Cu-Zn-Al Shape Memory Alloy
Verifiedmetal· CuZnAl· Copper-Zinc-Aluminum SMA· Beta brass SMA
Cu-Zn-Al is a copper-based shape memory alloy (SMA) that exhibits superelastic and shape-recovery behavior through reversible phase transformations between austenite and martensite crystal structures. This alloy family is valued in applications requiring actuation, vibration damping, and precise mechanical recovery at moderate temperatures, with Cu-Zn-Al offering lower cost and better machinability than Ni-Ti alternatives while accepting trade-offs in repeatability and thermal cycling stability. It operates in a narrow temperature window around room temperature, making it suited to ambient-condition devices but limiting use in high-temperature environments compared to competing SMAs.
mechanical actuation devicesvibration damping couplingsbiomedical fasteners and clipsthermostat and thermal control switchesshape-memory springs and connectorsproof-of-concept SMA prototypes
Compliance & Regulations
?Conflict Free?FDA?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | — | - | — | — | |
Recovery Strain(ε_rec) | — | - | — | — | |
Ultimate Tensile Strength(σUTS) | — | ksi | — | — | |
Young's Modulus(E) | — | ksi | notes | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Austenite Finish Temperature (Af)(Af) | — | °F | — | — | |
Martensite Start Temperature (Ms)(Ms) | — | °F | — | — | |
Maximum Service Temperature(Tmax) | — | °F | — | — | |
Thermal Conductivity(k) | — | BTU/(hr·ft·°F) | — | — | |
Thermal Hysteresis(ΔT_hyst) | — | °F | — | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | — | lb/in³ | — | — |
Verified Unverified Low confidence (<80%) Link to source
Regulatory Screening
Environmental
Safety & Biocompatibility
Quality & Standards
RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.