Nitinol

Overview

Nitinol is a kind of shape memory alloy, shape memory alloy is a special alloy that can automatically restore its plastic deformation to its original shape at a certain temperature. Its expansion rate is more than 20%, the fatigue life is up to 1*107, the damping characteristics are 10 times higher than the ordinary spring, and its corrosion resistance is better than the best medical stainless steel at present. Nitinol can meet the needs of various engineering and medical applications, it is a very excellent functional material.

Characteristics

  • ◎ Shape memory
  • ◎ Super elastic
  • ◎ Sensitivity to oral temperature change
  • ◎ Corrosion resistance: studies show that the corrosion resistance of Nitinol is similar to that of stainless steel.
  • ◎ Anti-toxicity: The special chemical composition of Nitinol, which is an atomic alloy such as nickel-titanium, contains about 50% nickel, which is known to cause and promote cancer. In general, surface layer titanium oxidation acts as a barrier, making Ni-Ti alloy with good biocompatibility. TiXOy and TixNiOy in the surface layer can inhibit the release of Ni
  • ◎ Soft healing power
  • ◎ Good shock absorption

Application

  • ◎ Aerospace industry
  • ◎ Mechanical and electronic products
  • ◎ Biomedical
  • ◎ Building structure
  • ◎ Daily life
  • NiTi alloy has good stability, low toxicity, low degradability, and its biohistocompatibility and blood compatibility can be compared with the current medical zirconium base alloy and Ta alloy, coupled with unique shape memory effect and superelastic properties, NiTi alloy has become one of the most important metal biomedical materials. It is widely used in bone surgery. Surgical instruments for interventional medicine.
    Typical medical applications include, but not limited to, Catheter, endoscope instrument, injection puncture instrument, etc.

Technical norms

  • ◎ ASTM F2063
  • ◎ GB 24627
  • ◎ ASTM F2633
  • ◎ ASTM F2005
  • ◎ ASTM F2004
  • ◎ ASTM F2516
  • ◎ ASTM F2082

Chemical composition

Ni Ti C Co Cu
54.5-57.0 balance ≤0.050 ≤0.050 ≤0.010
Cr H Fe Nb N+O
≤0.010 ≤0.005 ≤0.050 ≤0.025 ≤0.050

Tube features

Thin wall capillary tube

(1) Excellent interior and exterior surface quality
(2) The performance meets the requirements of implanted devices
(3) It can be applied to all kinds of catheters, cardiovascular and peripheral stents.

Thin wall tube

(1) Excellent interior and exterior surface quality
(2) The performance meets the requirements of implanted devices
(3) It can be used in cardiovascular stent, valve stent, peripheral stent, etc.

OD surface

  • ◎ Black oxidation
  • ◎ Slightly oxidized
  • ◎ Bright surface
  • ◎ Pickled surface
  • ◎ Polished surface

ID surface

  • ◎ Slightly oxidized
  • ◎ Pickled surface
  • ◎ Polished surface

Product forms

Capillary tube

  • ◎ OD 0.30 ~ 3.0 mm
  • ◎ WT 0.05 ~ 0.5 mm

Precision seamless tube

  • ◎ OD 3.0 ~ 15.0 mm
  • ◎ WT 0.10 ~ 2.5 mm

    • Note: round tube, oval tube and shaped tube could be customized.

Service

  • ◎ Precision cutting
  • ◎ Tube surface treatment, like ID surface super mirror polishing, best level could reach Ra0.0015um
  • ◎ Tube deep processing, like coiling, bending, end forming, body forming, laser processing, various needles processing, built to drawing and sample, etc.