Steel S275NL
EN S275NL
S275NL is the low-temperature grade of the S275 normalized fine-grain structural family to EN 10025-3 (1.0491), guaranteeing impact energy at sub-zero test temperatures down to −50 °C.
Reference datasheet — S275NL is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the N condition
S275NL tempers and conditions
S275NL is supplied in 9 conditions, soft to hard. N is the default FabDigit quotes; the values on this page are for it.
Compare all 9 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
+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?
S275NL is the low-temperature grade of the S275 normalized fine-grain structural family to EN 10025-3 (1.0491), guaranteeing impact energy at sub-zero test temperatures down to −50 °C. It is specified for welded offshore and cold-climate structures and is supplied as normalized plate in thickness bands from 16 mm to 250 mm, with Z35 through-thickness testing available. Typical values are 320 MPa yield, 450 MPa tensile, 29 % elongation and 145 HB, with CEV ≤ 0.40 for straightforward welding. It has no inherent corrosion resistance; use S275N where sub-zero toughness is not required. S275NL 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). S275NL has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 81% of steel grades. Elongation at break is 29% and the elastic modulus is 210 GPa (30.5 Msi).
What is S275NL used for?
- offshore structures
- cold-region bridges
- steel frameworks
- welded structural members
Advantages
- Tough — resists crack growth — 140 MPa·√m (127.4 ksi·√in), better than 94% of steel grades
- Readily welded — 92/100, better than 93% of steel grades
- Ductile — tolerates forming and impact — 29%, better than 91% of steel grades
- Easy to machine — 62/100, better than 89% of steel grades
- Forms and bends easily — 72/100, better than 88% of steel grades
Limitations
- Hard to polish — 40/100, worse than 96% of steel grades
- Low strength — 320 MPa (46.4 ksi), worse than 81% of steel grades
S275NL properties
Typical room-temperature values for S275NL-N; bars are the position among steel grades.
Physical3
S275NL 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 has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 81% of steel grades. Elongation at break is 29% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
S275NL 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 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 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's machinability is good (62/100, better than 89% of steel grades); weldability excellent (92/100); formability very good (72/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the steel family
Yield strength against density for every steel grade FabDigit runs. S275NL is highlighted; hover a dot for its name, or open the interactive family chart.
Working with S275NL
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.
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 |
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.
Surface treatments FabDigit runs on steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel S275NL in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.049110025-3
How much does S275NL cost?
S275NL is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
S275NL — frequently asked
What is S275NL used for?
S275NL 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?
S275NL has a typical yield strength of 320 MPa (46.4 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 81% of steel grades. Strength varies by condition: see the 9 listed tempers.
Is S275NL easy to machine?
Reasonably — machinability is rated good (62/100, better than 89% 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 be welded?
Yes — weldability is rated excellent (92/100). 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?
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 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?
S275NL 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.
How much does S275NL cost?
S275NL is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
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; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.