Steel S275J2
EN S275J2
S275J2 is a carbon-manganese non-alloy structural steel to EN 10025-2 (1.0145, also listed as St44-3N and Q275), supplied with guaranteed 27 J impact energy at -20 °C.
Reference datasheet — S275J2 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 +AR condition
S275J2 tempers and conditions
S275J2 is supplied in 5 conditions, soft to hard. +AR is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Used after heavy cold work or fabrication to restore ductility and relieve residual stress before machining or forming. | 270 | 420 | 28 | 120 HB | 10.5 % IACS |
Normalized | Choose for thicker plate or where uniform fine grain and reliable low-temperature toughness through the thickness are required. | 295 | 450 | 25 | 130 HB | 10 % IACS |
+ARDefault Hot rolled | Standard stocked condition for plate, sections and bar where no special microstructure is required. | 300 | 460 | 23 | 135 HB | 10 % IACS |
Thermomechanically controlled processed | Occasional delivery condition for plate where low carbon equivalent and best weldability at a given thickness are wanted. | 300 | 450 | 26 | 132 HB | 10 % IACS |
Cold drawn | Pick for close-tolerance bar and shafting; higher strength and hardness but reduced ductility and residual stress. | 450 | 560 | 12 | 170 HB | 9.5 % IACS |
What is S275J2?
S275J2 is a carbon-manganese non-alloy structural steel to EN 10025-2 (1.0145, also listed as St44-3N and Q275), supplied with guaranteed 27 J impact energy at -20 °C. Engineers specify it for welded structures that need both strength and cold-weather toughness; usual forms are plate, hot-rolled sections, bar and hollow sections in +AR, +N or +M, with about 300 MPa yield, 460 MPa tensile, 23 % elongation and 135 HB. It has no corrosion resistance bare and must be coated. S355J2 is the normal step up when higher yield is needed at the same toughness class. S275J2 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). S275J2 has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 460 MPa (66.7 ksi) — weaker than 86% of steel grades. Elongation at break is 23% and the elastic modulus is 210 GPa (30.5 Msi).
What is S275J2 used for?
- bridges
- structural steel members
- heavy equipment frames
- outdoor construction
Advantages
- Easy to machine — 68/100, better than 95% of steel grades
- Readily welded — 92/100, better than 93% of steel grades
- Forms and bends easily — 72/100, better than 88% of steel grades
- Conducts heat well — 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% of steel grades
- High electrical conductivity — 10 % IACS, better than 83% 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
S275J2 properties
Typical room-temperature values for S275J2-+AR; bars are the position among steel grades.
Physical3
S275J2 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
S275J2 has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 460 MPa (66.7 ksi) — weaker than 86% of steel grades. Elongation at break is 23% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
S275J2 is rated for continuous service to 350°C (662 °F). It conducts heat at 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
S275J2 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 S275J2 takes about 25 MJ of energy and emits 2.2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 30%.
Manufacturability7
S275J2's machinability is good (68/100, better than 95% 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. S275J2 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with S275J2
Is S275J2 easy to machine?
Machines like ordinary hot-rolled C-Mn steel (~65 % of AISI 1212); gummy chips in the as-rolled state — use positive-rake carbide, moderate speeds and good coolant.
Can S275J2 be welded?
Excellent weldability by SMAW/GMAW/SAW with low-hydrogen consumables; CEV ≈ 0.40 means little or no preheat below ~30 mm, preheat 100–150 °C for thick or restrained joints.
Can S275J2 be formed, bent or molded?
Readily cold-bent and press-braked (min bend radius ≈ 1–1.5 t transverse); hot forming at 900–1150 °C followed by normalizing restores toughness.
S275J2 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 |
|---|---|---|
| C≤0.18 % for t ≤ 40 mm; up to 0.21 % for heavier product per EN 10025-2 | ≤ 0.18 | 0.15 |
| Sinot specified by standard; fully killed steel, typical 0.15–0.35 % | ≈ 0.2 | 0.2 |
| Mn | ≤ 1.5 | 1.1 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.03 | 0.01 |
| Cu | ≤ 0.55 | 0.2 |
| Nno N limit for J2 quality (steel contains sufficient nitrogen-binding elements) | ≈ 0.01 | 0.01 |
| CEVcarbon equivalent, t ≤ 30 mm; 0.42–0.45 for heavier thicknesses | ≤ 0.4 | 0.36 |
| Fe | balance |
What surface finishes work on S275J2?
No anodizing; protect by hot-dip galvanizing, zinc-rich or epoxy primer plus topcoat, or phosphate/oil for short-term storage — bare surfaces rust within days.
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 S275J2 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.0145
- Similar grades
- St44-3NQ275
How much does S275J2 cost?
S275J2 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.
S275J2 — frequently asked
What is S275J2 used for?
S275J2 is typically used for bridges, structural steel members, heavy equipment frames and outdoor construction. In short: cold-tough structural steel; 27 J at -20 °C; highly weldable, CEV ~0.40.
What is the yield strength of S275J2?
S275J2 has a typical yield strength of 300 MPa (43.5 ksi) and a tensile strength of 460 MPa (66.7 ksi) — weaker than 86% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is S275J2 easy to machine?
Reasonably — machinability is rated good (68/100, better than 95% of steel grades). Machines like ordinary hot-rolled C-Mn steel (~65 % of AISI 1212); gummy chips in the as-rolled state — use positive-rake carbide, moderate speeds and good coolant.
Can S275J2 be welded?
Yes — weldability is rated excellent (92/100). Excellent weldability by SMAW/GMAW/SAW with low-hydrogen consumables; CEV ≈ 0.40 means little or no preheat below ~30 mm, preheat 100–150 °C for thick or restrained joints.
What surface finishes work on S275J2?
No anodizing; protect by hot-dip galvanizing, zinc-rich or epoxy primer plus topcoat, or phosphate/oil for short-term storage — bare surfaces rust within days.
Can S275J2 be formed, bent or molded?
Readily cold-bent and press-braked (min bend radius ≈ 1–1.5 t transverse); hot forming at 900–1150 °C followed by normalizing restores toughness.
What is the maximum service temperature of S275J2?
S275J2 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 S275J2 +AR and S275J2-CD?
+AR is the default condition — standard stocked condition for plate, sections and bar where no special microstructure is required. CD: pick for close-tolerance bar and shafting; higher strength and hardness but reduced ductility and residual stress. Yield strength is 300 MPa in +AR versus 450 MPa in CD.
How much does S275J2 cost?
S275J2 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 10025-2 Hot rolled products of structural steels — Non-alloy structural steels — CEN (2019)
- EN 10027-2 Designation systems for steels — Steel numbers (1.0145) — CEN (2015)
- EN 1993-1-1 Eurocode 3: Design of steel structures — CEN (2005)
- GB/T 700 (Q275) — SAC (2006)
- ASM Handbook Vol.1: Properties and Selection — Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.13A: Corrosion — ASM International (2003)
- Structural steel plate S275 grade datasheets — European mill datasheets (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.