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Description
Overview of EN10025-2 S355JR Carbon and Low-Alloy High-Strength Steel Plate
EN10025-2 S355JR is a European standard structural steel grade known for its high strength and versatility in various applications, particularly in construction and engineering. The “S” indicates it is a structural steel, while “355” refers to its minimum yield strength in megapascals (MPa).
Chemical Composition and Mechanical Properties of S355JR Steel
Chemical Composition:
| Element | Percentage |
|---|---|
| Carbon (C) | ≤0.24% |
| Manganese (Mn) | 1.60% max |
| Phosphorus (P) | ≤0.035% |
| Sulfur (S) | ≤0.035% |
| Silicon (Si) | 0.55% max |
| Copper (Cu) | 0.20% min (if specified) |
Mechanical Properties:
| Property | Value |
|---|---|
| Yield Strength (min) | 355 MPa (51 ksi) |
| Tensile Strength | 470 – 630 MPa (68 – 91 ksi) |
| Elongation in 8″ (min) | 20% |
Applications and Industries Utilizing S355JR Steel Plates
S355JR steel is widely used across various industries due to its excellent mechanical properties and versatility:
- Construction: Used for building structures, bridges, and other infrastructure projects.
- Heavy Machinery: Components in heavy machinery and equipment.
- Transport Engineering: Frames and structural parts for vehicles and transport systems.
- Power Engineering: Applications in power generation facilities.
- Bridge Building: Structural elements in bridge construction.
Corrosion Resistance and Performance Characteristics of S355JR
- Corrosion Resistance: Moderate corrosion resistance; protective coatings may be applied to enhance performance in harsh environments.
- Performance Characteristics: Known for good toughness, ductility, and weldability, making it suitable for various structural applications.
Manufacturing Processes for S355JR Steel Plates and Coils
S355JR steel plates are typically manufactured through the following processes:
- Hot Rolling: The steel is rolled at high temperatures to achieve desired thicknesses.
- Cold Rolling: Further processing may be done to improve surface finish.
Available Dimensions:
| Thickness Range | Width Range | Length Range |
|---|---|---|
| 5 mm – 150 mm | Up to 2500 mm | Up to 12000 mm |
Welding and Fabrication Considerations for S355JR Steel
- Weldability: Excellent weldability; can be welded using various methods without preheating, although preheating may improve results for thicker sections.
- Post-Weld Treatment: Generally not required but can enhance mechanical properties depending on application requirements.
Comparison of S355JR with Other Structural Steel Grades
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Typical Applications |
|---|---|---|---|
| S355JR | ≥355 | 470 – 630 | Construction, heavy machinery |
| S275 | ≥275 | 410 – 560 | General structural applications |
| A36 | ≥250 | 400 – 550 | General construction applications |
At HL Steel Company, we provide high-quality EN10025-2 S355JR carbon and low-alloy high-strength steel plates tailored for various industrial applications, ensuring optimal performance and reliability in demanding environments.
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