Fe-Mn-Si shape memory alloy is an iron-based intermetallic compound that exhibits reversible martensitic phase transformation, enabling controlled recovery of pre-set shapes when heated above its transition temperature. This alloy system is valued in engineering applications requiring low-cost alternatives to nickel-titanium (NiTi) SMAs, with particular strength in seismic damping, pipeline couplings, and thermal actuators where moderate recovery strain and reliable cycling performance are acceptable trade-offs for reduced material cost and improved corrosion resistance. Unlike NiTi, Fe-Mn-Si alloys tolerate larger thermal hysteresis windows and perform well in iron-rich industrial environments, making them especially competitive in civil infrastructure, automotive safety systems, and geothermal applications.
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1 interactive curve for this material
Stress-strain, S-N fatigue and environmental knockdown curves are free with an account.
Create free account| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | 25.00 | - | — | ||
Poisson's Ratio(ν) | 0.2800 | - | — | ||
Recovery Strain(ε_rec)2 entries | 3.000 | - | — | ||
| ↳ | 2.000 | - | — | ||
Stress–Strain Curve(σ–ε) | Curve (12 pts) | Pa | 20°C | ||
Ultimate Tensile Strength(σUTS) | 680.0 | MPa | — | ||
Yield Strength (0.2% offset)(σy) | 350.0 | MPa | — | ||
Young's Modulus(E) | 160.0 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Austenite Finish Temperature (Af)(Af) | 433 | K | — | ||
Martensite Start Temperature (Ms)(Ms) | 373 | K | — | ||
Thermal Conductivity(k) | 15.00 | W/(m·K) | — | ||
Thermal Hysteresis(ΔT_hyst) | 100 | K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 7.500 | kg/m³ | — |