Steel S275J2-ANN (Annealed)
Heat-treated state
EN S275J2
Used after heavy cold work or fabrication to restore ductility and relieve residual stress before machining or forming.
Values for the ANN condition
Other S275J2 tempers and conditions
S275J2 is listed in 5 conditions; see the grade overview at S275J2.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ANNThis page 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-ANN?
S275J2-ANN is S275J2 heat treated to ANN — used after heavy cold work or fabrication to restore ductility and relieve residual stress before machining or forming. S275J2-ANN has a yield strength of 270 MPa (39.2 ksi) and a tensile strength of 420 MPa (60.9 ksi) — weaker than 91% of steel grades. Elongation at break is 28% and the elastic modulus is 210 GPa (30.5 Msi). S275J2-ANN 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; ANN is available on request or by drawing note.
Advantages
- Conducts heat well — 52 W/m·K (30 BTU/hr·ft·°F), better than 98% of steel grades
- Readily welded — 94/100, better than 95% of steel grades
- Forms and bends easily — 82/100, better than 94% of steel grades
- Easy to machine — 64/100, better than 92% of steel grades
- Ductile — tolerates forming and impact — 28%, better than 89% of steel grades
Limitations
- Low strength — 270 MPa (39.2 ksi), worse than 91% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
S275J2-ANN properties
Typical room-temperature values for S275J2-ANN; 22 are specific to this condition. Other listed values are S275J2 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
S275J2-ANN 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-ANN has a yield strength of 270 MPa (39.2 ksi) and a tensile strength of 420 MPa (60.9 ksi) — weaker than 91% of steel grades. Elongation at break is 28% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
S275J2-ANN is rated for continuous service to 350°C (662 °F). It conducts heat at 52 W/m·K (30 BTU/hr·ft·°F), better than 98% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
S275J2-ANN 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 S275J2-ANN 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-ANN's machinability is good (64/100, better than 92% of steel grades); weldability excellent (94/100); formability very good (82/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with S275J2-ANN
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.
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.
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 | — |
S275J2-ANN — frequently asked
What is S275J2-ANN used for?
S275J2-ANN 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-ANN?
S275J2-ANN has a typical yield strength of 270 MPa (39.2 ksi) and a tensile strength of 420 MPa (60.9 ksi) — weaker than 91% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is S275J2-ANN easy to machine?
Reasonably — machinability is rated good (64/100, better than 92% 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-ANN be welded?
Yes — weldability is rated excellent (94/100). 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-ANN?
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-ANN 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-ANN?
S275J2-ANN 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.