Steel S275N
EN S275N
S275N is a normalized fine-grain structural steel to EN 10025-3 (1.0490), also cross-referenced to Q275, offering 275 MPa class yield with guaranteed impact energy.
Reference datasheet — S275N 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
S275N tempers and conditions
S275N is supplied in 3 conditions, soft to hard. N is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
N heavy section | Use when specifying thick normalized plate; minimum yield falls with thickness per EN 10025-3. | 245 | 420 | 26 | 128 HB | 10.5 % IACS |
NDefault Normalized | Standard stocked condition for welded structures needing guaranteed toughness down to -20 °C. | 300 | 450 | 27 | 135 HB | 10.5 % IACS |
Normalized, low-temperature quality | Pick for cryogenic-ambient or arctic service and for pressure equipment requiring impact testing at -50 °C. | 300 | 450 | 28 | 132 HB | 10.5 % IACS |
What is S275N?
S275N is a normalized fine-grain structural steel to EN 10025-3 (1.0490), also cross-referenced to Q275, offering 275 MPa class yield with guaranteed impact energy. Engineers pick it for welded structures where the normalized condition improves toughness and through-thickness behaviour; it is supplied as plate and sections, including a heavy-thickness (N-HEAVY) option and the sub-zero NL variant. Typical values are 300 MPa yield, 450 MPa tensile, 27 % elongation and 135 HB. It has no corrosion resistance and must be coated; use S275NL for low-temperature service. S275N 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). S275N has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 86% of steel grades. Elongation at break is 27% and the elastic modulus is 210 GPa (30.5 Msi).
What is S275N used for?
- bridges
- steel structures
- offshore platforms
- welded fabrications
Advantages
- Readily welded — 92/100, better than 93% of steel grades
- High electrical conductivity — 10.5 % IACS, better than 89% of steel grades
- Easy to machine — 62/100, better than 89% of steel grades
- Ductile — tolerates forming and impact — 27%, better than 86% of steel grades
- Forms and bends easily — 70/100, better than 86% of steel grades
Limitations
- Low strength — 300 MPa (43.5 ksi), worse than 86% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
S275N properties
Typical room-temperature values for S275N-N; bars are the position among steel grades.
Physical3
S275N 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
S275N has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 86% of steel grades. Elongation at break is 27% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
S275N is rated for continuous service to 400°C (752 °F). It conducts heat at 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
S275N conducts electricity at 10.5 % IACS, better than 89% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of S275N takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 30%.
Manufacturability7
S275N's machinability is good (62/100, better than 89% of steel grades); weldability excellent (92/100); formability very good (70/100).
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. S275N is highlighted; hover a dot for its name, or open the interactive family chart.
Working with S275N
Is S275N easy to machine?
Machines like normalized C-Mn steel (~70 % of AISI 1212); use sharp HSS/carbide, moderate speeds and good chip breaking as gummy ferrite can smear.
Can S275N be welded?
Excellent weldability by SMAW/GMAW/SAW with matching C-Mn filler; CEV ≤0.40 means little or no preheat for t≤30 mm, keep heat input controlled to preserve normalized fine grain.
Can S275N be formed, bent or molded?
Cold bends readily to ~2–3 t bend radius with grain-favourable orientation; hot forming above 900 °C should be followed by re-normalizing to restore properties.
S275N 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 |
|---|---|---|
| Ct ≤ 63 mm | ≤ 0.18 | 0.15 |
| Si | ≤ 0.4 | 0.25 |
| Mn | 0.5 – 1.4 | 1.1 |
| PS275NL ≤0.025 | ≤ 0.03 | 0.02 |
| SS275NL ≤0.020 | ≤ 0.03 | 0.01 |
| Nlimit may be exceeded if sufficient N-binding elements present | ≤ 0.02 | 0.01 |
| Altotal Al; alternative N-binding elements permitted | ≥ 0.02 | 0.03 |
| Cr | ≤ 0.3 | 0.05 |
| Cu | ≤ 0.35 | 0.1 |
| Ni | ≤ 0.5 | 0.1 |
| Mo | ≤ 0.08 | 0.01 |
| NbNb+Ti+V ≤ 0.05 combined per EN 10025-3 | ≤ 0.05 | 0.02 |
| Ti | ≤ 0.05 | 0.01 |
| V | ≤ 0.05 | 0.01 |
| FeCEV ≤ 0.40 for t ≤ 63 mm | balance |
What surface finishes work on S275N?
Not anodizable — protect by shot blast plus paint, metallizing or hot-dip galvanizing (low Si keeps galvanized coating well behaved).
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 S275N in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.049010025-3
- Similar grades
- Q275
How much does S275N cost?
S275N 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.
S275N — frequently asked
What is S275N used for?
S275N is typically used for bridges, steel structures, offshore platforms and welded fabrications. In short: normalized structural workhorse; weldability rating 92; fine grain, better toughness.
What is the yield strength of S275N?
S275N has a typical yield strength of 300 MPa (43.5 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 86% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is S275N easy to machine?
Reasonably — machinability is rated good (62/100, better than 89% of steel grades). Machines like normalized C-Mn steel (~70 % of AISI 1212); use sharp HSS/carbide, moderate speeds and good chip breaking as gummy ferrite can smear.
Can S275N be welded?
Yes — weldability is rated excellent (92/100). Excellent weldability by SMAW/GMAW/SAW with matching C-Mn filler; CEV ≤0.40 means little or no preheat for t≤30 mm, keep heat input controlled to preserve normalized fine grain.
What surface finishes work on S275N?
Not anodizable — protect by shot blast plus paint, metallizing or hot-dip galvanizing (low Si keeps galvanized coating well behaved).
Can S275N be formed, bent or molded?
Cold bends readily to ~2–3 t bend radius with grain-favourable orientation; hot forming above 900 °C should be followed by re-normalizing to restore properties.
What is the maximum service temperature of S275N?
S275N 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 S275N-N and S275N N-HEAVY?
N is the default condition — standard stocked condition for welded structures needing guaranteed toughness down to -20 °C. N-HEAVY: use when specifying thick normalized plate; minimum yield falls with thickness per EN 10025-3. Yield strength is 300 MPa in N versus 245 MPa in N-HEAVY.
How much does S275N cost?
S275N 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 — Normalized/normalized rolled weldable fine grain structural steels — CEN (2019)
- EN 10027-2 / material number 1.0490 — CEN (2015)
- EN 1993-1-1 Eurocode 3 — design of steel structures (physical constants) — 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)
- Normalized fine-grain structural plate datasheets (S275N/S275NL) — European plate mills (2022)
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.