S355JR Hot Rolled Structural Steel Plate
S: Structural steel.
355: Min yield strength 355 MPa.
JR: Impact 27 J at +20°C.
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S355JR steel is a European structural steel grade that falls under the EN 10025 standard. It is classified as a low-carbon structural steel, primarily used in construction and engineering applications. The steel's composition includes a balanced mix of iron, carbon, and other alloying elements, which contribute to its mechanical properties and overall performance.
"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.
Chemical Composition
| Element (Symbol and Name) | Percentage Range (%) |
|---|---|
| C (Carbon) | 0.12 - 0.20 |
| Mn (Manganese) | 1.0 - 1.6 |
| Si (Silicon) | 0.0 - 0.5 |
| P (Phosphorus) | ≤ 0.045 |
| S (Sulfur) | ≤ 0.045 |
| N (Nitrogen) | ≤ 0.012 |
Mechanical Properties
| Property | Condition/Temper | Typical Value/Range (Metric - SI Units) | Typical Value/Range (Imperial Units) | Reference Standard for Test Method |
|---|---|---|---|---|
| Yield Strength (0.2% offset) | Normalized | 355 MPa | 51.5 ksi | EN 10002-1 |
| Tensile Strength | Normalized | 470 - 630 MPa | 68 - 91 ksi | EN 10002-1 |
| Elongation | Normalized | ≥ 21% | ≥ 21% | EN 10002-1 |
| Reduction of Area | Normalized | ≥ 25% | ≥ 25% | EN 10002-1 |
| Hardness (Brinell) | Normalized | ≤ 197 HB | ≤ 197 HB | EN 10003-1 |
| Impact Strength (Charpy V-notch) | -40°C | ≥ 27 J | ≥ 20 ft-lbf | EN ISO 148-1 |
Equivalent grades of steel S355JR (1.0045)
Warning! Only for reference
| EU EN |
USA - |
Germany DIN,WNr |
Japan JIS |
France AFNOR |
England BS |
Canada HG |
European old EN |
Italy UNI |
Belgium NBN |
Spain UNE |
China GB |
Sweden SS |
Inter ISO |
Portugal NP |
India IS |
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Application
S355JR steel plates are widely used in the following fields due to their high strength, excellent toughness and weldability:
Construction field: Applied to the frame structures, beams, columns, floor slabs, etc. of high-rise buildings and workshops; as well as the supporting structures and roof structures (e.g., long-span roofs) of commercial buildings.
Bridge engineering: Serving as the main load-bearing components of bridges (e.g., girders and cross beams), their high strength and toughness play a crucial role in withstanding natural forces such as earthquakes and wind loads.
Shipbuilding industry: Utilized in hull structures, decks, bulkheads, trusses, etc., meeting the shipbuilding industry's stringent requirements for material strength and corrosion resistance.
Machinery manufacturing: Fabricating structural components of heavy machinery and equipment (e.g., key parts of tractors, harvesters and agricultural machinery), as well as for vehicle manufacturing (e.g., vehicle frames and chassis).
Other fields: Pressure vessels, wind turbine towers, chemical equipment, etc., suitable for harsh conditions such as high temperature, high pressure and strong corrosion.
Welding
Steel S335JR has good weldability using various welding methods, both without heating and with pre-heating, and followed by high-temperature processing .
| Welding Process | Recommended Filler Metal (AWS Classification) | Typical Shielding Gas/Flux | Notes |
|---|---|---|---|
| MIG | ER70S-6 | Argon + CO2 mix | Good for thin sections |
| TIG | ER70S-2 | Argon | Suitable for clean joints |
| Stick (SMAW) | E7018 | - | Requires preheat for thick sections |
Why Choose GNEE steel for S355JR EN 10025-2?
GNEE steel is a trusted supplier of S355JR EN 10025-2, offering:
Certified Quality: Plates undergo ultrasonic testing and chemical analysis to meet EN standards.
Customization: Available in thicknesses from 6–300 mm, with options for normalization.
Global Supply: Competitive pricing and reliable delivery worldwide.
Technical Support: Guidance on grades like EN 10025-2 S355K2 steel or EN 10025-2 S235J2 steel.
If you want to learn more about GNEE's products, you can send an email to info@gneesteels.com. We are more than happy to assist you.
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.
| Other steel plate | ||||
| Name | Material | Specification (mm) | Tons | Remark |
| Clad steel plate | P265GH+410,S355JR+410,A516Gr70+316, A537CL1+304L,Q235B+304L,Q345B+304, A516Gr70(NACE)+410,A537CL1+904L, A537CL1+316L,A516Gr70+304L,A537CL1+304 ,A516Gr70+410,A516Gr70+904L |
2-300mm(Based plate),1-50mm(Composited plate) | / | UT, AR, TMCP.Normalized, Quenched and Tempered,Z Direction Test, Charpy V-Notch impact TestThe Third Party Test , Coated or Shot Blasting and Painting. |
| Low Alloy | Q345A, Q345B, Q345C, Q345D, Q345E, Q390, Q420, Q460C, ST52-3, S355J2+N, SS400, SA302GrC, S275NL, 35CrMo | 6 - 350 | 5788.56 | Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection |
| Pressure Vessel Plate | Q245R, Q345R, Q370R, 16MnDR, 09MnNiDR, 15CrMoR, 14Cr1MoR, 12Cr2Mo1R, SA516Gr60, SA516Gr70, SA516Gr485, SA285, SA387Gr11, SA387Gr12, SA387Gr22, P265,P295,P355GH,Q245R(R-HIC),Q345R(R-HIC) | 3 - 300 | 8650 | Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection |
| High-Strength Plate | WH785D/E,Q960D/E, Q890D/E,WH60D/E,WH70B,Q550D,Q590D,Q690D/E | 8 - 120 | 3086.352 | Quenched and tempered |
| Wear-Resistant Plate | NM360, NM400, NM450, NM500 | 6 - 150 | 3866.297 | Quenched and tempered |
| Bridge Plate | Q235qC, Q345qC, Q370qC, Q420qC, Q345qDNH, Q370qDNH, A709 - 50F - 2, A709 - 50T - 2 | 8 - 200 | 2853.621 | Hot rolling, normalized ,hot rolling controlled rolling, quenched and tempered + toughness and brittleness |
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