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Nitiol Wire

Nickel titanium alloy is a type of shape memory alloy, which is a special alloy that can automatically restore its plastic deformation to its original shape at a specific temperature. Its expansion and contraction rate is over 20%, and its fatigue life reaches 1 * 10 to the 7th power. Its damping characteristics are 10 times higher than ordinary springs, and its corrosion resistance is superior to the best medical stainless steel currently available. Therefore, it can meet various engineering and medical application needs and is a very excellent functional material. Memory alloys not only have unique shape memory functions, but also have excellent characteristics such as wear resistance, corrosion resistance, high damping, and super elasticity.

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Standard for Nitiol Wire

  • GB 24627-2009/ ASTM F2063-18

Wrought nickel titanium shape memory alloy labels for medical devices and surgical implants.

  • ASTM F2633-19

Standard specification for seamless nickel titanium memory alloy fittings for medical devices and surgical implants.

  • ASTM F2005-05(2015)

Standard terminology for nickel titanium shape memory alloys.

  • ASTM F2004-17(2017)

Standard test method for testing the transition temperature of nickel titanium alloys using thermal analysis.

  • ASTM F2516-18

Tensile testing method for nickel titanium hyperelastic materials.

  • ASTM F2082/F2082M-16

Standard test method for phase transition temperature of nickel titanium shape memory alloys using bending and free recovery methods.



Surface State of Nitiol Wire Material

  • Black surface oxidation state

  • Light oxidation state (from golden yellow to brown)

  • Clean state

  • Luminosity state

  • Super bright state ®

  • Grinding state



Nitiol Wire Specification

Diameter 0.013-0.4mm



Special Properties of Nickel Titanium Alloy

Shape memory shape memory is that when the parent phase of a certain shape is cooled from above Af temperature to below Mf temperature to form martensite, martensite is deformed below Mf temperature and heated to below Af temperature. With reverse phase transformation, the material will automatically restore its shape in the parent phase. In fact, the shape memory effect is a thermally induced transformation process of NiTi alloy.


Superelasticity refers to the phenomenon where a specimen produces a strain far greater than the elastic limit strain under external force, and the strain can automatically recover during unloading. That is, in the parent phase state, due to the effect of external stress, stress induced martensite transformation occurs, so the alloy shows different mechanical behavior from ordinary materials, its elastic limit is far greater than ordinary materials, and no longer obeys Hooke's Law. Compared to shape memory properties, hyperelasticity has no thermal involvement. In summary, hyperelasticity refers to the fact that stress does not increase with strain within a certain deformation range, and can be divided into two types: linear hyperelasticity and nonlinear hyperelasticity. The stress-strain curve of the former shows a close linear relationship between stress and strain. Nonlinear hyperelasticity refers to the results of stress induced martensite transformation and its reverse transformation during loading and unloading in a certain temperature range above Af, so nonlinear hyperelasticity is also called transformation pseudoelasticity. The phase transformation pseudo elasticity of nickel titanium alloy can reach about 8%. The superelasticity of nickel titanium alloy can change with changes in heat treatment conditions. When the arch wire is heated above 400 º C, the superelasticity begins to decrease.



Titanium Nickel Wire Usage

  • At present, over 80% of titanium and titanium alloy wires are used as welding wires, such as welding various titanium equipment, welding pipes, repair welding of aviation jet engine turbine discs and blades, and welding of gearbox.


  • Due to its excellent corrosion resistance, titanium wire has been widely used in industries such as chemical, pharmaceutical, and papermaking. It can be woven into a mesh for seawater filtration, purified water filtration, chemical drug filtration, and so on.


  • Titanium and titanium alloy wires are also used to manufacture fasteners, load-bearing components, springs, etc. due to their excellent comprehensive performance.


  • In the healthcare industry, due to their excellent biocompatibility, titanium and titanium alloy wires are used to manufacture medical devices, implant dental crown fixation, skull fixation, etc.


  • Some titanium alloy wires with shape memory function, such as titanium nickel alloy wires, are used to make satellite antennas, shoulder pads for clothing, bras for women, glasses frames, etc.


  • In the electroplating and water treatment industries, titanium and titanium alloy wires are used to manufacture various electrodes.


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