Grade guide · MS / CS & Alloy Steel
S355J2+N: properties, composition, uses and standards
Short answer
S355J2+N is a normalised high-strength structural steel, chosen for heavy structures, cranes and offshore frames., density 7.85 g/cm³.
What is S355J2+N?
S355J2+N is a normalised high-strength structural steel. Engineers choose it for heavy structures, cranes and offshore frames. It is also known as EN 10025-2 S355J2+N, W.Nr 1.0577, High-strength structural steel.
- Designation
- S355J2+N
- Also called
- EN 10025-2 S355J2+N · W.Nr 1.0577 · High-strength structural steel
- Standard
- EN 10025-2 for S355J2
- Density
- 7.85 g/cm³
- Melting range
- 1420 – 1530 °C
- Magnetic
- Magnetic
Chemical composition
| Element | Weight % |
|---|---|
| Carbon | 0.20 max (≤16 mm) |
| Manganese | 1.60 max |
| Silicon | 0.55 max |
| Phosphorus | 0.025 max |
| Sulphur | 0.025 max |
| Copper | 0.55 max |
Per EN 10025-2 for S355J2.
Mechanical properties
| Property | Value |
|---|---|
| Yield strength | 355 MPa (≤16 mm) |
| Tensile strength | 470 – 630 MPa |
| Elongation | 22% |
| Charpy impact | 27 J at −20 °C |
Normalised (+N), minimum values. Values for pipe, bar and forgings differ slightly — see the product standard.
Where S355J2+N is used
- Heavy structures. Bridges, cranes and towers. Industry →
- Offshore. Platform secondary steel. Industry →
- Machinery. Frames and booms. Industry →
Welding S355J2+N
The matching filler is E7018 / ER70S-6. Preheat thick sections.
S355J2+N standards by product
| Product | Standard |
|---|---|
| S355J2+N sheet | EN 10025-2 |
| S355J2+N plate | EN 10025-2 |
| S355J2+N coil | EN 10025-2 |
| S355J2+N pipe & tube | EN 10210 hot-finished hollow sections (S355J2H) · EN 10219 cold-formed hollow sections (S355J2H) |
Buying S355J2+N: what to specify
- The product standard and the UNS or designation — for example EN 10025-2.
- Size, thickness or schedule, and quantity in pieces and kg or metres.
- Heat-treatment condition where the standard offers a choice.
- Certificate: EN 10204 3.1 as standard, 3.2 if a third party must witness.