |
|---|---|
| Yield Strength (min) | 355 MPa |
| Tensile Strength | 480 – 620 MPa |
| Elongation (min) | 22% |
| Impact Energy (at -20°C) | 27 J (minimum) |
These characteristics ensure that S355JOW can withstand significant loads while maintaining structural integrity.
4. Applications of S355JOW
S355JOW is utilized across a wide range of applications due to its robust properties and aesthetic appeal. Typical uses include:
- Bridges: Ideal for the construction of bridges, where strength and durability are crucial.
- Rail Infrastructure: Commonly employed in rail applications for its resilience and long-lasting performance.
- Architectural Applications: Used in modern architecture to create visually striking and durable structures.
- Offshore Structures: Suitable for offshore applications, benefiting from its corrosion-resistant properties in harsh marine environments.
The versatility of S355JOW makes it a preferred choice in industries requiring reliable and long-lasting materials.
5. Comparison with Other Grades
When compared to other structural steel grades, S355JOW stands out for its combination of tensile strength and corrosion resistance. Here’s a brief comparison:
| Grade | Yield Strength | Corrosion Resistance | Typical Applications |
|---|---|---|---|
| S355JOW | 355 MPa | Excellent | Bridges, rail, offshore |
| S235JR | 235 MPa | Poor | General construction |
| S355J2 | 355 MPa | Moderate | Heavy-duty structures |
S355JOW is particularly advantageous for applications exposed to weathering conditions.
6. Corrosion Resistance
One of the key features of S355JOW is its excellent corrosion resistance. Upon exposure to the atmosphere, it develops a stable rust layer that acts as a barrier, preventing further corrosion. This unique characteristic makes S355JOW particularly suitable for outdoor applications, reducing the need for frequent maintenance and extending the lifespan of structures.
7. Welding and Fabrication
Welding S355JOW is straightforward due to its low carbon content. It can be welded using various techniques, including:
- MIG/MAG Welding
- TIG Welding
- Submerged Arc Welding
Proper preheating and post-weld treatments are recommended to prevent cracking and ensure strong weld joints. The material’s good weldability facilitates the construction of complex structures.
Supply Cities:
Mumbai Ahmedabad, Amaravathi, Ambattur, Bangalore, Belgaum, Chennai, Chittoor, Coimbatore, Dindigul, Mysore, Nellore, Hyderabad, Kochi, Mangalore, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Tamil Nadu, Telangana, Visakhapatnam, Kochi, Kerala, Hubli-Dharwad, Karnataka,
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