S275J0 is a European standard (EN 10025-2) non-alloy structural steel known for its good weldability, strength (minimum 275 MPa yield), and impact toughness down to 0°C, indicated by the "J0". It's a versatile hot-rolled material used in construction, bridges, machinery, and general engineering, offering a balance of performance and fabrication ease, often supplied normalized for construction applications.
Key Characteristics
Standard: EN 10025-2 (European standard).
Type: Non-alloy structural steel.
Strength: Minimum yield strength of 275 MPa (megapascals).
Impact Test: Requires a Charpy impact test of at least 27 Joules at 0°C (zero degrees Celsius).
Weldability: Readily weldable, making it suitable for various construction needs.
Applications: Buildings, bridges, general construction, engineering machinery (excavators, cranes), and other structural components.
Designations
S: Structural Steel.
275: Minimum Yield Strength (MPa).
J0: Impact test at 0°C.
Common Forms & Conditions
Supplied as plates, sheets, sections, bars, and rods.
Often delivered in the normalized or untreated condition for construction, but can also be quenched and tempered.
S275J0 is primarily used in structural applications where components are exposed to cool or seasonally cold temperatures, requiring guaranteed impact toughness at 0°C to prevent brittle fracture. Its combination of moderate strength (275 MPa yield) and certified low-temperature toughness makes it a reliable choice for specific environments.
Typical Applications Include:
Cold-Climate Infrastructure: Bridges, pedestrian walkways, transmission towers, and lighting masts in regions where temperatures regularly approach or reach freezing (0°C).
Building & Construction: Structural frames, columns, and roof trusses for unheated warehouses, industrial halls, agricultural buildings, and multi-story structures in temperate climate zones.
Heavy Machinery & Equipment: Chassis, frames, and supporting components for construction, mining, or agricultural machinery operating in cold outdoor conditions.
Transportation & Storage: Components for truck trailers, rail cars, and storage tanks that may be subjected to low ambient temperatures.
General Engineering & Safety Structures: Access platforms, staircases, guardrails, and supporting brackets in exposed outdoor industrial sites.
Why Choose S275J0 Over Other Grades?
Versus S275JR: S275J0 provides a critical safety margin for cold service. While S275JR is only impact-tested at +20°C, S275J0 is certified for 0°C, making it the preferred choice for any structure where the temperature can drop to freezing.
Versus S235J0: S275J0 offers higher yield strength (275 MPa vs. 235 MPa) for the same low-temperature toughness, allowing for stronger or more weight-efficient designs in cold environments.
Code Compliance: In many European and international codes (Eurocodes), S275J0 is specified for primary structural elements in geographic zones with cold winters.
Important Note:
S275J0 is not corrosion-resistant and requires protective coatings (e.g., painting, galvanizing) for outdoor use. For even colder environments (below -10°C to -20°C), grades like S275J2 or S355J2 (with toughness at -20°C) should be considered.
1. What is S275J0 steel?
S275J0 is a non-alloy structural steel grade per EN 10025-2, with a minimum yield strength of 275 MPa and guaranteed impact toughness at 0°C.
2. What does the 'J0' in S275J0 mean?
The 'J0' indicates Charpy V-notch impact testing at 0°C, ensuring a minimum absorbed energy of 27 Joules for use in cold environments.
3. What is the difference between S275JR and S275J0?
S275JR is impact tested at +20°C, while S275J0 is tested at 0°C, making J0 suitable for structures exposed to near-freezing temperatures.
4. What are the main applications of S275J0?
It is used in structural components for bridges, buildings, and outdoor infrastructure in temperate climates where temperatures may drop to 0°C.
5. What is the yield strength of S275J0?
The minimum yield strength is 275 MPa for thicknesses up to 16 mm, with decreasing values for thicker sections as per the standard.
6. Can S275J0 be welded?
Yes, S275J0 has good weldability. However, preheating or controlled procedures may be recommended for thicker sections or welding in cold conditions.
7. Is S275J0 equivalent to ASTM A572 Grade 50?
Not directly. While both have similar yield strength (~345 MPa for A572 Gr 50 vs. 275 MPa for S275J0), A572 Grade 50 has higher strength and different toughness requirements.
8. What is the chemical composition of S275J0?
It typically contains max 0.21% Carbon, max 1.50% Manganese, and controlled levels of phosphorus and sulfur (e.g., P ≤ 0.035%, S ≤ 0.035%).
9. Is S275J0 corrosion resistant?
No, S275J0 is not corrosion-resistant and requires protective coatings like painting or galvanizing for outdoor exposure.
10. What is the difference between S275J0 and S355J0?
S355J0 has a higher minimum yield strength (355 MPa) but similar impact toughness at 0°C, making it stronger for cold-weather applications.
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.
