Cu-Al-Ni Shape Memory Alloy
Verifiedmetal· CuAlNi· Copper-Aluminum-Nickel SMA
Cu-Al-Ni is a copper-based shape memory alloy (SMA) that exhibits both the one-way shape memory effect and superelastic behavior, allowing it to recover large deformations upon heating or unloading. It is used in actuators, sealing devices, and vibration dampers where its ability to transform between crystalline phases at relatively moderate temperatures provides reliable, reversible motion without external power. Engineers select this alloy over NiTi alternatives when lower cost, higher thermal conductivity, or operation in the 150–200 °C range is required, though it offers narrower temperature windows and greater thermal hysteresis than nickel-titanium counterparts.
thermal actuatorssealing and couplingsvibration dampingmedical devicesaerospace fastenersprecision automation
Compliance & Regulations
?Conflict Free?FDA?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | — | - | — | — | |
Recovery Strain(ε_rec)2 entries | — | - | — | — | |
| ↳ | — | - | — | — | |
Stress–Strain Curve(σ–ε) | Curve (9 pts) | ksi | 100°C | — | |
Superelastic Plateau Stress(σ_SE)2 entries | — | ksi | — | — | |
| ↳ | — | ksi | — | — | |
Ultimate Tensile Strength(σUTS) | — | ksi | — | — | |
Young's Modulus(E) | — | ksi | notes | — |
N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form / heat treatment / basis.
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 | — | — | |
Melting Point / Solidus(Tm) | — | °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.