Alloy SteelBar/Rod
Description (English)
Tinel A (NiTiNb) shape memory alloy round bar. Wide-hysteresis, self-fastening upon heating. Up to 700 MPa recovery stress. GJB 8518-2015 certified.
Size Range
- Product Form Solid Round Bar
- Diameter Range 5 mm – 50 mm (0.20" – 1.97")
- Standard Lengths 500 mm – 2000 mm (19.7" – 78.7")
- Custom Sizes Available upon request
- Surface Treatment Sandblasting, passivation available
- Tolerance Per manufacturer standard or as specified
Grade Specification
| System | Value |
|---|
Chemical Composition
| Element | Value |
|---|---|
| Nickel (Ni) | 47.5 – 49.5 |
| Niobium (Nb) | 13.5 – 15.5 |
| Titanium (Ti) | Balance (~36–39) |
| Cobalt (Co) | ≤ 0.05 max |
| Copper (Cu) | ≤ 0.01 max |
| Chromium (Cr) | ≤ 0.01 max |
| Iron (Fe) | ≤ 0.05 max |
| Carbon (C) | ≤ 0.03 max |
| Hydrogen (H) | ≤ 0.005 max |
| Oxygen (O) | ≤ 0.06 max |
Mechanical Properties
| Property | Value |
|---|---|
| Ultimate Tensile Strength | 650 – 850 MPa (94 – 123 ksi) |
| Yield Strength (Rp0.2) | 300 – 450 MPa (43.5 – 65 ksi) |
| Elongation at Break | 12 – 28% |
| Maximum Recovery Stress | up to 700 MPa (100 ksi) |
| Maximum Shape Memory Strain | up to 8% (one-time, no load) |
| Cyclic Strain (100 cycles) | 2% / 275 MPa (40 ksi) |
| Cyclic Strain (100,000 cycles) | 1% / 140 MPa (10 ksi) |
| Superelasticity | 10 – 15% |
| Shape Memory Effect | ≥ 75% recovery ratio |
| Hardness | 220 – 300 HV |
Physical Properties
| Property | Unit | Value |
|---|---|---|
| Density | - | 6.35 – 6.45 g/cm³ (0.235 lb/in³) |
| Melting Point | - | ~1249°C (2282°F) |
| Thermal Conductivity | - | 14 – 18 W/m·K |
| Electrical Resistivity | - | 70 – 90 μΩ·cm |
| Operating Temperature Range | - | -80°C to 160°C (-112°F to 320°F) |
| Corrosion Resistance | - | Excellent (marine environments) |
Applications
- Military & Defense: Vehicle wiring (Bradley Fighting Vehicle), missile connectors (Trident), naval hydraulic systems
- Aerospace: Satellite components, aircraft wiring conduit termination, valve assemblies
- Naval: Submarine hydraulic couplings (Trafalgar-class), sonar towed arrays, gauge lines
- Industrial: Flow control valves, thermal protection devices, pressure sensors
- Medical: Piezoelectric accelerometer assembly, specialized actuators
- Oil & Gas: Downhole thermal actuators, flow control