What is S235JR steel grade?
S235JR is a popular European standard (EN 10025-2) non-alloy structural steel known for its good weldability, formability, and cost-effectiveness, with 'S' for steel, '235' for its minimum yield strength (235 MPa), and 'JR' indicating a 27-joule impact energy test at room temperature (20°C). It's widely used in general construction, building frames, automotive parts, and machinery for its versatility, though it requires protective coatings as it's not inherently rust-resistant. Key equivalents include ASTM A36 and JIS SS400.
Key Characteristics
Yield Strength: Minimum 235 MPa (for thickness > 16mm).
Tensile Strength: 360-510 MPa.
Impact Test: 27 Joules at 20°C (JR).
Weldability: Excellent due to low carbon content, making it easy to weld.
Corrosion Resistance: Not inherently corrosion-resistant; needs painting or galvanizing for outdoor use.
Common Applications
Construction: Building frames, beams, columns, roof structures, scaffolding.
Mechanical Engineering: Machine parts, equipment components, trailers, excavators.
Automotive: Chassis, frames, safety structures.
Infrastructure: Bridges, transmission towers, offshore structures.
Equivalent Grades
ASTM: A36, A283 Grade C.
JIS: SS400.
DIN: ST37-2.
Why It's Popular
Versatility: Suitable for a broad range of structural and mechanical parts.
Affordability: Cost-effective compared to high-performance steels.
Processability: Good machinability and formability.
Full specification and details are available on request. The above information is provided for guidance purposes only. For specific design requirements please contact our technical sales staff.
