Steel E275M-M
Heat-treated state · default condition
EN 1.8895
M = thermomechanically controlled processed
Standard stocked condition for welded machine frames and structures at ambient to moderately low temperature.
Values for the M condition
Other E275M tempers and conditions
E275M is listed in 7 conditions; see the grade overview at E275M.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
M, thickness >40–63 mm | Thick-section supply for heavy welded structures; lowest guaranteed yield of the M range. | 285 | 430 | 26 | 128 HB | 10.5 % IACS |
Stress relieved | Use for dimensionally critical or thick welded assemblies; keep below 580 °C so TMCP strength is not lost. | 290 | 440 | 28 | 130 HB | 10.5 % IACS |
M, thickness >16–40 mm | Same delivery condition, reduced guaranteed yield because of section thickness. | 295 | 440 | 27 | 132 HB | 10.5 % IACS |
MDefaultThis page Thermomechanically controlled processed | Standard stocked condition for welded machine frames and structures at ambient to moderately low temperature. | 305 | 450 | 27 | 135 HB | 10.5 % IACS |
Thermomechanically rolled, low-temperature quality | Choose when guaranteed notch toughness down to −50 °C is required (cranes, offshore, cold-climate plant). | 305 | 450 | 28 | 135 HB | 10.5 % IACS |
Thermomechanically rolled hollow section | Tubular product form of the same TMCP steel for welded frames and truss structures. | 310 | 455 | 25 | 140 HB | 10.5 % IACS |
Cold drawn | Pick for close tolerances and higher strength in small machined parts; ductility and low-temperature toughness are reduced. | 430 | 520 | 14 | 165 HB | 10.5 % IACS |
What is E275M-M?
E275M-M is E275M heat treated to M — standard stocked condition for welded machine frames and structures at ambient to moderately low temperature. E275M-M has a yield strength of 305 MPa (44.2 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 84% of steel grades. Elongation at break is 27% and the elastic modulus is 210 GPa (30.5 Msi). E275M-M 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
- 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
- Tough — resists crack growth — 130 MPa·√m (118.3 ksi·√in), better than 89% of steel grades
- High electrical conductivity — 10.5 % IACS, better than 89% of steel grades
Limitations
- Low strength — 305 MPa (44.2 ksi), worse than 84% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
E275M-M properties
Typical room-temperature values for E275M-M; 23 are specific to this condition. Other listed values are E275M reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
E275M-M 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
E275M-M has a yield strength of 305 MPa (44.2 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 84% of steel grades. Elongation at break is 27% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
E275M-M is rated for continuous service to 350°C (662 °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
E275M-M 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 E275M-M takes about 25 MJ of energy and emits 1.9 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 30%.
Manufacturability7
E275M-M's machinability is good (60/100, better than 83% of steel grades); weldability excellent (92/100); formability very good (78/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with E275M-M
Is E275M easy to machine?
Machines like a soft low-carbon steel — use sharp positive-rake carbide, high speed and generous coolant to avoid built-up edge and stringy chips; cold-drawn bar gives better finish.
Can E275M be welded?
Excellent weldability (CEV ≤0.34): SMAW/GMAW/SAW with low-hydrogen consumables of matching 275–355 MPa class, little or no preheat below ~40 mm; keep heat input moderate and PWHT below 580 °C to retain TMCP properties.
Can E275M be formed, bent or molded?
Very good cold formability — press braking to ~1.5–2 t inner radius transverse to rolling direction; hot forming above ~580 °C erases the thermomechanical strengthening and requires re-qualification.
What surface finishes work on E275M?
No corrosion resistance of its own: shot blast to Sa 2½ then paint, metallize, or hot-dip galvanize (Si and P levels are compatible with normal galvanizing practice).
E275M 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 |
|---|---|---|
| Cladle analysis, all thicknesses | ≤ 0.13 | 0.09 |
| Si | ≤ 0.5 | 0.25 |
| Mn | ≤ 1.5 | 1.2 |
| P0.025 max for L quality | ≤ 0.03 | 0.02 |
| S0.020 max for L quality | ≤ 0.03 | 0.01 |
| N | ≤ 0.02 | 0.01 |
| Altotal Al, grain refinement | ≥ 0.02 | 0.04 |
| Nbmicroalloy; Nb+V+Ti ≤ 0.12 | ≤ 0.05 | 0.03 |
| V | ≤ 0.08 | 0.02 |
| Ti | ≤ 0.05 | 0.02 |
| Crresidual | ≤ 0.3 | 0.05 |
| Niresidual | ≤ 0.3 | 0.05 |
| Moresidual | ≤ 0.1 | 0.02 |
| Curesidual | ≤ 0.55 | 0.1 |
| Fe | balance | — |
E275M-M — frequently asked
What is E275M-M used for?
E275M-M is typically used for machine parts, structural components, welded assemblies and mechanical engineering parts. In short: easiest-welding grade in family; most formable fine-grain grade; low CEV, minimal preheat.
What is the yield strength of E275M-M?
E275M-M has a typical yield strength of 305 MPa (44.2 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 84% of steel grades. Strength varies by condition: see the 7 listed tempers.
Is E275M-M easy to machine?
Reasonably — machinability is rated good (60/100, better than 83% of steel grades). Machines like a soft low-carbon steel — use sharp positive-rake carbide, high speed and generous coolant to avoid built-up edge and stringy chips; cold-drawn bar gives better finish.
Can E275M-M be welded?
Yes — weldability is rated excellent (92/100). Excellent weldability (CEV ≤0.34): SMAW/GMAW/SAW with low-hydrogen consumables of matching 275–355 MPa class, little or no preheat below ~40 mm; keep heat input moderate and PWHT below 580 °C to retain TMCP properties.
What surface finishes work on E275M-M?
No corrosion resistance of its own: shot blast to Sa 2½ then paint, metallize, or hot-dip galvanize (Si and P levels are compatible with normal galvanizing practice).
Can E275M-M be formed, bent or molded?
Very good cold formability — press braking to ~1.5–2 t inner radius transverse to rolling direction; hot forming above ~580 °C erases the thermomechanical strengthening and requires re-qualification.
What is the maximum service temperature of E275M-M?
E275M-M 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 E275M-M and E275M-CD?
M is the default condition — standard stocked condition for welded machine frames and structures at ambient to moderately low temperature. CD: pick for close tolerances and higher strength in small machined parts; ductility and low-temperature toughness are reduced. Yield strength is 305 MPa in M versus 430 MPa in CD.
Sources
- EN 10025-4 — Hot rolled products of structural steels: thermomechanical rolled weldable fine grain structural steels — CEN (2019)
- EN 10027-2 — Numerical designation system for steels (material numbers) — CEN (2015)
- EN 10219-1 — Cold formed welded structural hollow sections of non-alloy and fine grain steels — CEN (2019)
- EN 1993-1-1 — Eurocode 3: Design of steel structures (material constants) — CEN (2005)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering (carbon equivalent / preheat practice) — ASM International (1993)
- TMCP fine-grain structural plate datasheets (S275M/S355M class) — European plate mills (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.