S420J0W Structural Steel Plate for Bridges & Construction
Engineered for critical infrastructure, the S420J0W structural steel plate combines high mechanical performance with superior resistance to atmospheric corrosion, making it a trusted choice for bridges, buildings, and heavy-duty construction projects. Compliant with EN 10025-5, this grade balances strength, durability, and ease of fabrication.
Key Features
High Strength & Load-Bearing Capacity: With a minimum yield strength of 420 MPa and tensile strength ranging 500–680 MPa, it withstands heavy static and dynamic loads in bridge girders, building frameworks, and tower structures.
Natural Weather Resistance: Alloyed with copper, phosphorus, chromium, and nickel, the steel forms a dense, protective patina that inhibits rust progression, reducing reliance on paint and lowering long-term maintenance costs in outdoor environments.
Cold-Weather Reliability: The "J0" designation ensures passing Charpy impact tests at 0°C (≥27J), making it suitable for regions with moderate cold climates where structural toughness is critical.
Fabrication-Friendly: Compatible with standard welding, cutting, and machining techniques, it integrates seamlessly into construction workflows, minimizing production delays and costs.
Applications
Bridges: Ideal for main girders, support beams, and pedestrian walkways exposed to moisture, traffic loads, and varying temperatures.
Commercial & Industrial Construction: Used in warehouse frameworks, multi-story buildings, and industrial sheds requiring robust, corrosion-resistant steel.
Infrastructure Projects: Tower structures (e.g., power transmission, communication masts), railway bridges, and port facilities exposed to harsh coastal or industrial atmospheres.
Technical Specifications
Standard: EN 10025-5:2004
Yield Strength (ReH): ≥420 MPa (for thickness ≤16mm)
Tensile Strength (Rm): 500–680 MPa
Elongation (A5): ≥18%
Impact Test: 0°C, ≥27J (Charpy V-notch, J0 class)
Chemical Composition (max, unless noted):
C: 0.12%, Si: 0.55%, Mn: 1.50%, P: 0.035%, S: 0.035%
Alloying Elements: Cu 0.20–0.55%, Cr 0.30–1.25%, Ni ≤0.65% (optional)
Available in thicknesses from 3mm to 100mm and customizable dimensions, our S420J0W plates undergo strict quality control to ensure compliance with mechanical and chemical requirements. Contact us for project-specific specifications, certifications, or bulk orders.
FAQ
Q1: What is the main use of S420J0W steel plate?
A1: Primarily for bridges, construction structures, and heavy-duty outdoor frameworks needing strength and weather resistance.
Q2: Does it require anti-rust coating?
A2: No-its alloy composition forms a protective patina, reducing the need for frequent painting.
Q3: What's the yield strength of S420J0W?
A3: Minimum 420 MPa, suitable for load-bearing applications like bridge girders.
Q4: Can it be used in cold climates?
A4: Yes-it passes impact tests at 0°C (J0), ensuring toughness in moderate cold conditions.
Q5: Is welding easy with this steel?
A5: Yes, it's weldable using standard methods for structural steel, ideal for construction projects.
