What is En10025-2 S355JR Equivalent Material Grade?

GNEE steel, a globally recognized leader in manufacturing and exporting structural steel plates, supplies premium EN 10025-2 S355JR steel plates, tailored for construction, bridges, and heavy machinery applications in industries such as infrastructure, shipbuilding, and offshore engineering.

EN 10025-2 S355JR is a non-alloy structural steel grade offering high strength, weldability, and impact resistance. This article focuses on the equivalent material grades for EN 10025-2 S355JR, detailing their standard numbers, material designations, and providing detailed tables comparing chemical compositions and mechanical properties to help engineers and fabricators select suitable alternatives.

The specification of S355JR we can offer:
Thickness 8mm-300mm,
Width: 1500-4020mm,
Length: 3000-27000mm

S355JR Delivery Condition:
Hot rolled, CR, Normalized, Quenched, Tempering, Q+T, N+T, TMCP, Z15, Z25, Z35

EN 10025-2 S355JR is widely used in Europe for hot-rolled structural steels with a minimum yield strength of 355 MPa. Its equivalents in other international standards offer similar properties, allowing for global sourcing. Common equivalents include:

• ASTM A572 Grade 50(USA): A high-strength low-alloy structural steel with comparable yield and tensile strength, used in construction and bridges.
• DIN ST52-3(Germany): A non-alloy structural steel with similar mechanical properties and weldability, commonly used in machinery and engineering.
• JIS SM490A(Japan): A rolled steel for welded structures, matching S355JR in strength and toughness for general structural use.
• GB Q345B(China): A low-alloy high-strength steel with equivalent yield strength and impact properties, widely used in buildings and machinery.
• NFA 35-501 E 36-2(France): A structural steel grade with similar composition and performance for construction applications.
• UNI 7070 Fe 510 B(Italy): A non-alloy steel for general structural purposes, offering comparable tensile strength.
• BS 4360 50 B(UK): An older British standard grade with matching strength for welded structures.
• UNE 36.080 AE 355 B(Spain): A structural steel with similar chemical and mechanical characteristics for engineering projects.

These equivalents are selected based on similar chemical limits, mechanical performance, and application suitability. For more on related grades, explore EN 10025-2 S355JR+N or refer to the BS EN 10025-2 material grade overview.

The chemical composition of EN 10025-2 S355JR and its equivalents is designed for good weldability and strength. The table below compares the key elements (% by weight) across selected standards:

Key Notes:

EN 10025-2 S355JR: Balanced for European standards, with low P/S for toughness.

ASTM A572 Gr 50: Slightly lower C and Mn, emphasizing high-strength low-alloy (HSLA) characteristics.

DIN ST52-3: Similar to S355JR, with tighter N control for fine grain.

JIS SM490A: Low C for better weldability, aligned for Japanese structural use.

GB Q345B: Higher Mn for strength, common in Chinese construction.

NFA, UNI, BS, UNE Grades: Close matches with minor variations in P/S for corrosion resistance.

GNEE steel's en 10025-2 s355jr plates undergo stringent chemical analysis to meet DIN EN 10025-2 requirements, with options for additional testing such as ultrasonic inspection.

1. 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.

2. 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.

3. 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.

4. 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.

5. 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.

6. What is the chemical composition of EN 10025-2 S355JR?

EN 10025-2 S355JR has a maximum carbon content of 0.24%, manganese up to 1.60%, phosphorus and sulfur limited to 0.035% each, and silicon up to 0.55%. These limits ensure good weldability and toughness, with nitrogen controlled at 0.012% max for fine grain structure.

7. What are the mechanical properties of EN 10025-2 S355JR equivalents?

Equivalents like ASTM A572 Gr 50 have a yield strength of 345 MPa (min) and tensile strength of 450 MPa (min), with elongation of 21% (50 mm gauge). S355JR itself has 355 MPa yield, 470–630 MPa tensile, and 20% elongation, ensuring comparable performance across standards.

8. How does EN 10025-2 S355JR compare to S275JR?

EN 10025-2 S355JR has a higher yield strength (355 MPa vs. 275 MPa for S275JR) and tensile strength (470–630 MPa vs. 410–560 MPa), making it better for high-load structures. Both have similar weldability, but S355JR is preferred for demanding applications like bridges.

9. What is the weldability of EN 10025-2 S355JR equivalents?

EN 10025-2 S355JR and equivalents like ASTM A572 Gr 50 have low carbon equivalents (CEV ≈ 0.42), allowing welding without preheating up to 25 mm thickness. Use low-hydrogen electrodes (e.g., E7018) to minimize cracking, and PWHT for thicker sections.

10. How to choose the right equivalent for EN 10025-2 S355JR?

Select based on project requirements: ASTM A572 Gr 50 for US codes, GB Q345B for Chinese projects, or DIN ST52-3 for European machinery. Always verify chemical and mechanical matches against EN 10025-2 specs to ensure compatibility.

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GNEE Steel also supplies a variety of high-strength steel plates, such as A514 Grade F, A572 Grade 50, A588 Grade A, S355JR, S690Q, SS400, S690QL, Q345B, Q345E, etc. If you want to know more about other types of steel plates, you can call the consultation hotline at +8615824687445 or send an email to info@gneesteels.com. You are welcome to consult us, and we are very willing to answer your questions.