What is S235J2?
S235J2 is a non-alloy structural steel grade according to EN 10025-2. It is similar to S235J0 but has enhanced low-temperature toughness, with Charpy V-notch impact energy specified at –20 °C. It is widely used in construction, bridges, machinery, and general welded or fabricated structural components, offering good weldability, ductility, and formability.
Chemical Composition (Typical Maximum Values)
| Element | Content (wt. %) |
|---|---|
| Carbon (C) | 0.17 max |
| Manganese (Mn) | 1.40 max |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.035 max |
| Silicon (Si) | 0.40 max |
Composition ensures good weldability and structural performance.
Mechanical Properties
| Property | Value |
|---|---|
| Minimum Yield Strength | 235 MPa |
| Tensile Strength | 360–510 MPa |
| Elongation | ≥ 26% (≤16 mm), ≥ 23% (16–40 mm), ≥ 22% (40–63 mm) |
| Charpy V-Notch Impact | 27 J at –20 °C |
| Weldability | Excellent |
| Formability | Good; suitable for bending, rolling, and fabrication |
What is S235J0?
S235J0 is a non-alloy structural steel grade under EN 10025-2, designed for general structural engineering with moderate strength, good weldability, and improved low-temperature toughness compared with S235JR. The "J0" designation indicates Charpy V-notch impact energy of 27 J at 0 °C, making it suitable for structures exposed to moderate cold temperatures.
Chemical Composition (Typical Maximum Values)
| Element | Content (wt. %) |
|---|---|
| Carbon (C) | 0.17 max |
| Manganese (Mn) | 1.40 max |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.035 max |
| Silicon (Si) | 0.40 max |
The composition ensures good weldability and ductility for structural fabrication.
Mechanical Properties
| Property | Value |
|---|---|
| Minimum Yield Strength | 235 MPa |
| Tensile Strength | 360–510 MPa |
| Elongation | ≥ 26% (≤16 mm), ≥ 23% (16–40 mm), ≥ 22% (40–63 mm) |
| Charpy V-Notch Impact | 27 J at 0 °C |
| Weldability | Excellent |
| Formability | Good; suitable for bending, rolling, and fabrication |
What is the difference?
The main difference between S235JR, S235J0, and S235J2 lies in their low-temperature toughness, while all have a minimum yield strength of 235 MPa and similar chemical composition.
| Grade | Charpy V-Notch Impact | Temperature | Notes |
|---|---|---|---|
| S235JR | 27 J | +20 °C | Standard structural steel for general applications |
| S235J0 | 27 J | 0 °C | Improved toughness for moderately cold environments |
| S235J2 | 27 J | –20 °C | Superior low-temperature toughness for cold climates |
Summary:
S235JR is suitable for standard structural applications.
S235J0 is used where moderate cold resistance is needed.
S235J2 is chosen for colder environments, ensuring safety and toughness at –20 °C.
All three maintain good weldability, ductility, and formability.
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.
