Super Elastic Nitinol Wire

Super elastic nitinol wire is a high-performance alloy wire material used in the manufacture of medical devices, often used in cardiac stents, vascular implants, dental instruments, etc.

It is made of nickel-titanium (Ni-Ti) alloy, which can experience a large amount of strain without permanent deformation under large shape deformation, and has good elasticity and fatigue strength, hence the name "Superelastic".

Both nitinol wire and Shape memory nitinol wire are the most mature form of this unique superelastic and shape memory alloy, being commercialized in the mid-1980s. Superelastic nitinol wire, also known as shape memory alloy wire, is an alloy composed of nickel and titanium. It is available in many different sizes, alloys, and finishes. And, shape memory or superelastic forms are both offered. Nitinol wires are gaining increasing use in the medical device industry for jewelry, guide wires, paraglider, glasses frame, medical, and other critical applications.

• Nickel: 55% - 60%
• Titanium: 40% - 45%

• Density: 6.45 g/cm³
• Melting point: 1310-1365°C

Titanium and nickel atoms in nitinol alloy wire form a special lattice structure that enables it to achieve shape memory and superelastic properties. At low temperatures, the alloy is in the austenitic state and is prone to bending and deformation. As the temperature increases, the alloy transforms from austenite to martensite, exhibiting a surprising superelastic property.

Super elastic nitinol wire, superelasticity is the unique natural performance of Nitinol wire. The so-called superelasticity is above the AF temperature because it is basically soft or inelastic below the AF temperature, so it has room temperature superelasticity (such as AF=25 ℃) and low-temperature superelasticity (such as AF= -5℃).

Nitinol is A shape-memory alloy SMA is an alloy with features: shape memory characteristics and is super-elastic, SMA can "remember" its original shape and deformed to its pre-deformed shape when heated. Nickle 55% Titanium 45%. There is a slight change in the composition, and it will significantly affect the material properties.

1) Material preparation: The main raw materials for the manufacture of nitinol wire are nickel and titanium, and the purity and ratio of the materials are required to be precise.

2) Smelting alloy: Nickel and titanium are melted by arc melting or vacuum induction melting technology, and mixed to make Ni-Ti alloy.

3) Stretching: The Ni-Ti alloy is processed into filaments through a stretching machine. During this process, the processing temperature and stretching speed need to be controlled to ensure the quality of the material.

4) Heat Treatment: The filamentary material is heat treated to give it the desired superelastic properties.

5) Surface treatment: The filamentary material is subjected to surface treatment such as polishing and cleaning to ensure that its surface is smooth and free of impurities.

The final produced superelastic nitinol alloy wire should have high performance and stability to ensure the application effect and safety in medical devices.

1) Medical devices: used as materials for medical devices such as stents and valves.

2) Automotive industry: used for car keys, car anti-theft brackets, etc.

3) Aerospace: used to manufacture shells and components with high aerodynamics, highly guided ballistics, high force, and high temperature.

4) Construction industry: for the manufacture of complex elastic structures and components.

The above are the application fields of super elastic nitinol wire.

• Packing with moisture-proof paper.
• Packaging with Carton.
• Packaging with foam plastics in all sides of the carton.
• Packing big quantities of products in wooden cases.

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