S355J2
Data verifiedS355J2 is Europe’s structural HSLA steel (EN 10025-2), the benchmark for welded structures, machinery and pipe where −20 °C toughness is specified.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.20 |
| Si | ≤0.55 |
| Mn | ≤1.60 |
| P | ≤0.025 |
| S | ≤0.025 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Yield strength | ≥355 MPa (≤16 mm) |
| Tensile strength | 470–630 MPa |
| Impact | J2: −20 °C, ≥27 J |
| Density | 7.85 g/cm³ |
Heat treatment
Hot rolled or normalized (+N); no hardening.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.0577 (S355J2) / 1.0570 legacy St52-3 |
| aisi | A572 Gr.50 (near) |
| jis | SM490B (near) |
| gb | Q345B (near) |
Compare side by side: S355J2 vs Q345B / 16Mn
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Structures, machinery, cranes, structural hollow sections and pipe.
Processing: Excellent weldability with controlled CEV; the reference grade for EU construction specs.
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Ask for a quotationVisit NasteelSource: EN 10025-2 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.