Steel S275J0 +AR (Hot rolled)
Heat-treated state · default condition
EN S275J0
Standard stock condition for plate, sections and flat bar where only the EN 10025-2 mechanical minima are required.
Values for the +AR condition
Other S275J0 tempers and conditions
S275J0 is listed in 4 conditions; see the grade overview at S275J0.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
+ARDefaultThis page Hot rolled | Standard stock condition for plate, sections and flat bar where only the EN 10025-2 mechanical minima are required. | 300 | 460 | 23 | 140 HB | — |
Normalized | Choose for heavy plate, pressure-bearing weldments or where uniform fine grain and reliable 0 °C toughness through thickness are needed. | 310 | 455 | 25 | 135 HB | — |
Thermomechanically controlled processed | Used for coil/plate where a leaner carbon equivalent (better field weldability) and fine grain are wanted at the same 275 MPa class. | 315 | 450 | 26 | 135 HB | 10 % IACS |
Cold drawn | Pick for bright bar with tight tolerance and higher strength; strength gain comes with reduced ductility and residual stress. | 420 | 540 | 13 | 170 HB | — |
What is S275J0 +AR?
S275J0 +AR is S275J0 heat treated to +AR — standard stock condition for plate, sections and flat bar where only the EN 10025-2 mechanical minima are required. S275J0 +AR 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). S275J0 +AR 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).
Advantages
- Readily welded — 92/100, better than 93% of steel grades
- Forms and bends easily — 75/100, better than 90% 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
S275J0 +AR properties
Typical room-temperature values for S275J0 +AR; 10 are specific to this condition. Other listed values are S275J0 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
S275J0 +AR 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
S275J0 +AR 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
S275J0 +AR 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
S275J0 +AR conducts electricity at 10 % IACS, better than 83% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of S275J0 +AR takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 30%.
Manufacturability8
S275J0 +AR's machinability is good (60/100, better than 83% of steel grades); weldability excellent (92/100); formability very good (75/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with S275J0 +AR
Is S275J0 easy to machine?
Machines like ordinary mild steel at ~65 % of 1212; gummy chips and built-up edge — use positive rake, sharp tooling and generous coolant.
Can S275J0 be welded?
Excellent weldability by SMAW/GMAW/SAW with E70/G3Si1 consumables; CEV ≤0.40 means little or no preheat below ~30 mm, preheat 100–150 °C for heavy restrained joints.
Can S275J0 be formed, bent or molded?
Good cold bending and press-braking; use inside bend radius ≥1.5–2 t transverse to rolling direction, hot forming 900–1050 °C followed by normalizing.
What surface finishes work on S275J0?
No anodizing; must be shot-blasted to Sa 2.5 then painted, hot-dip galvanized or metallized for any outdoor or humid service.
S275J0 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 thicker product (EN 10025-2) | ≤ 0.18 | 0.16 |
| Mn | ≤ 1.5 | 1.1 |
| Pladle analysis | ≤ 0.03 | 0.02 |
| Sladle analysis | ≤ 0.03 | 0.02 |
| Nlimit waived if sufficient N-binding elements present | ≤ 0.01 | 0.01 |
| Cu | ≤ 0.55 | 0.2 |
| Sinot limited by EN 10025-2 for S275J0; typical mill practice value | ≤ 0.4 | 0.2 |
| Fe | balance | — |
S275J0 +AR — frequently asked
What is S275J0 +AR used for?
S275J0 +AR is typically used for structural steelwork, heavy machinery frames, bridges and industrial buildings. In short: stronger than S235 structural; still fully weldable; 27 J toughness at 0 °C.
What is the yield strength of S275J0 +AR?
S275J0 +AR 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 4 listed tempers.
Is S275J0 +AR easy to machine?
Reasonably — machinability is rated good (60/100, better than 83% of steel grades). Machines like ordinary mild steel at ~65 % of 1212; gummy chips and built-up edge — use positive rake, sharp tooling and generous coolant.
Can S275J0 +AR be welded?
Yes — weldability is rated excellent (92/100). Excellent weldability by SMAW/GMAW/SAW with E70/G3Si1 consumables; CEV ≤0.40 means little or no preheat below ~30 mm, preheat 100–150 °C for heavy restrained joints.
What surface finishes work on S275J0 +AR?
No anodizing; must be shot-blasted to Sa 2.5 then painted, hot-dip galvanized or metallized for any outdoor or humid service.
Can S275J0 +AR be formed, bent or molded?
Good cold bending and press-braking; use inside bend radius ≥1.5–2 t transverse to rolling direction, hot forming 900–1050 °C followed by normalizing.
What is the maximum service temperature of S275J0 +AR?
S275J0 +AR 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 S275J0 +AR and S275J0-CD?
+AR is the default condition — standard stock condition for plate, sections and flat bar where only the EN 10025-2 mechanical minima are required. CD: pick for bright bar with tight tolerance and higher strength; strength gain comes with reduced ductility and residual stress. Yield strength is 300 MPa in +AR versus 420 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 (1.0143) — CEN (2015)
- EN 1993-1-1 Eurocode 3: Design of steel structures — General rules — CEN (2005)
- GB/T 700 Carbon structural steels (Q275) — SAC (2006)
- 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)
- worldsteel Life Cycle Inventory data for steel products — World Steel Association (2022)
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.