S275J2 is a European standard (EN 10025-2) non-alloy structural steel known for its good weldability, formability, and toughness, especially at low temperatures, indicated by the "J2" (27 joules impact energy at -20°C). It offers a minimum yield strength of 275 MPa, making it a versatile, high-tensile steel used in bridges, power plants, and wind towers, often supplied normalized or control rolled.
Key Characteristics:
S275: Indicates a minimum yield strength of 275 MPa (N/mm²).
J2: Signifies a Charpy V-notch impact test at -20°C, requiring at least 27 Joules of energy.
Low Carbon: A low-carbon, high-tensile steel that is easily weldable.
Properties:
Yield Strength: Minimum 275 MPa.
Tensile Strength: 430-580 MPa.
Elongation: Around 23%.
Hardness: Typically 130-180 HB (Brinell).
Chemical composition % of steel S275J2 (1.0145): EN 10025-2-2004
| Nominal thickness =< 40(mm) CEV max = 0.40 |
| C | Mn | P | S | Cu | CEV |
| max 0.18 | max 1.5 | max 0.03 | max 0.03 | max 0.55 | max 0.42 |
Equivalent grades of steel S275J2 (1.0145)
Warning! Only for reference
| EU EN |
England BS |
European old EN |
Belgium NBN |
China GB |
Sweden SS |
India IS |
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| S275J2 |
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S275J2 steel does not have a direct, universally standardized equivalent in other major systems (like ASTM or JIS) due to its specific European norm combination of strength (275 MPa yield) and low-temperature toughness (-20°C impact). However, it can be functionally matched or substituted based on key properties.
Closest Functional / Spec-Based Equivalents:
| Standard | Potential Equivalent / Match | Key Similarities & Important Differences |
|---|---|---|
| ASTM (USA) | ASTM A709 Grade 36 | Similar yield strength (~250 MPa min), and includes Charpy V-notch requirements at -18°C (close to -20°C). This is the closest match in intent for structural bridge/work in cold climates. |
| ASTM A572 Grade 42 | Similar yield strength (290 MPa min), but no mandatory impact toughness in standard supply. Not equivalent for cold service without supplemental testing. | |
| EN (Europe) | S275J0 or S275JR | Same strength, but higher impact test temperatures (0°C and +20°C respectively). Not equivalent for -20°C service. |
| ISO | ISO 630-2 E275B or E275C | Similar strength. ISO "C" designates -20°C impact testing, making E275C a potential international cross-standard match. |
| JIS (Japan) | SM490A or SM490B | Similar or higher strength (325-490 MPa yield), but no standard low-temperature impact properties in common grades. Not a direct equivalent. |
Critical Consideration for Equivalency:
True equivalence requires matching both:
Minimum Yield Strength: 275 MPa.
Guaranteed Impact Toughness: Minimum 27 J at -20°C.
Summary of Best Matches:
For general structural use without low-temperature mandates: ASTM A572 Grade 42 or SM490A/B may be considered, but they are not equivalent for critical cold-service applications.
For structural applications requiring certified toughness at -20°C: ASTM A709 Grade 36 (for bridges) or ISO E275C are the closest functional matches in other standards.
For design or procurement: Always verify the specific project codes and specification requirements. "Equivalency" must be approved by a qualified engineer, as standards govern testing, marking, and chemical limits differently.
1. What is S275J2 steel?
S275J2 is a non-alloy structural steel grade per EN 10025-2, with a minimum yield strength of 275 MPa and guaranteed impact toughness at -20°C.
2. What does the 'J2' in S275J2 mean?
The 'J2' indicates Charpy V-notch impact testing at -20°C, ensuring a minimum absorbed energy of 27 Joules for use in cold environments.
3. What are the main applications of S275J2?
It is used in structural components exposed to cold climates, such as bridges, offshore platforms, transmission towers, and industrial buildings in regions with harsh winters.
4. What is the difference between S275JR and S275J2?
S275JR is impact tested at +20°C, while S275J2 is tested at -20°C, making J2 suitable for applications where temperatures drop well below freezing.
5. What is the yield strength of S275J2?
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 S275J2 be welded?
Yes, S275J2 has good weldability. However, proper procedures-including potential preheating and use of suitable filler metals-are essential, especially for thick sections or welding in cold conditions.
7. What is the chemical composition of S275J2?
It typically contains max 0.20% Carbon, max 1.50% Manganese, and controlled levels of phosphorus and sulfur (e.g., P ≤ 0.035%, S ≤ 0.035%).
8. Is S275J2 equivalent to ASTM A572 Grade 50?
No, S275J2 has lower yield strength (275 MPa vs. 345 MPa) and includes mandatory -20°C impact testing, while A572 Grade 50 generally has no mandatory toughness requirement.
9. What is the difference between S275J2 and S355J2?
S355J2 has a higher minimum yield strength (355 MPa) but similar impact toughness at -20°C, making it stronger for cold-weather applications.
10. Is S275J2 corrosion resistant?
No, S275J2 is not corrosion-resistant. Like other carbon structural steels, it requires protective coatings such as painting or galvanizing for outdoor use.
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.
