概述
Tinel® A is a Nickel-Titanium-Niobium (NiTiNb) wide-hysteresis shape memory alloy originally developed by Raychem Corporation in the early 1980s. The addition of approximately 14% niobium significantly widens the transformation hysteresis to over 100°C, allowing deformed parts to remain stable at room temperature without requiring cryogenic storage. This enables practical handling and installation at ambient conditions. The alloy exhibits the unique ability to "remember" a previous shape after being plastically deformed. When heated above its transformation temperature, the material recovers its original shape and can generate recovery stresses up to 700 MPa (100 ksi) if resisted. This property makes Tinel A the preferred alloy for Tinel-Lock® fastener rings, Cryofit® couplings, and thermal actuators used in military, aerospace, naval, satellite, and industrial applications. Tinel A conforms to GJB 8518-2015 (Chinese military standard for shape memory alloy lock rings) and is available as solid round bar stock in diameters from 5 mm to 50 mm, with lengths up to 2000 mm. Custom sizes and transformation temperatures are available upon request.
尺寸范围
- 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
牌号标准
| 标准体系 | 数值 |
|---|
化学成分
| 元素 | 数值 |
|---|---|
| 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 |
机械性能
| 性能 | 数值 |
|---|---|
| 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 |
物理性能
| 性能 | 单位 | 数值 |
|---|---|---|
| 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) |
应用场景
- 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