SMA
Austenite Phase ⇌ Martensite Phase
Shape Memory Alloy
Shape Memory Alloys (SMAs) are intelligent metals that recover their original shape after deformation when heated. This phase transformation generates stable recovery stress, converting thermal energy into mechanical energy without complex mechanical systems.
SMAs provide active prestressing and adaptive structural performance, making them ideal for advanced engineering applications.
- Medical: Stents & orthodontic wires
- Aerospace: Deployable structures & actuators
- Electronics: Camera autofocus modules
Compact, reliable, and intelligent solutions.
Fe-SMA transforms prestressing technology from " a construction process " into " an intrinsic material capability . "By enabling more flexible and efficient prestress distribution within complex spatial structures, it is ushering in a new era of Smart Prestressing for next-generation infrastructure.
Fe-based Shape Memory Alloy
Fe-based Shape Memory Alloys (Fe-SMAs) overcome the cost and scalability limitations of conventional NiTi alloys, bringing shape memory technology into modern civil engineering.
With high recovery stress, excellent corrosion resistance, and superior fatigue performance, Fe-SMA delivers active prestressing through simple thermal activation, eliminating the need for large hydraulic jacking systems.
Suitable for straight, curved, and complex structures, Fe-SMA enables lightweight, high-performance solutions for bridges, tunnels, buildings, offshore, and prefabricated construction.
Fe-SMA Rebar & Round Bar
| Diameter | 10 / 16 / 30 mm |
|---|---|
| Weight | 0.61 / 1.57 / 5.55 kg/m |
| Elastic Modulus | 180 ± 10 GPa |
| Break Elongation | ≥20% |
| Yield Strength | ≥500 MPa |
| Tensile Strength | ≥840 MPa |
| Pre-strain | Activated Temperature 200°C | Activated Temperature 300°C |
|---|---|---|
| 4% | ≥320 | ≥350 |
| 6% | ≥360 | ≥390 |
Fe-SMA Plate
| Thickness (mm) | 3.5 |
|---|---|
| Weight (kg/m) | 27.3 |
| Elastic Modulus (GPa) | 180 ± 10 |
| Break Elongation (%) | ≥13 |
| Yield Strength (MPa) | ≥560 |
| Tensile Strength (MPa) | ≥840 MPa |
| Recovery Stress (MPa) | |
|---|---|
| Pre-strain | Activated Temperature 300°C |
| 4% | ≥350 |
| 6% | ≥480 |
| 8% | ≥400 |
Fe-SMA wires
| nominal diameter (mm) | 4.0 |
|---|---|
| Yield Strength (MPa) | ≥1300 |
| Tensile Strength (MPa) | ≥1900 |
| Elongation (%) | ≥5.8 |
| Recovery Stress (MPa) | |
|---|---|
| Pre-strain | Activated Temperature 400°C |
| 0% | ≥290 |
More Innovative Products
Applications
Phase II of Hongshan Scientific Research & Office Building, Jiangsu Province, China
120-Year-Old Traditional Residence, Chenbao Town, Jiangsu Province, China
Zhangbei Photovoltaic Power Plant, Hebei Province, China
Global Strategic Partner
Refer AG (Switzerland)
Fusteel Co., Ltd. is proud to partner with Refer AG as our Exclusive Overseas Strategic Partner for Fe-SMA strengthening technologies.
Leveraging Refer AG's internationally recognized expertise in structural strengthening and Fusteel's advanced Fe-SMA material technology and manufacturing capabilities, the partnership delivers innovative, high-performance solutions for bridge rehabilitation, building strengthening, and next-generation infrastructure worldwide.
Together, we are accelerating the global adoption of Fe-SMA technology in civil engineering.
Learn More About Refer AG —>
