Meaning of S355J0W and S355J2W Steel Grades
S355J0W Corten Steel and S355J2W Weathering Steel are both atmospheric corrosion-resistant structural steels specified under the EN 10025-5 European standard. These grades belong to the family of weathering steels, also commonly known as corten steel or weather-resistant steel.
The designation of each grade has specific technical meanings:
- S = Structural Steel
- 355 = Minimum yield strength of 355 MPa for thicknesses up to 16 mm
- J0 / J2 = Impact test temperature classification
- W = Weathering resistance, indicating improved atmospheric corrosion resistance
Among them, the main difference between S355J0W and S355J2W lies in their low-temperature impact toughness performance.
Impact Toughness Difference Between J0 and J2
S355J0W requires a minimum impact energy of 27J at 0°C
S355J2W requires a minimum impact energy of 27J at -20°C
This means S355J2W weathering steel has better low-temperature resistance and is more suitable for cold climate environments or structures exposed to extreme winter conditions. S355J0W weathering steel is suitable for use in normal temperature environments.
Chemical Element of S355J0W and S355J2W
| Chemical Element | S355J0W | S355J2W | Function |
|---|---|---|---|
| Carbon (C) | ≤0.16% | ≤0.16% | Low carbon design reduces welding crack risk and improves weldability |
| Manganese (Mn) | 0.50-1.50% | 0.50-1.60% | Improves strength, toughness, and hardenability |
| Silicon (Si) | ≤0.50% | ≤0.50% | Enhances steel strength and corrosion resistance |
| Phosphorus (P) | ≤0.030% | ≤0.030% | Improves atmospheric corrosion resistance |
| Sulfur (S) | ≤0.025% | ≤0.030% | Low sulfur content reduces hot working defects |
| Chromium (Cr) | 0.40-0.80% | 0.40-0.80% | Works with copper to improve corrosion resistance |
| Copper (Cu) | 0.25-0.55% | 0.23-0.55% | Key element for forming dense protective oxide layer in weathering steel |
| Nickel (Ni) | ≤0.65% | ≤0.65% | Enhances toughness and weather resistance |
| Molybdenum (Mo) | ≤0.30% | ≤0.30% | Improves corrosion resistance and high-temperature performance |
The core chemical compositions of S355J0W and S355J2W weathering steel plates are highly similar, with only slight differences in certain alloy element ranges. Both grades provide excellent atmospheric corrosion resistance and are widely used in outdoor structural applications.
Contact now to get S355J0W Corten Steel Quote
Mechanical Property of S355J0W and S355J2W
| Mechanical Property | S355J0W | S355J2W | Description |
|---|---|---|---|
| Yield Strength (≤16mm) | ≥355 MPa | ≥355 MPa | High structural strength for outdoor applications |
| Yield Strength (16-40mm) | ≥345 MPa | ≥345 MPa | Maintains stable load-bearing capacity |
| Yield Strength (40-63mm) | ≥335 MPa | ≥335 MPa | Suitable for heavy structural components |
| Tensile Strength | 470-630 MPa | 470-630 MPa | Excellent balance of strength and toughness |
| Elongation | ≥22% | ≥22% | Good ductility and forming performance |
| Impact Test Temperature | 0°C | -20°C | Different low-temperature toughness grades |
| Impact Energy (Akv) | ≥27J at 0°C | ≥27J at -20°C | J2W offers better crack resistance in cold environments |
The yield strength, tensile strength, and elongation of S355J0W and S355J2W weathering steel plates are generally similar. The primary difference lies in low-temperature impact toughness.
Advantages of S355J0W and S355J2W Weathering Steel
Compared with S355J2W, S355J0W corten steel is more commonly used in standard outdoor engineering projects operating under normal temperature conditions.
Since most atmospheric corrosion environments do not require ultra-low-temperature impact performance, S355J0W can provide an excellent balance between strength, corrosion resistance, and cost efficiency.
S355J0W weathering steel plate offers stable mechanical properties, excellent weldability, and reliable atmospheric corrosion resistance while maintaining a more economical production cost.
This makes it highly suitable for large-scale structural applications where both durability and budget control are important.
In addition, S355J0W steel plate is widely available in the global steel market, with more flexible supply dimensions and shorter delivery times compared with low-temperature grades.
For projects located in temperate or subtropical climates, S355J0W weather resistant steel can fully satisfy long-term outdoor service requirements without the additional cost associated with enhanced low-temperature toughness grades.
Contact now to get S355J0W Corten Steel Quote
Application of S355J0W and S355J2W Corten Steel
S355J0W Suitable Applications:
S355J0W weathering steel is suitable for engineering projects in temperate and subtropical climates, including urban road bridges and landscape bridges in temperate cities, general vehicle chassis structures, shipping containers, building support components and façades in high-humidity regions, as well as nearshore port facilities in non-extreme cold areas.
S355J2W Suitable Applications:
S355J2W corten steel is designed for colder environments and is widely used in highway bridges in cold regions, high-speed railway bridges (such as weathering steel railway bridges in Northern Europe), high-speed train bogie frames, polar transportation vehicle components, cold-region building structures and outdoor sculptures requiring resistance to low-temperature cracking, as well as northern port equipment and high-latitude offshore platforms.
S355J0W and S355J2W
The core difference between S355J0W and S355J2W lies in low-temperature toughness. S355J2W can maintain excellent impact resistance at -20°C, while S355J0W is designed primarily for normal temperature service conditions.
S355J0W is more economical, while S355J2W has slightly higher costs due to stricter low-temperature performance requirements.
Regarding service environments, S355J0W is suitable for temperate and subtropical regions, whereas S355J2W is designed for cold climate and low-temperature high-humidity areas.
If you are looking for a cost-effective weathering steel solution with excellent corrosion resistance and stable structural performance, S355J0W corten steel plate is an ideal choice for long-term outdoor applications such as bridges, containers, and architectural projects. Please feel free to contact us for the latest price and technical support today.
Contact now to get S355J0W Corten Steel Quote
What is S355J0W steel plate?
S355J0W is an EN 10025-5 weathering steel (corten steel) designed for atmospheric corrosion resistance. It is a low-alloy structural steel that forms a protective patina layer when exposed to weather, helping to reduce corrosion and extend service life in outdoor environments.
What is S355J0W used for?
S355J0W weathering steel is widely used in bridges, railway wagons, shipping containers, building façades, landscape structures, outdoor sculptures, and general steel structures exposed to atmospheric conditions, especially in temperate and non-extreme cold regions.
What is the difference between S355J0W and S355J2W?
The main difference is low-temperature impact toughness. S355J0W is tested at 0°C, while S355J2W is tested at -20°C, meaning S355J2W performs better in colder climates. Their strength and corrosion resistance are otherwise very similar.
Does S355J0W steel rust?
Yes, but in a controlled way. S355J0W forms a dense protective rust layer (patina) on its surface, which prevents deeper corrosion. This makes it different from ordinary carbon steel, which continues to corrode without protection.
