Steel S235J0W t16-40
Grade
EN 1.8958
t16-40 = thickness 16–40 mm
Use these values when the section thickness exceeds 16 mm — EN 10025-5 steps the guaranteed yield down.
Values for the t16-40 condition
Other S235J0W tempers and conditions
S235J0W is listed in 4 conditions; see the grade overview at S235J0W.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Thickness >40–100 mm | Heavy plate class, normally supplied +N; lowest guaranteed yield and slightly lower toughness. | 230 | 400 | 26 | 120 HB | 8 % IACS |
t16-40This page Thickness 16–40 mm | Use these values when the section thickness exceeds 16 mm — EN 10025-5 steps the guaranteed yield down. | 245 | 420 | 28 | 126 HB | 8 % IACS |
+ARDefault Hot rolled | Standard stocked condition for weathering plate, coil and sections up to moderate thickness; cheapest and adequate for 0 °C toughness. | 260 | 430 | 28 | 130 HB | — |
Normalized | Choose for thicker plate or where a fine, uniform grain and more consistent through-thickness toughness are specified. | 265 | 420 | 30 | 125 HB | 8 % IACS |
What is S235J0W t16-40?
S235J0W t16-40 is S235J0W in the t16-40 grade — use these values when the section thickness exceeds 16 mm — EN 10025-5 steps the guaranteed yield down. S235J0W t16-40 has a yield strength of 245 MPa (35.5 ksi) and a tensile strength of 420 MPa (60.9 ksi) — weaker than 95% of steel grades. Elongation at break is 28% and the elastic modulus is 210 GPa (30.5 Msi). S235J0W t16-40 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). +AR is the default condition FabDigit quotes; t16-40 is available on request or by drawing note.
Advantages
- Good corrosion resistance — 30/100, better than 95% of steel grades
- Forms and bends easily — 78/100, better than 91% of steel grades
- Ductile — tolerates forming and impact — 28%, better than 89% of steel grades
- Easy to machine — 62/100, better than 89% of steel grades
- Readily welded — 88/100, better than 87% of steel grades
Limitations
- Low strength — 245 MPa (35.5 ksi), worse than 95% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
- Low fracture toughness — 65 MPa·√m (59.2 ksi·√in), worse than 75% of steel grades
S235J0W t16-40 properties
Typical room-temperature values for S235J0W t16-40; 22 are specific to this condition. Other listed values are S235J0W reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
S235J0W t16-40 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
S235J0W t16-40 has a yield strength of 245 MPa (35.5 ksi) and a tensile strength of 420 MPa (60.9 ksi) — weaker than 95% of steel grades. Elongation at break is 28% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
S235J0W t16-40 is rated for continuous service to 350°C (662 °F). It conducts heat at 44 W/m·K (25.4 BTU/hr·ft·°F), better than 57% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
S235J0W t16-40 conducts electricity at 8 % IACS, better than 55% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (30/100), better than 95% of steel grades.
Sustainability4
Producing a kilogram of S235J0W t16-40 takes about 25 MJ of energy and emits 2.1 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability8
S235J0W t16-40's machinability is good (62/100, better than 89% of steel grades); weldability excellent (88/100); formability very good (78/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with S235J0W t16-40
Is S235J0W easy to machine?
Machines like ordinary low-carbon structural steel (~65 % of AISI 1212); slightly gummy, so use sharp positive-rake tooling and generous feed to avoid built-up edge.
Can S235J0W be welded?
Excellent weldability by SMAW/GMAW/SAW with low CEV; for unpainted work use a matching Cu-Cr weathering filler (e.g. EN ISO 14341 G 42 with Ni/Cu or Corten-type consumables) so the weld patinates at the same rate.
Can S235J0W be formed, bent or molded?
Good cold bendability in +AR/+N (bend radius ≥ 2t for thin plate); hot form at 900–1050 °C and avoid finishing below ~850 °C, then normalize if toughness is critical.
What surface finishes work on S235J0W?
Usually left bare to develop the patina under wet/dry cycling (blast-clean and remove mill scale first for even colour); if coated, use standard blast + epoxy/polyurethane systems, and detail drainage so early rust run-off does not stain adjacent concrete or glass.
S235J0W 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, all thicknesses | ≤ 0.13 | 0.09 |
| Si | ≤ 0.4 | 0.3 |
| Mn | 0.2 – 0.6 | 0.45 |
| Plong products slightly higher limit | ≤ 0.04 | 0.02 |
| S | ≤ 0.04 | 0.02 |
| Crpatina former | 0.4 – 0.8 | 0.6 |
| Cupatina former | 0.25 – 0.55 | 0.35 |
| Ni | ≤ 0.65 | 0.15 |
| Nmay be exceeded if N-binding elements present | ≤ 0.01 | 0.01 |
| Fe | balance | — |
S235J0W t16-40 — frequently asked
What is S235J0W t16-40 used for?
S235J0W t16-40 is typically used for light structural weathering applications, fencing and guardrails and outdoor equipment housings. In short: easiest-welding weathering steel; lowest-cost weathering grade; S235 strength class.
What is the yield strength of S235J0W t16-40?
S235J0W t16-40 has a typical yield strength of 245 MPa (35.5 ksi) and a tensile strength of 420 MPa (60.9 ksi) — weaker than 95% of steel grades. Strength varies by condition: see the 4 listed tempers.
Is S235J0W t16-40 easy to machine?
Reasonably — machinability is rated good (62/100, better than 89% of steel grades). Machines like ordinary low-carbon structural steel (~65 % of AISI 1212); slightly gummy, so use sharp positive-rake tooling and generous feed to avoid built-up edge.
Can S235J0W t16-40 be welded?
Yes — weldability is rated excellent (88/100). Excellent weldability by SMAW/GMAW/SAW with low CEV; for unpainted work use a matching Cu-Cr weathering filler (e.g. EN ISO 14341 G 42 with Ni/Cu or Corten-type consumables) so the weld patinates at the same rate.
What surface finishes work on S235J0W t16-40?
Usually left bare to develop the patina under wet/dry cycling (blast-clean and remove mill scale first for even colour); if coated, use standard blast + epoxy/polyurethane systems, and detail drainage so early rust run-off does not stain adjacent concrete or glass.
Can S235J0W t16-40 be formed, bent or molded?
Good cold bendability in +AR/+N (bend radius ≥ 2t for thin plate); hot form at 900–1050 °C and avoid finishing below ~850 °C, then normalize if toughness is critical.
What is the maximum service temperature of S235J0W t16-40?
S235J0W t16-40 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 S235J0W +AR and S235J0W t40-100?
+AR is the default condition — standard stocked condition for weathering plate, coil and sections up to moderate thickness; cheapest and adequate for 0 °C toughness. t40-100: heavy plate class, normally supplied +N; lowest guaranteed yield and slightly lower toughness. Yield strength is 260 MPa in +AR versus 230 MPa in t40-100.
Sources
- EN 10025-5: Hot rolled products of structural steels — Technical delivery conditions for structural steels with improved atmospheric corrosion resistance — CEN (2019)
- ASTM A242/A606 — High-strength low-alloy structural steel with atmospheric corrosion resistance — ASTM (2022)
- GB/T 4171 (Q235NH) — SAC (2008)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.13C — Corrosion: Environments and Industries (weathering steels) — ASM International (2006)
- EN 1993-1-1 Eurocode 3 — Design of steel structures (elastic constants, CTE) — CEN (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.