Steel S275NL N-200-250
Heat-treated state
EN S275NL
N-200-250 = +N
Maximum thickness covered by EN 10025-3; ReH min 205 MPa, agreement on toughness sampling required.
Values for the N-200-250 condition
Other S275NL tempers and conditions
S275NL is listed in 9 conditions; see the grade overview at S275NL.
Compare all 9 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
N-200-250This page +N | Maximum thickness covered by EN 10025-3; ReH min 205 MPa, agreement on toughness sampling required. | 245 | 405 | 25 | 128 HB | 10 % IACS |
+N | Mill-order-only heavy plate; ReH min 215 MPa, impact tests taken at quarter thickness. | 255 | 410 | 26 | 130 HB | 10 % IACS |
+N | Very heavy plate; tensile band drops to 350–480 MPa and ReH min to 225 MPa. | 265 | 415 | 26 | 132 HB | 10 % IACS |
+N | ReH min 235 MPa; through-thickness properties should be specified for cruciform welds. | 275 | 430 | 27 | 136 HB | 10 % IACS |
+N | Thick plate; ReH min 245 MPa, use when section thickness governs design. | 285 | 435 | 27 | 138 HB | 10 % IACS |
+N | Heavy plate for welded girders; ReH min 255 MPa, CEV limit relaxes slightly. | 295 | 440 | 28 | 140 HB | 10 % IACS |
+N | Medium plate thickness; yield minimum steps down to 265 MPa. | 305 | 445 | 28 | 143 HB | 10 % IACS |
NDefault Normalized | Standard supply condition for plate, strip and sections up to 16 mm; full 275 MPa yield and -50 °C toughness. | 320 | 450 | 29 | 145 HB | 10 % IACS |
+N with Z35 through-thickness quality | Choose when the plate carries tensile load through its thickness (cruciform/T-joints) and lamellar tearing must be excluded. | 320 | 450 | 28 | 145 HB | 10 % IACS |
What is S275NL N-200-250?
S275NL N-200-250 is S275NL heat treated to N-200-250 — maximum thickness covered by EN 10025-3; ReH min 205 MPa, agreement on toughness sampling required. S275NL N-200-250 has a yield strength of 245 MPa (35.5 ksi) and a tensile strength of 405 MPa (58.7 ksi) — weaker than 95% of steel grades. Elongation at break is 25% and the elastic modulus is 210 GPa (30.5 Msi). S275NL N-200-250 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F). N is the default condition FabDigit quotes; N-200-250 is available on request or by drawing note.
Advantages
- Easy to machine — 63/100, better than 92% of steel grades
- Readily welded — 86/100, better than 85% of steel grades
- High electrical conductivity — 10 % IACS, better than 83% of steel grades
- Ductile — tolerates forming and impact — 25%, better than 77% of steel grades
- Tough — resists crack growth — 115 MPa·√m (104.7 ksi·√in), better than 77% of steel grades
Limitations
- Hard to polish — 40/100, worse than 96% of steel grades
- Low strength — 245 MPa (35.5 ksi), worse than 95% of steel grades
S275NL N-200-250 properties
Typical room-temperature values for S275NL N-200-250; 22 are specific to this condition. Other listed values are S275NL reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
S275NL N-200-250 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical16
S275NL N-200-250 has a yield strength of 245 MPa (35.5 ksi) and a tensile strength of 405 MPa (58.7 ksi) — weaker than 95% of steel grades. Elongation at break is 25% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
S275NL N-200-250 is rated for continuous service to 400°C (752 °F). It conducts heat at 47 W/m·K (27.2 BTU/hr·ft·°F), better than 75% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
S275NL N-200-250 conducts electricity at 10 % IACS, better than 83% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of S275NL N-200-250 takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 30%.
Manufacturability7
S275NL N-200-250's machinability is good (63/100, better than 92% of steel grades); weldability excellent (86/100); formability good (58/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with S275NL N-200-250
Is S275NL easy to machine?
Machines like a normalized C-Mn steel (~68 % of AISI 1212): free-cutting is poor but chip control is good with sharp carbide tooling and moderate feeds; avoid smearing at low speeds.
Can S275NL be welded?
Excellent weldability with CEV ≤ 0.40 — SMAW/GMAW/SAW with basic low-hydrogen consumables matched to -50 °C toughness; preheat generally only for thick sections or high restraint per EN 1011-2.
Can S275NL be formed, bent or molded?
Good cold bending and rolling in the normalized state (typical bend radius 1.5–2×t); hot forming above 580 °C must be followed by re-normalizing to restore fine grain and low-temperature toughness.
What surface finishes work on S275NL?
No anodizing; protect by shot blasting to Sa 2.5 then epoxy/PU paint systems, hot-dip galvanizing (watch Si-Mn reactivity) or thermal-sprayed zinc for offshore/cold-climate service.
S275NL 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 |
|---|---|---|
| Cladle analysis, all thicknesses | ≤ 0.16 | 0.13 |
| Si | ≤ 0.4 | 0.25 |
| Mn | 0.5 – 1.4 | 1.1 |
| PNL grade, tighter than S275N | ≤ 0.03 | 0.02 |
| SNL grade | ≤ 0.02 | 0.01 |
| Nmay be exceeded if sufficient N-binding elements present | ≤ 0.02 | 0.01 |
| Altotal Al, grain refinement | ≥ 0.02 | 0.03 |
| Nb | ≤ 0.05 | 0.02 |
| V | ≤ 0.05 | 0.02 |
| TiNb+V+Ti ≤ 0.05 combined per standard note | ≤ 0.05 | 0.02 |
| Cr | ≤ 0.3 | 0.05 |
| Ni | ≤ 0.3 | 0.1 |
| Mo | ≤ 0.1 | 0.02 |
| Cu | ≤ 0.35 | 0.1 |
| CEVcarbon equivalent, t ≤ 63 mm; 0.42 for thicker product | ≤ 0.4 | 0.36 |
| Fe | balance | — |
S275NL N-200-250 — frequently asked
What is S275NL N-200-250 used for?
S275NL N-200-250 is typically used for offshore structures, cold-region bridges, steel frameworks and welded structural members. In short: sub-zero structural S275; impact energy to −50 °C; plate up to 250 mm.
What is the yield strength of S275NL N-200-250?
S275NL N-200-250 has a typical yield strength of 245 MPa (35.5 ksi) and a tensile strength of 405 MPa (58.7 ksi) — weaker than 95% of steel grades. Strength varies by condition: see the 9 listed tempers.
Is S275NL N-200-250 easy to machine?
Reasonably — machinability is rated good (63/100, better than 92% of steel grades). Machines like a normalized C-Mn steel (~68 % of AISI 1212): free-cutting is poor but chip control is good with sharp carbide tooling and moderate feeds; avoid smearing at low speeds.
Can S275NL N-200-250 be welded?
Yes — weldability is rated excellent (86/100). Excellent weldability with CEV ≤ 0.40 — SMAW/GMAW/SAW with basic low-hydrogen consumables matched to -50 °C toughness; preheat generally only for thick sections or high restraint per EN 1011-2.
What surface finishes work on S275NL N-200-250?
No anodizing; protect by shot blasting to Sa 2.5 then epoxy/PU paint systems, hot-dip galvanizing (watch Si-Mn reactivity) or thermal-sprayed zinc for offshore/cold-climate service.
Can S275NL N-200-250 be formed, bent or molded?
Good cold bending and rolling in the normalized state (typical bend radius 1.5–2×t); hot forming above 580 °C must be followed by re-normalizing to restore fine grain and low-temperature toughness.
What is the maximum service temperature of S275NL N-200-250?
S275NL N-200-250 is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between S275NL-N and S275NL N-63-80?
N is the default condition — standard supply condition for plate, strip and sections up to 16 mm; full 275 MPa yield and -50 °C toughness. N-63-80: thick plate; ReH min 245 MPa, use when section thickness governs design. Yield strength is 320 MPa in N versus 285 MPa in N-63-80.
Sources
- EN 10025-3: Hot rolled products of structural steels — Part 3: Normalized/normalized rolled weldable fine grain structural steels — CEN (2019)
- EN 10164: Steel products with improved deformation properties perpendicular to the surface — CEN (2018)
- EN 1993-1-1 Eurocode 3 — Design of steel structures — CEN (2005)
- ASM Handbook Vol.1: Properties and Selection — Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.19: Fatigue and Fracture — ASM International (1996)
- European heavy-plate mill datasheets for S275N/NL normalized structural plate — Mill datasheets (Dillinger / Voestalpine / SSAB) (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.