Steel S355J2WP +N (Normalized)
Heat-treated state
EN 1.8946 · also Corten A
Choose when uniform fine-grain structure and reliable low-temperature toughness margin above the 27 J/−20 °C minimum are required.
Values for the +N condition
Other S355J2WP tempers and conditions
S355J2WP is listed in 3 conditions; see the grade overview at S355J2WP.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
+NThis page Normalized | Choose when uniform fine-grain structure and reliable low-temperature toughness margin above the 27 J/−20 °C minimum are required. | 385 | 525 | 26 | 150 HB | 7.5 % IACS |
+ARDefault Hot rolled | Default stock condition for weathering plate, coil and strip up to ~12–16 mm; pick unless a normalized certificate is demanded. | 390 | 530 | 24 | 155 HB | 7.5 % IACS |
Cold rolled | Sub-3 mm decorative sheet for facade panels and signage; higher strength, reduced ductility, needs care on tight bends. | 440 | 570 | 18 | 175 HB | 7.5 % IACS |
What is S355J2WP +N?
S355J2WP +N is S355J2WP heat treated to +N — choose when uniform fine-grain structure and reliable low-temperature toughness margin above the 27 J/−20 °C minimum are required. S355J2WP +N has a yield strength of 385 MPa (55.8 ksi) and a tensile strength of 525 MPa (76.1 ksi) — weaker than 65% of steel grades. Elongation at break is 26% and the elastic modulus is 210 GPa (30.5 Msi). S355J2WP +N has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F). +AR is the default condition FabDigit quotes; +N is available on request or by drawing note.
Advantages
- Good corrosion resistance — 35/100, better than 97% of steel grades
- Easy to machine — 64/100, better than 92% of steel grades
- Forms and bends easily — 74/100, better than 89% of steel grades
- Ductile — tolerates forming and impact — 26%, better than 82% of steel grades
- Tough — resists crack growth — 120 MPa·√m (109.2 ksi·√in), better than 81% of steel grades
Limitations
- Hard to polish — 40/100, worse than 96% of steel grades
S355J2WP +N properties
Typical room-temperature values for S355J2WP +N; 22 are specific to this condition. Other listed values are S355J2WP reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
S355J2WP +N has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F).
Mechanical16
S355J2WP +N has a yield strength of 385 MPa (55.8 ksi) and a tensile strength of 525 MPa (76.1 ksi) — weaker than 65% of steel grades. Elongation at break is 26% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
S355J2WP +N is rated for continuous service to 350°C (662 °F). It conducts heat at 45 W/m·K (26 BTU/hr·ft·°F), better than 66% of steel grades. Thermal expansion is 12.2 µm/m·K (6.78 µin/in·°F).
Electrical3
S355J2WP +N conducts electricity at 7.5 % IACS, worse than 67% of steel grades.
Chemical & Environmental3
Corrosion resistance is fair (35/100), better than 97% of steel grades.
Sustainability4
Producing a kilogram of S355J2WP +N takes about 25 MJ of energy and emits 2.1 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability7
S355J2WP +N's machinability is good (64/100, better than 92% of steel grades); weldability fair (52/100); formability very good (74/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with S355J2WP +N
Is S355J2WP easy to machine?
Machines like a 355 MPa HSLA steel; high phosphorus gives clean chip breaking, but tool wear rises slightly from Cr/Cu — use coated carbide, moderate speeds, generous coolant.
Can S355J2WP be welded?
Weldable in thin sections only — the 0.06–0.15 % P raises hot-cracking risk, so keep heat input low, use low-hydrogen or matching Cr-Cu-Ni weathering consumables (e.g. E8018-W2 / 09CuPCrNi wire) and avoid heavy multi-pass restrained joints; single-pass fillets in ≤12 mm are the normal envelope.
Can S355J2WP be formed, bent or molded?
Good cold bending and roll forming in coil and ≤12 mm plate; keep bend radius ≥2t (≥2.5t transverse) and deburr edges, as P-rich steel is notch sensitive at low temperature.
What surface finishes work on S355J2WP?
Normally left bare to develop the patina (allow free drainage, no water traps, avoid contact with unprotected Al/Zn and de-icing salt); factory pre-rusting or wax/sealer limits runoff staining, and it also paints/powder-coats well after blast cleaning.
S355J2WP chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| CEN 10025-5 max | ≤ 0.12 | 0.09 |
| Si | ≤ 0.75 | 0.35 |
| Mn | ≤ 1 | 0.45 |
| Pdeliberate high P for patina formation; restricts weldability | 0.06 – 0.15 | 0.09 |
| S | ≤ 0.04 | 0.02 |
| Cu | 0.25 – 0.55 | 0.4 |
| Cr | 0.3 – 1.25 | 0.65 |
| Ni | ≤ 0.65 | 0.25 |
| Fe | balance | — |
S355J2WP +N — frequently asked
What is S355J2WP +N used for?
S355J2WP +N is typically used for exposed structural steelwork in cold climates, bridges, railway hopper cars and architectural facades. In short: −20 °C weathering steel; cold-climate Corten A variant; thin sections only when welded.
What is the yield strength of S355J2WP +N?
S355J2WP +N has a typical yield strength of 385 MPa (55.8 ksi) and a tensile strength of 525 MPa (76.1 ksi) — weaker than 65% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is S355J2WP +N easy to machine?
Reasonably — machinability is rated good (64/100, better than 92% of steel grades). Machines like a 355 MPa HSLA steel; high phosphorus gives clean chip breaking, but tool wear rises slightly from Cr/Cu — use coated carbide, moderate speeds, generous coolant.
Can S355J2WP +N be welded?
With care — weldability is rated fair (52/100). Weldable in thin sections only — the 0.06–0.15 % P raises hot-cracking risk, so keep heat input low, use low-hydrogen or matching Cr-Cu-Ni weathering consumables (e.g. E8018-W2 / 09CuPCrNi wire) and avoid heavy multi-pass restrained joints; single-pass fillets in ≤12 mm are the normal envelope.
What surface finishes work on S355J2WP +N?
Normally left bare to develop the patina (allow free drainage, no water traps, avoid contact with unprotected Al/Zn and de-icing salt); factory pre-rusting or wax/sealer limits runoff staining, and it also paints/powder-coats well after blast cleaning.
Can S355J2WP +N be formed, bent or molded?
Good cold bending and roll forming in coil and ≤12 mm plate; keep bend radius ≥2t (≥2.5t transverse) and deburr edges, as P-rich steel is notch sensitive at low temperature.
What is the maximum service temperature of S355J2WP +N?
S355J2WP +N is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between S355J2WP +AR and S355J2WP-CR?
+AR is the default condition — default stock condition for weathering plate, coil and strip up to ~12–16 mm; pick unless a normalized certificate is demanded. CR: sub-3 mm decorative sheet for facade panels and signage; higher strength, reduced ductility, needs care on tight bends. Yield strength is 390 MPa in +AR versus 440 MPa in CR.
Sources
- EN 10025-5 — Hot rolled products of structural steels: technical delivery conditions for structural steels with improved atmospheric corrosion resistance — CEN (2019)
- GB/T 4171 — (09CuPCrNi-A) — SAC (2008)
- Weathering steel (Corten A/B) plate and coil datasheets — ArcelorMittal / SSAB / Baosteel (2022)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.13 — Corrosion (atmospheric corrosion of weathering steels) — ASM International (2005)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.