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EN 10025-2 S355JR Hot Rolled Mild Carbon Structural Steel Plate
EN 10025-2 S355JR is a high-strength, non-alloy hot-rolled structural steel widely utilized across European and international construction and engineering sectors. As a low-carbon manganese steel, S355JR is designated by its minimum yield strength of 355 MPa. The material offers an optimal balance of ductility, excellent weldability, and processing stability.
Strictly complying with the EN 10025-2 standard, the "JR" suffix indicates that the steel must achieve an impact energy value of 27 Joules at an ambient temperature of 20°C. This characteristic makes it the preferred material for load-bearing structures in non-extreme low-temperature environments.
Production Specifications
Specification
Details
Thickness
6 mm-300 mm (common: 6-100 mm)
Width
1500 mm-4000 mm (common: 2000 mm, 2500 mm)
Length
6000 mm-18000 mm (customizable)
Condition
Hot-rolled, Normalized
Certifications
EN 10025-2, EN 10204 3.1/3.2, CE Marking
Additional Testing
Ultrasonic Testing (UT), Charpy V-notch Impact Test at +20°C, HIC (optional)
Surface Finish
Natural, Painted, Shot-blasted
Production Capacity
Up to 5000 tons/month
Customization
Cut-to-size, Beveling, Cladding (optional)
Chemical Composition
Element
Composition (% by weight)
Carbon (C)
0.24 max
Manganese (Mn)
1.60 max
Phosphorus (P)
0.035 max
Sulfur (S)
0.035 max
Silicon (Si)
0.55 max
Copper (Cu)
0.55 max
Nitrogen (N)
0.012 max
Iron (Fe)
Balance
Mechanical Properties
Property
Value
Yield Strength (min)
355 MPa
Tensile Strength
470-630 MPa
Elongation (min, 200 mm)
20%
Impact Toughness (Charpy V-notch)
27 J at +20°C
Hardness (HB, typical)
150-200 HB
Key Benefits
High Strength-to-Weight Ratio: With a yield strength of 355 MPa, it enables lighter structures without sacrificing load-bearing capacity, reducing material costs in bridges and high-rise buildings.
Good Toughness: Tested at +20°C with 27 J impact energy, S355JR performs reliably in standard environments, suitable for general structural use.
Excellent Weldability: Low carbon equivalent (CEV ≈ 0.45) allows welding without preheating in many cases, facilitating efficient fabrication for large structures.
Atmospheric Corrosion Resistance: Additions of silicon and copper provide better resistance to weathering, making it suitable for outdoor applications like offshore platforms.
Cost-Effectiveness: Offers higher strength than S275J2 or S235J2 steel, allowing for material savings while maintaining performance.
Compliance and Certification: Meets DIN EN 10025-2 and BS EN 10025-2 material grade requirements, with CE marking and EN 10204 3.1/3.2 certificates available.
Weldability and Fabrication
S355JR exhibits excellent weldability due to its low carbon equivalent, compatible with standard processes like SMAW, GTAW, and SAW. Key considerations:
Preheat: Minimal or no preheating required for plates up to 25 mm, reducing fabrication time.
Post-Weld Heat Treatment (PWHT): Not typically needed, but recommended for thicker plates (>40 mm) to relieve stresses.
Filler Materials: Use low-alloy fillers matching the strength of S355JR, such as E7018 or ER70S-6.
Fabrication: High ductility (20% elongation) supports bending, rolling, and forming for complex structural components.
GNEE supplies S355JR in normalized conditions, enhancing grain refinement for improved fabrication performance.
Application Fields
S355JR's high load-bearing capacity makes it an indispensable component in engineering projects:
Building Structures: Columns for high-rise buildings, industrial plant frames, and roof trusses.
Infrastructure: Support components for highway bridges, railway bridges, and pedestrian walkways.
Heavy Machinery: Chassis for excavators and loaders, crane booms, and mining crusher supports.
Energy Equipment: Transmission towers, wind turbine tower foundation components, and pressure vessel supports.
Surface Treatment & Logistics
Surface Treatment: We offer sandblasting (Sa2.5 standard) and shop primer coating to effectively prevent oxidation and corrosion during transit and storage.
Custom Cutting: Equipped with CNC laser, plasma, and flame cutting machines, maintaining tolerances within ±1.0mm.
Quality Traceability: Every batch is accompanied by an EN 10204 3.1 Mill Test Certificate (MTC), with unique Heat Number hard stamping on each plate.
Logistics: Standard export packaging is utilized. For sea freight, anti-rust oil coatings and waterproof woven bags are applied to ensure a pitting-free surface upon delivery.
Frequently Asked Questions
What is the ASTM equivalent of EN 10025-2 S355JR?
The closest ASTM equivalent to EN 10025-2 S355JR is ASTM A572 Grade 50, which has a similar minimum yield strength of 345-355 MPa and tensile strength of 450-620 MPa. It is widely used for structural applications like bridges and buildings, with comparable weldability. However, S355JR has stricter impact toughness requirements at +20°C.
What is the difference between EN 10025-2 S355JR and S355J2?
EN 10025-2 S355JR is tested for impact toughness at +20°C (27 J), suitable for general structural use in mild conditions. S355J2 requires testing at -20°C, making it better for cold environments. Both have the same yield strength (355 MPa), but S355J2 offers superior low-temperature performance for offshore or arctic applications.
What is EN 10025-2 S355JR used for?
EN 10025-2 S355JR is used for general structural purposes, including buildings, bridges, cranes, and machinery frames. Its high strength-to-weight ratio makes it ideal for load-bearing components where moderate toughness is sufficient, such as in non-seismic construction.
What is the naming convention for EN 10025-2 grades like S355JR?
The naming in EN 10025-2 indicates the minimum yield strength (e.g., S355 = 355 MPa at 16 mm thickness), followed by JR (impact at +20°C) or J0/J2 (at 0°C or -20°C). "S" stands for structural steel, and the number represents the yield strength in MPa. This convention helps select grades based on required toughness and strength.
Is EN 10025-2 S355JR the same as ASTM A36?
No, EN 10025-2 S355JR is not the same as ASTM A36. S355JR has a higher yield strength (355 MPa vs. 250 MPa for A36) and better impact properties, making it suitable for higher-load applications. A36 is a milder steel for general use, while S355JR is a high-strength low-alloy (HSLA) grade.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Trading Company
Year Established:
2008
Total Annual:
3000000-3500000
Employee Number:
100~200
Ecer Certification：
Verified Supplier
Gnee Steel Co.,Ltd (GNEE) is the affiliated company for ANGANG GROUP who are one large state-owned iron and steel group located in Henan, China.
GNEE are specialized in manufacturing and supplying large quantities Seamless steel pipes and Shipping-building plates, We are provide high quality steel ... Gnee Steel Co.,Ltd (GNEE) is the affiliated company for ANGANG GROUP who are one large state-owned iron and steel group located in Henan, China.
GNEE are specialized in manufacturing and supplying large quantities Seamless steel pipes and Shipping-building plates, We are provide high quality steel ...
