Steel S275JR
EN S275JR · JIS SS490
S275JR is a hot-rolled non-alloy structural steel to EN 10025-2 (1.0044) with 275 MPa minimum yield and typical values of 300 MPa yield, 450 MPa tensile, 26 % elongation and 130 HB.
Values for the HR condition
S275JR tempers and conditions
S275JR is supplied in 3 conditions, soft to hard. HR 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 |
|---|---|---|---|---|---|---|
Normalized | Pick for heavier plate where a fine, uniform grain and better through-thickness toughness and bend behaviour are wanted. | 295 | 440 | 28 | 125 HB | 10 % IACS |
HRDefault Hot rolled | Default commodity condition for plate, sheet, sections and bar; choose for welded structures and general fabrication. | 300 | 450 | 26 | 130 HB | — |
Cold rolled | Choose for thin sheet or bar needing tight tolerance, smooth surface and higher yield; ductility and bendability are reduced. | 380 | 500 | 14 | 160 HB | — |
Supply forms, finishes and certifications
Ways S275JR is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
Galvanized | Hot-dip zinc coated | Coating |
What is S275JR?
S275JR is a hot-rolled non-alloy structural steel to EN 10025-2 (1.0044) with 275 MPa minimum yield and typical values of 300 MPa yield, 450 MPa tensile, 26 % elongation and 130 HB. It gives more load capacity than S235JR while keeping excellent weldability (rated 95) and good cold formability, and is available as hot-rolled or cold-rolled plate, sheet and sections, galvanized or normalized. It has no corrosion resistance and a service limit of about 350 °C, so coating is mandatory. Q275, SS490 and A572 Grade 42 are the near equivalents; move to S355J2 where higher strength or guaranteed low-temperature toughness is required. S275JR 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). S275JR 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 26% and the elastic modulus is 210 GPa (30.5 Msi).
What is S275JR used for?
- Welded bridge components
- Industrial building frames
- Machine frames and weldment bases
- Structural beams, channels and angles
- Base plates and mounting brackets
- Agricultural and materials-handling equipment frames
- Galvanized platforms, stairs and walkways
Advantages
- Readily welded — 95/100, better than 97% of steel grades
- Easy to machine — 65/100, better than 93% of steel grades
- Low embodied carbon — 1.9 kg CO₂/kg, better than 92% of steel grades
- Forms and bends easily — 78/100, better than 91% of steel grades
- Conducts heat well — 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% 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
- Low fracture toughness — 65 MPa·√m (59.2 ksi·√in), worse than 75% of steel grades
S275JR properties
Typical room-temperature values for S275JR-HR; bars are the position among steel grades.
Physical3
S275JR 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
S275JR 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 26% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
S275JR 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
S275JR 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 S275JR takes about 25 MJ of energy and emits 1.9 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 30%.
Manufacturability6
S275JR's machinability is good (65/100, better than 93% of steel grades); weldability excellent (95/100); formability very good (78/100).
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. S275JR is highlighted; hover a dot for its name, or open the interactive family chart.
Working with S275JR
Is S275JR easy to machine?
Free machining at moderate speeds with HSS or coated carbide; gummy chips and built-up edge in hot-rolled state — use positive rake, generous feed and coolant.
Can S275JR be welded?
Weldable by all common processes (SMAW/GMAW/SAW/FCAW) with E7018 or ER70S-6 class consumables; preheat normally unnecessary below ~30 mm, keep hydrogen low on thick restrained joints.
Can S275JR be formed, bent or molded?
Good cold bending and roll forming; typical inside bend radius 1–2 t for hot-rolled plate, hot work at 900–1200 °C, avoid forming in the 250–400 °C blue-brittle range.
Manufacturability
The process limits FabDigit applies to S275JR. Every S275JR part is priced by an engineer; design inside these and the quote comes back without a redesign loop.
CNC machining
| Machinability | Better65 / 100 |
|---|---|
| ISO material group | P.2 |
| Cutting speed (rough / finish) | 180 / 210 m/min |
| Minimum wall | 0.8 mm |
| Minimum internal radius | 1 mm |
| Drill depth limit | 5× diameter |
| Best surface (machined / polished) | Ra 1.6 / — |
| Hardenable after machining | No |
Sheet metal
| Formability | Excellent78 / 100 |
|---|---|
| Weldability | Excellent95 / 100 |
| Bendable | Yes |
S275JR 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 |
|---|---|---|
| Cmax 0.21 for t ≤ 16 mm; 0.22 above (flat products) | ≤ 0.21 | 0.17 |
| Mn | ≤ 1.5 | 0.8 |
| Sinot specified in EN 10025-2; typical mill level | ≈ 0.2 | 0.2 |
| P0.040 max for long products | ≤ 0.04 | 0.02 |
| S0.040 max for long products | ≤ 0.04 | 0.02 |
| N | ≤ 0.01 | 0.01 |
| Cu | ≤ 0.55 | 0.2 |
| Febalance; CEV ≤ 0.40 | balance |
What surface finishes work on S275JR?
Must be coated — shot blast then paint/primer, hot-dip galvanize (Si-controlled heats for smooth coating), or zinc-rich/powder coat; no anodizing (ferrous).
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).
Plating
CVD Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel S275JR in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
How much does S275JR cost?
S275JR is a budget-cost steel ($), cheaper than about 99% 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.
S275JR — frequently asked
What is S275JR used for?
S275JR is typically used for welded bridge components, industrial building frames, machine frames and weldment bases, structural beams, channels and angles, base plates and mounting brackets and agricultural and materials-handling equipment frames. In short: workhorse structural plate.
What is the yield strength of S275JR?
S275JR 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 S275JR easy to machine?
Reasonably — machinability is rated good (65/100, better than 93% of steel grades). Free machining at moderate speeds with HSS or coated carbide; gummy chips and built-up edge in hot-rolled state — use positive rake, generous feed and coolant.
Can S275JR be welded?
Yes — weldability is rated excellent (95/100). Weldable by all common processes (SMAW/GMAW/SAW/FCAW) with E7018 or ER70S-6 class consumables; preheat normally unnecessary below ~30 mm, keep hydrogen low on thick restrained joints.
What surface finishes work on S275JR?
Must be coated — shot blast then paint/primer, hot-dip galvanize (Si-controlled heats for smooth coating), or zinc-rich/powder coat; no anodizing (ferrous).
Can S275JR be formed, bent or molded?
Good cold bending and roll forming; typical inside bend radius 1–2 t for hot-rolled plate, hot work at 900–1200 °C, avoid forming in the 250–400 °C blue-brittle range.
What is the maximum service temperature of S275JR?
S275JR 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 S275JR-HR and S275JR-CR?
HR is the default condition — default commodity condition for plate, sheet, sections and bar; choose for welded structures and general fabrication. CR: choose for thin sheet or bar needing tight tolerance, smooth surface and higher yield; ductility and bendability are reduced. Yield strength is 300 MPa in HR versus 380 MPa in CR.
How much does S275JR cost?
S275JR is a budget-cost steel ($), cheaper than about 99% 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.
Can FabDigit make parts in S275JR?
Yes — S275JR is available for CNC machining and sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- EN 10025-2 Hot rolled products of structural steels — Non-alloy structural steels — CEN (2019)
- EN 10027-2 / material number 1.0044 — CEN (2015)
- GB/T 700 (Q275 comparison) — SAC (2006)
- EN 1993-1-1 / EN 1993-1-2 (design and thermal properties of structural steel) — CEN (2005)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- Structural steel plate grade datasheets (ArcelorMittal, Tata Steel Europe) — producers (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.