What is grade S355 steel?

S355 is a high-strength, low-alloy structural steel known for its high minimum yield strength of 355MPa, good weldability, and durability. It is a versatile steel conforming to European standards, used widely in construction, heavy machinery, bridges, and offshore structures. Various grades, such as S355JR, S355J0, and S355J2, are available, differing in their impact energy requirements at specific temperatures.

S355 is a European standard for high-strength, low-alloy structural steel, known for its good weldability and high yield strength of at least

355 MPa. It is widely used in construction, bridge engineering, heavy machinery, offshore structures, and the energy sector due to its strength and versatility. The specific quality grade, like S355JR or S355J2, indicates different mechanical properties such as impact energy at specific temperatures.

Key characteristics

High strength:

The "355" in the name signifies a minimum yield strength of 355 MPa.

Excellent weldability:

S355 steel is easy to weld using conventional methods.

High toughness:

It maintains good impact resistance, especially at lower temperatures depending on the specific grade.

Versatility:

It can be used in a variety of applications and is suitable for structural fabrication.

Common grades

S355JR: Meets a minimum impact energy of 27J at+20℃.

S355J0: Meets a minimum impact energy of  27J at 0℃.

S355J2: Meets a minimum impact energy of 27J at -20℃.

S355K2: Meets a minimum impact energy of 40J at -20℃.

Equivalents

ASTM: ASTM A572 Grade 50 is often considered an equivalent, as both are high-strength, low-alloy steels with similar properties.

China: Q355B is the Chinese equivalent.

Which is better, S275 or S355?

S275 provides a lower strength (than S355) but has good machinability and can be welded. The average minimum yield for S275 steel is 275 N/mm² giving its name: S275. BS EN 10025 S355, S355JR, S355J2 and S355J2+N supercedes BS4360 50A, 50B, 50C 50D. S275 sheet/plate can also be flame cut to a profile on request.

What is the equivalent of S355 steel?

What is the American equivalent of S355?

S355 Equivalent Plate Grade

Meets European structural steel standard EN 10025:2004.

Similar to ASTM A572 and ASTM A709 steel grades.

The chemical composition and mechanical properties of S355 are governed by EN Standards However, some projects may require materials that meet ASTM standards. ASTM has identified A572-50 as an acceptable substitution for S355.

What is the difference between A36 and S355?

A36 has lower yield strength (~250 MPa), while S355 starts at 355 MPa. S355 is stronger and follows European standards.

The main difference is that

S355 has significantly higher strength, with a minimum yield strength of 355MPa, compared to A36's minimum yield strength of 250MPa. This makes S355 suitable for heavier-duty applications where a lighter structure is needed, while A36 is a more general, lower-cost structural steel for less demanding scenarios. S355 is a European standard, and A36 is an American standard.

What is the difference between A36 and s355j2h?

The primary difference between ASTM A36 and EN S355J2H steel is in their strength and toughness: S355J2H offers significantly higher minimum yield strength and better low-temperature impact toughness compared to A36.

Mechanical Properties S355J2WP offers higher yield strength (355 MPa) and tensile strength compared to A36, which has a yield strength of 250 MPa. This makes S355J2WP more suitable for load-bearing structures and applications requiring higher strength.

Summary

Strength: S355J2H is a significantly stronger steel, with a minimum yield strength of 355 MPa compared to A36's 250 MPa. This allows for the use of lighter sections for the same load-bearing requirements.

Toughness: S355J2H is specifically tested and guaranteed to have good impact toughness at temperatures as low as -20°C, which is critical for cold-weather applications. A36 does not have the same mandatory low-temperature impact requirements.

Weldability: Both are considered highly weldable; however, the more controlled chemical composition of S355J2H (specifically lower carbon and higher manganese) can enhance its weldability and resistance to cracking in certain scenarios.

Application & Availability: A36 is widely available and used for general structural purposes in North America where moderate strength is sufficient. S355J2H is an EN standard used in Europe and elsewhere for projects requiring higher strength and guaranteed low-temperature performance, such as bridges, cranes, and heavy equipment.

What is steel S355J2 equivalent to?

ASTM A572 Grade 50

ASTM A572 Grade 50 (USA):Widely used in construction and structural applications. Comparable strength and chemical composition to S355J2+N. DIN St52-3 (Germany):Known for its excellent weldability and good cold-forming properties.

What material is S355J2H?

EN10210 S355J2H is a European standard hot finished structural hollow section made from non-alloy quality steel. It is primarily used for structural and mechanical applications in a variety of industries due to its high strength and excellent toughness.

What is S355J2 equivalent material in China?

Q345D

EN10025 S355J2 is low alloy steel commonly used in Europe. EN10025 S355J2 equivalent grade in China is Q345D. Their chemical composition is slightly different and mechanical properties are similar.

What does the H mean in S355J2H?

Rolled, seamless or welded steel pipes in the form of hollow sections according to DIN EN 10210 or DIN EN 10219, in round or square dimension. The "H" in the material designation indicates the grade as a hollow profile.

Is S355J2 mild steel?

S355J2 is a medium tensile, low carbon manganese steel which is readily weldable and possess good impact resistance (also in sub-zero temperatures). This material is commonly supplied in the untreated or normalized condition. Machinability of this material is similar to that of mild steel.

What is the temperature range for S355J2H?

Usually, Cold Formed EN 10219 S355J2H Rectangular Hollow Section is used between the temperature range of 500 Degree C to 800 Degree C and In continuous service, It can be used up to 899 Degree C. it can be used effectively at high elevated temperature.

What is the difference between S355JRH and S355J2H?

S355JRH vs S355J2H: S355JRH is suitable for room-temperature applications, while S355J2H offers better low-temperature toughness (-20°C).

What is the equivalent of S355J2 steel?

DH36 and EH36,ABS Grade DH36 and ABS Grade EH36 are both ok for replacing of S355J2+N. Second we can suggest you choose alloy structural steel ASTM A572Gr50 (minimum yield strength 345 MPa, Tensile above 450 MPa).

What is the difference between S355JR and S355J2H?

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 is the Chinese equivalent of S355JR?

S355JR is a European standard grade for hot-rolled structural steels with a minimum yield strength of 355 MPa. Its equivalents in other standards offer similar properties for international sourcing. Common equivalents include ASTM A572 Grade 50 (USA), DIN ST52-3 (Germany), JIS SM490A (Japan), and GB Q345B (China).

What is the yield strength of S355J2 steel?

355 MPa

Grade S355J2 has a minimum yield strength of 355 MPa.

What is the difference between S355 J2 and S355 K2?

However, what is the difference between S355J2 and S355K2 steel plates? It mainly lies in their impact test: J2 symbol Charpy V-Notch Impact Tested Longitudinal 27 Joules at -20 ˚C under 150mm thickness. K2 symbol Charpy V-Notch Impact Tested Longitudinal 40 Joules at -20 ˚C max 100mm thickness.

What is S275JR equivalent in China?

Q275 steel

S275JR EN 10025 steel is structural grade steel with a minimum yield strength of 275 N/mm². S275JR EN 10025 equivalent steel material in China is Q275 steel

What is the yield strength of S355J2H?

It is often used to manufacture pressure vessels, transmission pipelines and various engineering machinery. S355J2H steel pipe has excellent mechanical properties, with a minimum yield point of 355MPa, a minimum tensile strength of 510-680MPa, a minimum elongation of 22%, and a maximum strip shrinkage of 30%.

What is the difference between S355JR and S355J0?

S355JR: This grade has a minimum yield strength of 355 megapascals (MPa) and a minimum tensile strength of 470-630 MPa. It offers good weldability, machinability, and formability. S355J0: S355J0 also has a minimum yield strength of 355 MPa, but its minimum tensile strength is slightly lower, ranging from 470-630 MPa.

What is the strength of S355J2 material?

470 to 630 MPa

S355J2 steel is known for its mechanical properties, making it ideal for structural applications. Its tensile strength ranges from 470 to 630 MPa, with a minimum yield strength of 355 MPa for thicknesses below 16 mm.

What is the difference between S355JR and S355J2?

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.

Differences between S355JR and S355J2+N steel

The second part of the abbreviation of this particular type of structural steel indicates the resilience value. Resilience indicates the quantity of energy that is absorbed by the alloy during an elastic deformation process. In other words, a material is able to absorb energy and in doing so resists external dynamic forces that instead push the steel to break.

S355JR steel has a minimum impact strength of 27 J under 20-degree temperature conditions while the second type of steel, S355J2+N has the same impact strength but with a temperature of -20 degrees. Instead the N indicates that the steel has undergone the normalisation process, a heat treatment by which the crystalline grain of the steel is refined and made more uniform, increasing the strength of the material and moving the ductile-brittle transition.

The qualities of so-called construction steels include excellent toughness, a good relationship between weldability and machinability, hardness, heat resistance and are used for the construction of machinery, motorway bridges, building structures and in the naval sector, with solid results that focus on exploiting spaces as they do not need support elements, in any case guaranteeing maximum safety.

Which to choose, S355JR or S355J2?

Impact Toughness (Charpy V-Notch Test):

S355JR: Tested at 20°C with a minimum Charpy impact energy of 27 Joules.

S355J2: Tested at -20°C with a minimum Charpy impact energy of 27 Joules, making it more suitable for colder conditions. The "J2" designation indicates it has higher resilience at low temperatures.

Application Suitability:

S355JR: Commonly used in structural applications, construction, and fabrication where ambient temperatures are moderate.

S355J2: Preferred for projects exposed to lower temperatures or requiring better impact resistance in cold climates. It is often chosen for offshore structures, bridges, and heavy-duty parts in colder regions.

Welding and Processing:

Both grades are well-suited for welding and offer good machinability and formability. S355J2 may be marginally easier to weld due to its slightly improved toughness.

Which to Choose?

For applications in standard or mild temperatures, where cost is a priority, S355JR is typically sufficient.

For applications in colder climates or where impact toughness is critical, S355J2 is preferable.