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Superelastic Nickel Titanium Alloy Wire with Shape Memory Effect for Corrosion Resistant Applications

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Superelastic Nickel Titanium Alloy Wire with Shape Memory Effect for Corrosion Resistant Applications

Supply Ability : 1000 Ton per year

Af : 70°C

Model Number : Nitinol

Material type : Superelastic NiTi / Shape memory NiTi

Price : USD30~50/kg

Standardspecifications : ASTM F2063

Certification : ISO9001

Elongation : 15% to 40%

MOQ : 1~10kg

Delivery Time : 3~20 days

Product name : Nickel titanium Alloy Wire

Supply shape : coil wire / straight wire

Payment Terms : T/T

Insulation : Bare

Brand Name : TANKII

Color : bright/black

Place of Origin : China

Diameter : 0.02 -1.00 MM

Packaging Details : Standard exoprt package

Application : Medical, actuator, spring, industrial

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Nickel-Titanium Shape Memory Alloy Wire

Nitinol wire is a metal alloy wire made primarily of Nickel and Titanium (roughly 50/50). Its name comes from its composition (Nickel Titanium Naval Ordnance Laboratory, where it was discovered).

It is famous for two unique properties not found in standard metal wires:

  • 1. Shape Memory Effect

    Nitinol can "remember" and return to a pre-programmed shape when heated.

    • How it works: You can bend a cold Nitinol wire into any shape. When you heat it past a specific temperature (e.g., with hot water or an electric current), it will instantly snap back to its original, straight or pre-set form.

    • Example: A bent Nitinol wire straightens out in warm water.

    2. Superelasticity (Pseudoelasticity)

    At room temperature (above its transformation temperature), Nitinol is extremely flexible and can withstand massive deformation without taking a permanent set.

    • How it works: You can bend or twist a Nitinol wire up to 10-30 times more than stainless steel, and it will spring back to its original shape instantly when released. This is like "memory foam" for metal.

    • Example: Flexible eyeglass frames that can be twisted without breaking.

Common Names and Grades
Grade Name Main Characteristics
NiTi Nickel Titanium Alloy General purpose nickel-titanium alloy
Nitinol Nickel Titanium Naval Ordnance Laboratory Common commercial name for nickel-titanium shape memory alloys
Superelastic NiTi Superelastic NiTi Superelastic nickel-titanium wire with high elastic recovery at room temperature
Shape Memory NiTi Shape Memory NiTi Shape memory nickel-titanium wire that returns to its original shape after heating
Medical Grade NiTi Medical Grade NiTi Nitinol nickel-titanium wire for medical devices
Actuator Grade NiTi Actuator Grade NiTi Nickel-titanium wire for actuators/drivers
Generally, we calculate the unit price based on the diameter, phase transition temperature (Af), surface condition, usage condition, and standard/application provided by the customer.
Main Chemical Content
Chemical Content
Ni 54.5~57 wt%
Ti Bal.
Key Parameter: Austenite Finish Temperature (Af)
The most commonly used parameter in purchasing and applications is the Af temperature (Austenite finish temperature).
Simple explanation:
  • Af below room temperature: The material usually shows superelastic behavior at room temperature.
  • Af above room temperature: The material is easier to deform at room temperature and recovers its shape after heating, showing shape memory behavior.
Common Af Temperature Ranges
Type Af Temperature Typical Applications
Superelastic type Approx. -20°C to +20°C Medical stents, eyeglass frames, elastic components
Low-temperature shape memory type 30°C-45°C Temperature-control springs, toys, demonstration materials
Medium-temperature shape memory type 45°C-70°C Actuators, switches, automatic reset structures
High-temperature shape memory type 70°C-100°C or higher Special industrial temperature-control components
Main Features of Nickel Titanium Wire
Shape Memory Effect
Nickel titanium wire can be stretched or bent at a lower temperature, and then return to its preset shape when heated.
Superelasticity
Some nickel titanium wires can undergo large deformation at room temperature and then recover automatically.
Good Corrosion Resistance
Nickel titanium alloy forms a stable titanium oxide film on its surface, giving it good corrosion resistance, especially in medical and humid environments.
Good Biocompatibility
Medical-grade nickel titanium wire is widely used in implantable and interventional medical devices, such as:
  • Vascular stents
  • Orthodontic wires
  • Guide wires
  • Orthopedic fixation components
For medical applications, the material must meet relevant standards and certification requirements. Ordinary industrial-grade material should not be used as a substitute.
Relatively High Electrical Resistivity and Joule Heating Capability
Nickel titanium wire can be heated by electric current to reach its transformation temperature and generate mechanical movement. Therefore, it can also be used as a simple electrothermal actuator.
Applications of Nickel Titanium Wire
  • Medical devices
  • Dental orthodontics
  • Eyeglass industry
  • Industrial temperature control
  • Robotics and smart materials
  • Aerospace
  • Electronics and electrical appliances
  • Teaching and experiments
Product Images
Superelastic Nickel Titanium Alloy Wire with Shape Memory Effect for Corrosion Resistant Applications
Flat wire :
Superelastic Nickel Titanium Alloy Wire with Shape Memory Effect for Corrosion Resistant Applications

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