**1. What is the tensile strength of S355J2H?**
The tensile strength of **S355J2H** (a hollow structural section grade per EN 10210) is **470–630 MPa**, with a minimum yield strength of **355 MPa**.
**2. What is the composition of EN 10025 S355J2?**
The typical composition (EN 10025-2) for **S355J2** is:
- **Carbon (C):** ≤0.22%
- **Manganese (Mn):** ≤1.60%
- **Silicon (Si):** ≤0.55%
- **Phosphorus (P):** ≤0.030%
- **Sulfur (S):** ≤0.025%
- Microalloying elements (e.g., Nb, V, Ti) may be added for grain refinement.
**3. What is EN 10025 S355J0 equivalent to?**
**S355J0** (non-alloy structural steel) is roughly equivalent to:
- **ASTM A36/A572 Grade 50** (USA)
- **DIN St52-3** (Germany)
- **JIS SM490** (Japan).
*Note:* Exact equivalence depends on specific mechanical/chemical requirements.
**4. What is S355J2 material?**
**S355J2** is a non-alloy, thermomechanically rolled structural steel per EN 10025-2. It offers:
- **Yield strength:** ≥355 MPa
- **Good weldability** and toughness (tested at -20°C via Charpy V-notch).
Commonly used in construction, bridges, and heavy machinery due to its balance of strength and ductility.
**5. What is BS EN 10025 S355 and S275?**
- **S355**: Minimum yield strength of **355 MPa**, tensile strength **470–630 MPa**. Used for high-stress applications (e.g., beams, columns).
- **S275**: Minimum yield strength of **275 MPa**, tensile strength **410–560 MPa**. Used for lighter structural components.
*Key difference:* S355 has higher strength but may require stricter welding/preparation compared to S275.
