Steel S355J0WP-AR
Heat-treated state · default condition
EN 1.8945 · also Corten A
Default stock condition: pick hot-rolled plate or coil with mill edge for weathering façades, sculpture, shipping containers and rail-vehicle panels at 380 MPa yield and 24 % elongation.
Values for the AR condition
Other S355J0WP tempers and conditions
S355J0WP is listed in 3 conditions; see the grade overview at S355J0WP.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Normalized | Choose normalized or normalizing-rolled material when thicker structural sections need uniform fine grain and better low-temperature toughness, trading a little yield (375 MPa) for 26 % elongation. | 375 | 505 | 26 | 145 HB | 8.6 % IACS |
ARDefaultThis page as hot rolled (hot-rolled plate/coil, mill edge) | Default stock condition: pick hot-rolled plate or coil with mill edge for weathering façades, sculpture, shipping containers and rail-vehicle panels at 380 MPa yield and 24 % elongation. | 380 | 510 | 24 | 150 HB | — |
Cold rolled | Pick cold-rolled, skin-passed sheet ≤3 mm for thin weathering panels and container side walls needing good surface and thickness accuracy, accepting 165 HB and only 20 % elongation. | 400 | 530 | 20 | 165 HB | 8.6 % IACS |
What is S355J0WP-AR?
S355J0WP-AR is S355J0WP heat treated to AR — default stock condition: pick hot-rolled plate or coil with mill edge for weathering façades, sculpture, shipping containers and rail-vehicle panels at 380 MPa yield and 24 % elongation. S355J0WP-AR has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 510 MPa (74 ksi) — weaker than 68% of steel grades. Elongation at break is 24% and the elastic modulus is 210 GPa (30.5 Msi). S355J0WP-AR has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,460°C (2,660 °F).
Advantages
- Good corrosion resistance — 35/100, better than 97% of steel grades
- Forms and bends easily — 70/100, better than 86% of steel grades
Limitations
- Hard to polish — 45/100, worse than 84% of steel grades
S355J0WP-AR properties
Typical room-temperature values for S355J0WP-AR; 11 are specific to this condition. Other listed values are S355J0WP reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
S355J0WP-AR has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,460°C (2,660 °F).
Mechanical16
S355J0WP-AR has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 510 MPa (74 ksi) — weaker than 68% of steel grades. Elongation at break is 24% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
S355J0WP-AR 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 µm/m·K (6.67 µin/in·°F).
Electrical3
S355J0WP-AR conducts electricity at 8.6 % IACS, better than 66% of steel grades.
Chemical & Environmental3
Corrosion resistance is fair (35/100), better than 97% of steel grades.
Sustainability4
Producing a kilogram of S355J0WP-AR 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
S355J0WP-AR's machinability is good (58/100, better than 75% of steel grades); weldability good (65/100); formability very good (70/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with S355J0WP-AR
Is S355J0WP easy to machine?
Comparable to ordinary HSLA structural steel (about 60 % of AISI 1212); coated carbide tooling at moderate cutting speeds is sufficient. The high phosphorus makes chips slightly brittle but gives good chip breaking.
Can S355J0WP be welded?
SMAW, GMAW and SAW are all usable with weathering-matched consumables such as E8018-W2 or ER80S-G. Because of the high phosphorus, control heat input and avoid highly restrained multi-pass joints; preheat 80–120 °C for thick plate or low ambient temperatures.
Can S355J0WP be formed, bent or molded?
Cold bending performance is good; sheet bend radii are normally 1.5–2.5 t, taking the larger value transverse to the rolling direction. Hot form at 900–1050 °C and avoid heavy deformation in the 200–500 °C range.
What surface finishes work on S355J0WP?
Natural wet/dry weathering or an acidic pre-rusting treatment is preferred. If painting is required, blast-clean thoroughly and use a weathering-compatible primer; do not leave the steel bare where water collects, in salt spray, or in direct contact with aluminium or galvanized parts.
S355J0WP 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 |
| Phigh P drives weathering resistance; limits weldability | 0.06 – 0.15 | 0.1 |
| S | ≤ 0.04 | 0.02 |
| Cr | 0.3 – 1.25 | 0.6 |
| Cu | 0.25 – 0.55 | 0.35 |
| Ni | ≤ 0.65 | 0.25 |
| Fe | balance | — |
S355J0WP-AR — frequently asked
What is S355J0WP-AR used for?
S355J0WP-AR is typically used for exposed architectural steel, railway wagons, outdoor sculptures and unpainted structural cladding. In short: classic Corten A equivalent; patinates without painting; thin-section weathering sheet.
What is the yield strength of S355J0WP-AR?
S355J0WP-AR has a typical yield strength of 380 MPa (55.1 ksi) and a tensile strength of 510 MPa (74 ksi) — weaker than 68% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is S355J0WP-AR easy to machine?
Reasonably — machinability is rated good (58/100, better than 75% of steel grades). Comparable to ordinary HSLA structural steel (about 60 % of AISI 1212); coated carbide tooling at moderate cutting speeds is sufficient. The high phosphorus makes chips slightly brittle but gives good chip breaking.
Can S355J0WP-AR be welded?
Yes — weldability is rated good (65/100). SMAW, GMAW and SAW are all usable with weathering-matched consumables such as E8018-W2 or ER80S-G. Because of the high phosphorus, control heat input and avoid highly restrained multi-pass joints; preheat 80–120 °C for thick plate or low ambient temperatures.
What surface finishes work on S355J0WP-AR?
Natural wet/dry weathering or an acidic pre-rusting treatment is preferred. If painting is required, blast-clean thoroughly and use a weathering-compatible primer; do not leave the steel bare where water collects, in salt spray, or in direct contact with aluminium or galvanized parts.
Can S355J0WP-AR be formed, bent or molded?
Cold bending performance is good; sheet bend radii are normally 1.5–2.5 t, taking the larger value transverse to the rolling direction. Hot form at 900–1050 °C and avoid heavy deformation in the 200–500 °C range.
What is the maximum service temperature of S355J0WP-AR?
S355J0WP-AR 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 S355J0WP-AR and S355J0WP-CR?
AR is the default condition — default stock condition: pick hot-rolled plate or coil with mill edge for weathering façades, sculpture, shipping containers and rail-vehicle panels at 380 MPa yield and 24 % elongation. CR: pick cold-rolled, skin-passed sheet ≤3 mm for thin weathering panels and container side walls needing good surface and thickness accuracy, accepting 165 HB and only 20 % elongation. Yield strength is 380 MPa in AR versus 400 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 / Q355NH) — SAC (2008)
- ASTM G101 Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels — ASTM (2020)
- ASM Handbook Vol. 1: Properties and Selection — Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Weathering steel (Corten A / S355J0WP) product datasheet — European/Chinese mill datasheets (2023)
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.