Steel grade EN 10025 S355
S355 steel is a European standard structural steel commonly used in Europe. The material is better than S235 and S275 structural steel in terms of yield strength, tensile strength and other properties. According to EN 10025, S355 material is divided into the following quality grades, for example:
| S355 steel group | ||
|---|---|---|
| Standard | Steel/quality grade | Material number |
| DIN EN 10025-2 | S355JR | 1.0045 |
| S355J0 | 1.0553 | |
| S355J2 | 1.0577 | |
| S355K2 | 1.0596 | |
| DIN EN 10025-3 | S355N | 1.0545 |
| S355NL | 1.0546 | |
| DIN EN 10025-4 | S355M | 1.8823 |
| S355ML | 1.8834 | |
| DIN EN 10025-5 | S355J0W | 1.8959 |
| S355J2W | 1.8965 | |
| S355K2W | 1.8967 | |
| S355J4W | 1.8787 | |
| S355J5W | 1.8991 | |
| S355J0WP | 1.8945 | |
| S355J2WP | 1.8946 | |
| EN 10149-2 | S355MC | 1.0976 |
| EN 10149-3 | S355NC | 1.0977 |
| EN 10210-1 | S355J0H | 1.0547 |
| S355J2H | 1.0576 | |
| S355K2H | 1.0512 | |
| S355NH | 1.0539 | |
| S355NLH | 1.0549 | |
| EN 10210-3 | S355MH | 1.8845 |
| S355MLH | 1.8846 | |
| EN 10248-1 | S355GP | 1.0083 |
Meaning of material S355 (designation)
The following letters and numbers explain the meaning of S355 steel:
- “S” is the abbreviation for “Structural Steel”;
- “355” indicates the minimum value of the yield strength for flat and long steels with a thickness ≤ 16mm;
- “JR” means that the impact energy value is a minimum of 27 J at room temperature (20°C);
- “J0” indicates that the steel can withstand impact energy of at least 27 J at 0°C;
- “J2” indicates that the minimum impact energy value is 27 J at -20°C;
- “K2” indicates that the minimum impact energy value is 40 J at -20°C.
- J4: minimum 27J at -40 °C
- J5: minimum 27J at -50 °C
- M: thermomechanically laminated
- N: Normalized or rolled normalized
- L: Low temperature
- W: weather resistant
- C: Special cold forming
- H: Hollow section
- G: Other characteristics, if necessary, with 1 or 2 digits.
- Q: Sheet piling
- P (EN 10025-5): For the class with the highest phosphorus content (only in the case of class S355)
- D: Hot dip coating
- +Z: Hot dip zinc coating (galvanized)
- More designation and meaning of European steel names
Properties and specifications of S355 steel
The tables below show the properties and specifications of S355 steel according to EN 10025-2, including chemical composition, yield strength, tensile strength and elongation, etc.
Chemical composition
The data sheet below shows the chemical composition of the S355 material based on thermal analysis.
| Chemical Composition S355 (%, ≤) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Standard | Steel | Note | W | Yes | Mn | P | s | Ass | N | Deoxidation method |
| EN 10025-2 | S355 | S355JR | 0.24 | 0.55 | 1.60 | 0.035 | 0.035 | 0.55 | 0.012 | Rimmed steel is not permitted |
| S355J0 (S355JO) | 0.20 | 0.55 | 1.60 | 0.030 | 0.030 | 0.55 | 0.012 | |||
| S355J2 | 0.20 | 0.55 | 1.60 | 0.025 | 0.025 | 0.55 | – | Totally dead | ||
| S355K2 | 0.20 | 0.55 | 1.60 | 0.025 | 0.025 | 0.55 | – | |||
Comments:
- For S355J0, S355J2 and S355K2: C ≤ 0.22% for thickness > 30 mm.
- C by agreement for profiles with nominal thickness > 100 mm.
- For long products, the P and S content can be 0.005% higher.
Mechanical properties
The data sheet below provides mechanical properties of EN 10025 S355 steel such as yield strength, tensile strength and elongation.
Yield strength
| Yield strength S355 (MPa, ≥); Thickness |
|---|
