S355JR Low-alloy High-strength Steel Plate

bs en 10025-2 s355jr structural steel plates supplier

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

BS EN 10025-2 is the British version of the European standard for hot-rolled structural steels, with S355JR offering superior strength, weldability, and impact resistance at +20°C.

S355JR is a low alloy high tensile structural steel conforming to the European Standard EN 10025-2.

The alphanumeric designation provides key information about its properties:

"S" signifies "Structural Steel"

"355" indicates the minimum yield strength of 355 MPa

"JR" denotes the impact toughness grade, tested at room temperature (20°C) with a minimum Charpy V-notch impact energy of 27J.

This steel grade offers a balanced combination of strength, toughness, and excellent welding properties, making it suitable for various structural applications across multiple industries.

High Strength-to-Weight Ratio

With a minimum yield strength of 355 MPa, S355JR provides higher load capacity while using less material compared to lower-grade steels like S235 or S275, resulting in more efficient and economical structures.

Excellent Weldability

The controlled carbon content and chemical composition make S355JR suitable for all conventional welding methods without requiring special pre- or post-weld treatments, significantly reducing fabrication time and costs.

Outstanding Toughness

The room temperature impact toughness (≥27J) ensures performance under dynamic loading conditions, making it suitable for structures subject to wind, seismic activity, or other dynamic forces.

Cost-Effective Performance

S355JR offers an optimal balance between performance and cost, providing higher strength than mild steels without the premium cost of specialized high-alloy steels.

Thanks to its high strength, excellent toughness and weldability, S355JR steel plates are widely used in the following fields:

Construction Field

Frame structures, beams, columns and floor slabs of high-rise buildings and factory buildings.

Supporting structures and roof structures of commercial buildings (e.g., roofs with large spans).

Main load-bearing components of bridges (e.g., beam bodies and cross beams).

Shipbuilding Field

Hull structures, decks, bulkheads and trusses, etc.

Machinery Manufacturing

Structural components of heavy machinery and equipment (e.g., key parts of tractors, harvesters and agricultural machinery).

Vehicle manufacturing (e.g., vehicle frames and chassis).

Other Fields

Pressure vessels, wind power towers and chemical equipment, etc.

Manufacturing of equipment such as petroleum pipelines and storage tanks.

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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.