EN 10025 S355JR steel is a widely used non-alloy structural steel grade with a minimum yield strength of 355 MPa, designed for load-bearing structures and general fabrication.
The designation JR confirms that the steel has passed a Charpy V-Notch impact test of 27 Joules at +20°C, ensuring reliable toughness under normal ambient conditions.
EN 10025 S355JR steel
As a professional structural steel manufacturer and exporter, GNEE steel supplies high-quality EN 10025 S355JR steel plates for global construction, bridge engineering, cranes, heavy machinery, and infrastructure projects. All materials are produced under strict quality control and supplied with EN 10204 3.1 mill test certificates.
EN 10025 S355JR Steel Chemical Composition (Max %)
The chemical composition of EN 10025 S355JR steel is optimized to balance strength, weldability, and impact resistance. Controlled levels of carbon and impurities ensure good fabrication performance.
Chemical Composition Table (Max %)
| Grade | C | Si | Mn | P | S | N | Cu |
|---|---|---|---|---|---|---|---|
| S355JR | 0.270 | 0.600 | 1.700 | 0.045 | 0.045 | 0.014 | 0.060 |
EN 10025 S355JR Yield Strength by Thickness
The yield strength of EN 10025 S355JR steel decreases as plate thickness increases, which is a standard behavior for structural steels.
Yield Strength Reduction Table
| Thickness (t) | Minimum Yield Strength (MPa) |
|---|---|
| t ≤ 16 mm | 355 |
| 16 mm < t ≤ 40 mm | 345 |
| 40 mm < t ≤ 63 mm | 335 |
| 63 mm < t ≤ 80 mm | 325 |
| 80 mm < t ≤ 100 mm | 315 |
| 100 mm < t ≤ 150 mm | 295 |
EN 10025 S355JR Tensile Strength Properties
The ultimate tensile strength of EN 10025 S355JR steel also varies depending on plate thickness, offering flexibility for different structural loads.
Tensile Strength by Thickness
| Thickness (t) | Tensile Strength (MPa) |
|---|---|
| t ≤ 3 mm | 510 – 680 |
| 3 mm < t ≤ 100 mm | 470 – 630 |
| 100 mm < t ≤ 150 mm | 450 – 600 |
EN 10025 S355JR Steel Density and Physical Properties
The density of EN 10025 S355JR steel is:
7850 kg/m³
This density value is commonly used for:
Structural weight calculations
Load estimation
Transportation and installation planning
Delivery Condition and Fabrication of EN 10025 S355JR Steel
EN 10025 S355JR steel is commonly supplied in:
As-rolled (+AR) condition
Normalized or normalized rolled (+N) condition
Fabrication Characteristics
S355JR steel can be:
Welded using standard welding processes
Bolted and riveted without difficulty
Cut and machined using conventional methods
However, S355JR steel is mainly intended for structural work where no heavy forming or extreme bending is required.
Typical Applications of EN 10025 S355JR Steel
Thanks to its balanced mechanical properties, EN 10025 S355JR steel is widely used in:
- Bridges and highway structures
- Cranes and lifting equipment
- Steel frames and industrial buildings
- General structural fabrication
- Heavy machinery components
Why Choose GNEE for EN 10025 S355JR Steel Plates?
As an experienced EN 10025 structural steel supplier, GNEE offers:
- Stable production and large stock availability
- Full EN 10204 3.1 certification
- Optional ultrasonic testing (UT)
- Support for SGS / BV / TUV third-party inspection
- Export-grade packaging for sea freight
EN 10025 S355JR steel is a reliable structural steel grade offering high yield strength, good weldability, stable impact resistance, and proven performance across a wide range of thicknesses.
With its 355 MPa minimum yield strength, verified Charpy impact performance at 20°C, and versatility in fabrication, S355JR remains a preferred choice for modern structural projects.
What is S355JR equivalent to?
S355JR equivalent grades have very close chemical composition and mechanical properties to that of S355JR steel. Both the S355JR equivalent grades Q345B, A572 Gr 50, ST52-3, SM490B and S355JR steel are main products of Gnee steel.
What is the difference between S275JR and S355JR?
S275JR: Offers a minimum yield strength of 275 MPa for thicknesses up to 16 mm. This makes it suitable for applications where moderate strength is sufficient. S355JR: Provides a higher minimum yield strength of 355 MPa for thicknesses up to 16 mm, making it ideal for projects requiring greater load-bearing capacity.
What is S355JR steel?
355JR is a grade of low-carbon steel commonly used in structural applications. It is part of the 'S' family of steels, which includes S235, S275, and S355 grades. The "JR" designation means that the material has been subjected to a Charpy V-notch impact test at 208℃ and has a minimum impact strength of 27 Joules.