S355J2WP fully meets the requirements of EN 10025-5 (European standard for atmospheric corrosion-resistant structural steels), but with nuanced distinctions. Here's the detailed breakdown:
1. Key Compliance Checkpoints
| Parameter | EN 10025-5 Requirement | S355J2WP | Status |
|---|---|---|---|
| Chemical Comp. | Cu ≥ 0.30%, Cr ≥ 0.30% | Cu 0.25–0.55%, Cr 0.30–1.25% | ✔️ Exceeds |
| Yield Strength | ≥355 MPa | 355–510 MPa | ✔️ Meets |
| Tensile Strength | 470–630 MPa | 470–630 MPa | ✔️ Meets |
| Impact Toughness | ≥27J @ -20°C | ≥27J @ -20°C | ✔️ Meets |
| Corrosion Index* | ≥6.0 (ISO 9223) | Typically 6.5–7.2 | ✔️ Exceeds |
*Corrosion Index = %Cu + 3.3×%Cr + 20×%P
2. Special Notes
Equivalent Grades:
S355J2WP is the European designation for weathering steel, directly governed by EN 10025-5.
Nearly identical to Corten A (ASTM A588) but with stricter P/S limits (P≤0.035% vs. ASTM's ≤0.04%).
Certification:
Mills supply S355J2WP with EN 10204 3.1/3.2 certificates, explicitly stating compliance with EN 10025-5.
3. When to Verify Further
Despite compliance, confirm:
Batch-specific test reports (especially for coastal projects).
Weldability certifications if used in low-temperature applications.
