S355JR is a high-strength, low-alloy steel grade commonly used in structural applications requiring superior yield and tensile strength. This steel grade is ideal for applications in the construction of bridges, buildings, and other infrastructure that require riveted, bolted, or welded assemblies. With a higher yield strength compared to S235JR and S275JR, S355JR offers enhanced performance in terms of load-bearing capacity and structural integrity.
This steel grade is part of the EN 10025-2 standard, making it widely used across a variety of industries, including civil engineering, manufacturing, and transportation. S355JR provides an excellent balance between strength and formability, allowing for easy fabrication and welding, making it a popular choice for heavy-duty structural components.
Key Features and Benefits of S355JR Steel
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Higher Strength: S355JR offers greater yield and tensile strength compared to S235JR and S275JR, making it a reliable choice for more demanding construction projects.
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Wide Application: This steel grade is used in the construction of bridges, buildings, and other critical infrastructure components that require high durability.
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Versatility: S355JR is suitable for a range of processing methods, including hot rolling, control rolling, and normalizing for thicker steel plates.
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Weldability: Excellent weldability ensures that S355JR can be easily joined with other materials using standard welding processes.
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Impact Toughness: When needed, S355JR can be supplied with enhanced low-temperature impact testing, making it suitable for cold weather applications.
Technical Specifications for S355JR Steel Plate
Chemical Composition (Maximum Percentage by Weight)
The following represents the chemical composition of S355JR steel, ensuring it meets the necessary strength and durability standards:
| Element | S355JR Steel |
|---|---|
| Carbon (C) | 0.270% |
| Silicon (Si) | 0.600% |
| Manganese (Mn) | 1.700% |
| Phosphorus (P) | 0.045% |
| Sulfur (S) | 0.045% |
| Nitrogen (N) | 0.014% |
| Copper (Cu) | 0.060% |
This composition ensures that S355JR steel exhibits a robust structure, high durability, and excellent corrosion resistance, making it ideal for various construction and engineering projects.
Mechanical Properties of S355JR Steel Plate
The following are the key mechanical properties of S355JR steel, which determine its strength, flexibility, and performance under stress.
| Grade | Thickness Range | Min Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Min Impact Energy (J) |
|---|---|---|---|---|---|
| S355JR | 8mm – 100mm | 315 MPa – 355 MPa | 450 MPa – 630 MPa | 18-20% | 27J |
| S355JR | 101mm – 200mm | 285 MPa – 295 MPa | 450 MPa – 600 MPa | 18% | 27J |
| S355JR | 201mm – 400mm | 275 MPa | – | 17% | 27J |
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Yield Strength: 315-355 MPa, providing the steel with the strength to withstand heavy loads and high stress without permanent deformation.
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Tensile Strength: 450-630 MPa, allowing S355JR to handle high tensile forces without failure.
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Elongation: 18-20%, ensuring flexibility and resistance to breaking under strain.
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Impact Toughness: With a minimum impact energy of 27J, S355JR ensures durability and resilience in cold and demanding environments.
S355JR Steel Plate Grades and Alternatives
S355JR is available in a range of grades and variants to meet specific project requirements. Some of the common grades available include:
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S235JR
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S235J0
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S235J2
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S275JR
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S275J0
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S275J2
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S355J0
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S355J2
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S355K2
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S450J0
For projects requiring additional low-temperature impact testing, grades like S355J0 and S355J2 offer superior impact resistance, with S355J0 tested at 0°C and S355J2 tested at -20°C.
Applications of S355JR Steel Plate
S355JR steel is highly versatile and is widely used in industries where high-strength steel is required for structural integrity. Some common applications include:
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Bridge Construction: Ideal for supporting the structural load and ensuring safety in bridge projects.
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Building Construction: Used for constructing frameworks, supports, and beams in commercial and residential buildings.
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Heavy Machinery: The steel’s high tensile strength makes it suitable for manufacturing heavy machinery components.
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Shipbuilding: Suitable for offshore and marine applications where steel needs to withstand harsh environments.
S355JR Steel Plate Processing
S355JR steel plates can be processed in various ways to meet specific project requirements. Common processing methods include:
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Hot Rolling: The most common method used for standard S355JR plates.
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Control Rolling: Offers better mechanical properties than conventional hot-rolled products, particularly for thicker plates.
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Normalizing: For super-thick steel plates, normalization can be applied to improve the mechanical properties, ensuring the material meets customer requirements.
S355JR Stock Availability
At Gangsteel, we maintain a large stock of S355JR steel plates in various sizes and thicknesses, including grades such as S355J0, S355J2, and S355K2. Whether you need standard sizes or custom-cut plates, we can fulfill your requirements. We also offer competitive pricing and fast delivery across multiple regions.
Why Choose Gangsteel for Your S355JR Steel Needs?
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Wide Selection: We offer a variety of grades and sizes of S355JR steel plates to meet the specific needs of your project.
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Quality Assurance: Our S355JR steel meets the EN10025-2 standard, ensuring it adheres to rigorous quality and performance standards.
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Competitive Pricing: With years of industry experience, we provide cost-effective solutions without compromising on quality.
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Reliable Delivery: We offer fast and efficient delivery, ensuring that your materials arrive on time and within budget.
For a detailed quote or to learn more about S355JR steel plates and their applications, contact us today。
