EN10025 S355JR structural steel plate Material Data

EN10025 S355JR is a high-strength, non-alloy structural steel known for its minimum 355 MPa yield strength, good weldability, and excellent impact toughness at room temp, commonly used in construction, bridges, and machinery, with key properties including 470-630 MPa tensile strength and 27J Charpy V-notch at +20°C.

S355JR Steel Plates Specifications

en 10025-2 s355jr Chemical Composition

The chemical composition of en 10025-2 s355jr is tightly controlled to achieve optimal mechanical properties while maintaining weldability and formability. The table below outlines the typical composition per DIN EN 10025-2:

Key Notes:

Carbon: Limited to 0.24% to ensure good weldability and prevent brittleness, critical for structural applications.

Manganese: Up to 1.60% enhances strength and toughness without compromising ductility.

Phosphorus and Sulfur: Low levels (0.035% max) improve impact resistance, especially at +20°C for JR.

Silicon and Copper: Contribute to atmospheric corrosion resistance, making en 10025-2 s355jr suitable for outdoor structures.

Gangsteel'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.

en 10025-2 s355jr Mechanical Properties

En 10025-2 s355jr offers excellent mechanical properties, making it versatile for structural engineering. The table below summarizes its key properties per DIN EN 10025-2 (for plates up to 16 mm thickness):

Highlights:

Yield Strength: Minimum 355 MPa ensures structural stability under heavy loads, ideal for bridges and buildings.

Tensile Strength: The 470–630 MPa range provides robustness for dynamic applications.

Elongation: 20% ductility supports forming and welding without cracking.

Impact Toughness: 27 J at +20°C ensures performance in standard conditions, less stringent than EN 10025-2 S355J2 steel (-20°C).

Compared to lower grades like EN 10025-2 S275JR (yield 275 MPa) or EN 10025-2 S235JR (yield 235 MPa), en 10025-2 s355jr offers higher strength, allowing for thinner plates and weight savings in designs.

en 10025-2 s355jr Thickness Tolerance

Thickness tolerance for en 10025-2 s355jr is governed by EN 10029, which specifies tolerances for hot-rolled plates 3 mm thick or above. For S355JR (non-alloy structural steel with ReH ≥ 360 N/mm²), the default is Class A, unless otherwise specified. The table below summarizes EN 10029 Class A thickness tolerances:

Key Notes:

Class A: Standard tolerance for non-alloy steels; tighter classes (B, C, D) are available for precision applications.

Measurement: Tolerances apply outside ground areas; for plates with trimmed edges, tolerances are measured at least 100 mm from the edge.

Customization: Gangsteel offers plates with special tolerances upon request, ensuring compliance with EN 10029 for en 10025-2 s355jr.

These tolerances ensure dimensional accuracy for structural applications, reducing fabrication issues.

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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.

FAQ

What is S355JR equivalent to?

S355JR equivalent grades have very close chemical composition and mechanical properties to that of S355JR steel. Both the S355JR equivalent grades Q345B, A572 Gr 50, ST52-3, SM490B and S355JR steel are main products of BBN steel.

What is structural steel grade S355JR?

S355JR steel has a high strength-to-weight ratio, making it suitable for use in load-bearing structures such as bridges, buildings, and offshore structures. It has a minimum yield strength of 355 N/mm², making it one of the strongest steel grades available.

What is the difference between S355JR and J2?

In S355JR and S355J2 steel, JR and J2 indicates the steel needs to do +20℃ impact test and -20℃ impact test respectively. The different impact temperature is the main difference between S355JR and S355J2 steel. S355J2 steel can better adapt to low temperature work condition than S355JR steel.

What does JR mean in steel?

The J means that the test was conducted with 27 joules of energy. This is followed by either an R for room temperature, or a number referring to the temperature the tests were conducted at. So JR is room temperature (plus 20 degrees) J0 is 0 degrees and J2 is -20 degrees.

Is S355 better than S275?

This grade of steel is stronger than its S275 counterpart with a minimum yield strength of 355 N/mm2 resulting in its S355 name. This grade is also available in plate, round bar, flat bar, and is even available in blocks.

What is the hardness of S355 jr?

Grade S355JR has a minimum yield strength of 355 MPa. The impact energy at a room temperature of 20°C is at least 27 joules.

What is S355 steel used for?

This structural steel is used in shipbuilding and railway vehicle construction. S355 steel also finds optimal application for the construction of machinery such as cranes and excavators, as well as in building and piping construction, ventilation systems and pumps.

What is the price of S355JR per kg?

Mild Steel, Grade: S355JR – 0.61 USD/kg | 610 USD/ton

What is the difference between S275JR and S355JR?

S275JR is carbon steel, while S355JR is low alloy steel. Both carbon steel S275JR and S355JR low alloy steel are under EN10025-2 standard. The S355JR low alloy steel is higher steel grade than carbon steel S275JR.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.