Steel E275M-MH
Other
EN 1.8895
MH = thermomechanically rolled hollow section
Tubular product form of the same TMCP steel for welded frames and truss structures.
Values for the MH 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 |
MDefault 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 |
MHThis page 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-MH?
E275M-MH is E275M in the MH condition — tubular product form of the same TMCP steel for welded frames and truss structures. E275M-MH has a yield strength of 310 MPa (45 ksi) and a tensile strength of 455 MPa (66 ksi) — weaker than 83% of steel grades. Elongation at break is 25% and the elastic modulus is 210 GPa (30.5 Msi). E275M-MH 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). M is the default condition FabDigit quotes; MH is available on request or by drawing note.
Advantages
- Low embodied carbon — 1.9 kg CO₂/kg, better than 92% of steel grades
- Readily welded — 90/100, better than 90% of steel grades
- High electrical conductivity — 10.5 % IACS, better than 89% of steel grades
- Forms and bends easily — 70/100, better than 86% of steel grades
- Conducts heat well — 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% of steel grades
Limitations
- Hard to polish — 45/100, worse than 84% of steel grades
- Low strength — 310 MPa (45 ksi), worse than 83% of steel grades
E275M-MH properties
Typical room-temperature values for E275M-MH; 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-MH 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-MH has a yield strength of 310 MPa (45 ksi) and a tensile strength of 455 MPa (66 ksi) — weaker than 83% of steel grades. Elongation at break is 25% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
E275M-MH 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-MH 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-MH 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-MH's machinability is good (58/100, better than 75% of steel grades); weldability excellent (90/100); formability very good (70/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with E275M-MH
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-MH — frequently asked
What is E275M-MH used for?
E275M-MH 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-MH?
E275M-MH has a typical yield strength of 310 MPa (45 ksi) and a tensile strength of 455 MPa (66 ksi) — weaker than 83% of steel grades. Strength varies by condition: see the 7 listed tempers.
Is E275M-MH easy to machine?
Reasonably — machinability is rated good (58/100, better than 75% 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-MH be welded?
Yes — weldability is rated excellent (90/100). 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-MH?
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-MH 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-MH?
E275M-MH 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.