Nitinol tube is rolled and drawn from titanium-nickel alloy material.

Nitinol has two closely related and unique properties: shape memory and superelasticity. Our titanium-nickel nitinol tubes mainly use superelastic properties at room temperature, and the Af temperature is below 20°C.

Typical applications of nitinol tube:
Medical: Catheters, Needles, Dental Products, Guide Tube, Nitinol Tube Components, nickel-titanium nitinol stents, bone cement conveyors, etc.

Civil: sensor fasteners, pipe joints, memory alloy rings, etc.

Active Austenite Finish Temperature of Nitinol Tube

Nitinol tubing

 

 

The austenite finish temperature of the finished tube (active Af) with outer diameter in the range of 0.25mm to 7.0 mm (0.01 to 0.275 in.) shall be measured on representative full round tube sample(s) using the bend and free recovery method described in Test Method ASTM F 2082-15.

Mechanical Properties of Nitinol Tube

Condition

UTS
σMPa

Elongation
δ%

Upper Plateau Stressσload MPa

Active Af ℃

Superelastic

>1000

≥10

≥380

<20

* Superelastic properties are measured per Test Method F2516 at room temperature (22+/-2℃)
* Applicable Standard: ASTM F2633

Surface Finish
-Outer surface: Black oxide or Center-less Ground.
-Inner surface: Etched or oxide.
Other finishes can be discussed with EdgeTech Industries.

Nominal Dimensions and Tolerances

Nominal OD/ID mm (in)

Diameter tolerance mm (in)

≤1.5 (0.059)

+/-0.025 (+/-0.001)

1.5<OD≤6.5 (0.059~0.256)

+/-0.050 (+/-0.002)

6.5<OD≤10 (0.256~1.2)

+/-0.075 (+/-0.003)

* Other variations in OD and ID can be discussed.

Length
Nitinol tubes can be delivered in either exact length or random length. For random length orders, a maximum and minimum length shall be discussed.

Straightness
Straightness requirements and measurement methods shall be discussed.

Permissible Outer and Inner Surface Imperfections
Outer and inner surface imperfections criteria on tubes shall be discussed.

Nitinol tubes-0.27mm OD

Applicable Standards and Documents
-ASTM F2063-12 Standard Specification for Wright Nickel-Titanium Shape Memory Alloys for Medical Devices and Surgical Implants, or equivalent GB 24627-2009
-ASTM F2633-19 Standard Specification for Wrought Seamless Nickel-Titanium Shape Memory Alloy Tube 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 Transformation Temperature of Nickel-Titanium Alloys by Thermal Analysis
-ASTM F2516-18 Standard Test Method for Tension Testing of Nickel-Titanium Superelastic Materials
-ASTM F2082/F2082M-16 Standard Test Method for Determination of Transformation Temperature of Nickel-Titanium Shape Memory Alloys by Bend and Free Recovery
 
Ordering Information on Nitinol Wires and Tubes
Per ASTM F2063-12 or GB 24627-2009, ordering information or request for quotation should contain the following info:
-Chemical composition or alloy code;
-Transformation temperature for the material at delivery status, such as Af
-Shape of the material such as bars, wires, tubing, or others
-Dimensions, such as diameter, OD & ID of tube, as well as their tolerances
-Heat Treatment status at delivery, such as Super-elastic, Cold Worked
-Surface status at delivery
-Mechanical Properties: When delivered in super-elastic state, upper plateau stress, tensile strength and elongation should be specified; when delivered in cold-worked state, tensile strength and elongation should be specified
-Quantity, such as weight, length, or number of pieces
Certification Information
A certification indicating that the material meets the requirements of specification, plus test reports shall be given with shipment.
Testing Report: In terms of superelastic wires or tubes, following data should be given
-Dimension
-UTS
-Elongation
-Upper plateau stress
-Active Af by Bend & Free Recovery
-Permanent set after straining to 6% strain
-Chemical analysis
 

We also provide other nitinol products such as wire, flat wire, sheet, strip, foil, plate, rod, and machined/shape programmed nitinol parts. Click here to submit your request.