P355NL
1.0566Normalized pressure vessel steel with low-temperature toughness — ReH >=355 MPa, Charpy at -40°C (KV >=27J). "NL" = Normalized + Low-temperature. Used for pressure vessels, storage tanks, and process equipment operating in cold environments (LPG, cryogenic). EN 10028-3 + PED compliant.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇪🇺 | EN | Europe | P355NL1 / 1.0566 | 1.0566 | 100% |
Sources: EN 10028-3
Chemical composition comparison (wt%)
Side-by-side: P355NL (EN) (EN 10028-3) vs P355NL1 / 1.0566 (EN) (EN 10028-3)
| Element | P355NL (EN) | P355NL1 / 1.0566 (EN) | Overlap |
|---|---|---|---|
| C | 0–0.18% | 0–0.18% | OK |
| Si | 0–0.5% | 0–0.5% | OK |
| Mn | 1–1.7% | 1–1.7% | OK |
| Al | ≥ 0.02% | ≥ 0.02% | OK |
| Nb | 0–0.05% | 0–0.05% | OK |
Mechanical properties
Normalized
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 490–630 | MPa |
| Yield Strength | ≥ 355 | MPa |
| Elongation | ≥ 20 | % |
| charpy_impact_minus40 | ≥ 27 | J |
| Elastic Modulus | ≥ 210 | GPa |
| Density | ≥ 7.85 | g/cm3 |
Compatibility verdict
P355NL and P355NL1 / 1.0566: 100% composition match
Close equivalents but NOT identical.
Related materials
S355JR
1.0045High-strength low-alloy structural steel with minimum yield strength of 355 MPa. Standard grade for bridges, buildings, cranes, and general structural applications. Impact tested at +20°C (JR).
S690QL
1.8928High-strength quenched and tempered fine-grain structural steel with minimum yield strength of 690 MPa. Used for heavily loaded structures like mobile cranes, mining equipment, bridges, and pressure vessels.
S275JR
1.0044Medium-strength structural steel with minimum yield strength of 275 MPa. Bridges the gap between S235JR and S355JR. Used for general structural applications, lattice towers, masts, and light crane components. Impact tested at +20°C (JR).
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