Structural steel · EN 10025-2
S275JR
Also known as: 1.0044, S275
Overview
European structural steel between S235 and S355 — common default for general steelwork when S235 capacity is marginal.
Typical supply: Plate, sections, hollow sections, bars
Mechanical Properties
Young's modulus E210 GPa
Shear modulus G80.8 GPa
Yield / proof Re275 MPa
Ultimate Rm430 MPa
Poisson's ratio ν0.3
Shear strength258 MPa
Bearing strength550 MPa
Thermal Properties
Thermal expansion α12 µm/(m·K)
For temperature derating, open Temperature Properties.
Physical Properties
Density ρ8e+3 kg/m³
Specific strength Sy/ρ3.50e+4 Pa·m³/kg
Specific stiffness E/ρ2.68e+7 Pa·m³/kg
Typical supply: Plate, sections, hollow sections, bars
Density 7850 kg/m³. Plate, sections, HSS, and bars.
Applications
- Building and industrial frames
- Welded plate structures
- Machine bases and supports
- Secondary bridge members (check project specs)
Advantages
- Common EU default between S235 and S355
- Good fabrication and welding characteristics
- Balanced capacity vs cost for general steelwork
Limitations
- Lower yield than S355 for primary members
- Needs coating for outdoor exposure
- JR impact grade suited to ambient service only
Standards
- EN 10025-2 — Hot rolled products of structural steels
- Eurocode 3 — Design of steel structures (material properties)
Equivalent Materials
Electrical Properties
Resistivity1.600e-7 Ω·m
Conductivity10 % IACS
Chemical Composition
| Element | Min wt% | Max wt% | Typical wt% |
|---|---|---|---|
| C | — | 0.21 | 0.15 |
| Mn | — | 1.5 | 1 |
| P | — | 0.035 | — |
| S | — | 0.035 | — |
| N | — | 0.012 | — |
| Cu | — | 0.55 | — |
Typical / limit values for reference selection only — verify against mill certs for certified work.
Machinability
Similar to S235; good fabrication and welding characteristics.
Cost
Slight premium over S235; often the catalog default structural grade.
Corrosion
Requires coating outdoors; JR impact grade for ambient service.
- Indoor dryfair
- Outdoor paintedfair
- Marine atmospherepoor
For allowance / life screening, open Corrosion Allowance.