Nitinol Tube — Superelastic & Shape Memory Alloy ASTM F2063 Supplier
Princeton Nitinol supplies medical-grade Nitinol (NiTi) tube engineered for superelastic and shape memory performance. Fully compliant with ASTM F2063, ASTM F2633, ISO 5832-11, and ISO 9001:2015. OD from 0.2 mm to 25 mm, wall thickness from 0.015 mm to 2 mm with custom Af temperatures and surface finishes — trusted by medical device OEMs for stent tubing, catheter shafts, and minimally invasive instrument components worldwide.
ASTM F2063 & F2633 Certified Tube
Medical-grade chemistry and transformation temperature control for vascular stents, catheter systems, and implantable device components.
Ultra-Thin Wall — 0.015 mm Minimum
Precision-drawn tube with exceptional wall concentricity for stent laser cutting and micro-fluidic applications demanding minimal wall thickness.
OD 0.2 mm to 25 mm
From micro-tube for neurovascular applications to large-diameter tube for structural implants. Oxide-free ID surface available for fluid-path devices.
Product Overview — Medical Grade NiTi Tube
Our superelastic Nitinol tube withstands up to 8% recoverable strain — making it the gold standard for self-expanding stent platforms, kink-resistant catheter shafts, and flexible endoscopic instrument bodies that must navigate tortuous anatomy without permanent deformation. The superelastic plateau stress can be tuned through composition and thermomechanical processing to deliver the exact radial force and crush resistance your device requires.
Every tube is fully traceable to its heat lot, with material certificates documenting chemical composition, transformation temperatures (DSC per ASTM F2004), tensile properties, and dimensional inspection. OD, ID, wall thickness, and ovality are verified with optical and laser micrometry — ensuring your laser cutting, electropolishing, or shape-setting process starts with dimensionally precise tubular stock.
Key Features & Benefits
| Feature | Benefit |
|---|---|
| Superelasticity — 8% recoverable strain | Kink-resistant, crush-recoverable tube for stent delivery systems, catheter shafts, and flexible endoscopic instruments. |
| Shape Memory Effect (SME) | Heat-activated expansion or contraction — enables self-expanding stent deployment and temperature-triggered actuation. |
| ASTM F2063 / ASTM F2633 Compliant | Meets strict chemical, mechanical, and biocompatibility requirements for vascular stents and implantable medical devices. |
| Ultra-Thin Wall — down to 0.015 mm | Minimizes device profile for neurovascular, coronary, and peripheral vascular applications where wall thickness is critical. |
| Oxide-Free ID Surface Available | Smooth internal bore for fluid-path devices, guidewire lumens, and drug-delivery catheters. |
| Controlled Af Temperature (±5 °C) | Consistent, predictable transformation behavior validated by DSC per ASTM F2004 for every lot. |
| Biocompatible — TiO2 Passive Layer | Natural titanium oxide surface resists corrosion in body fluids; nickel release well below ISO 10993 thresholds. |
| Wall Concentricity Verified | Optical micrometer inspection ensures uniform wall thickness for predictable laser cutting and consistent stent strut geometry. |
Technical Specifications
Dimensional Range & Tolerances
| Parameter | Range | Medical Tolerance | Industrial Tolerance |
|---|---|---|---|
| Outer Diameter (OD) | 0.2 – 25 mm | ±0.01 – 0.03 mm | ±0.05 – 0.1 mm |
| Inner Diameter (ID) | 0.1 – 8 mm | ±0.01 – 0.03 mm | ±0.05 – 0.1 mm |
| Wall Thickness | 0.015 – 2 mm | ±0.005 – 0.015 mm | ±0.02 – 0.05 mm |
| Length | 10 – 6000 mm | Customizable; standard cut lengths available | |
Physical & Mechanical Properties
| Property | Specification |
|---|---|
| Material | Nickel-Titanium (NiTi) Alloy — near-equiatomic |
| Nickel Content (Nominal) | 54.5 – 57.0 wt% (balance titanium) |
| Tensile Strength (UTS) | ≥ 1000 MPa (superelastic condition) |
| Elongation | ≥ 10% |
| Upper Plateau Stress (at 3% strain) | ≥ 380 MPa |
| Permanent Set (after 6% strain) | ≤ 0.2% |
| Recoverable Strain | Up to 8% |
| Active Af Temperature | −20 °C to +100 °C (typically <20 °C for room-temp superelastic) |
| Density | ~6.45 g/cm³ |
| Melting Point | ~1310 °C |
| Standards | ASTM F2063, ASTM F2633, ISO 5832-11, GB/T 24627 |
Surface Finish Options
Applications
Medical Devices
- Self-expanding vascular stents (coronary, peripheral, SFA)
- Stent delivery system shafts
- Neurovascular micro-catheters
- Endoscopic instrument bodies
- Guide catheter shafts
- Retrieval device sheaths
- Biopsy needle cannulae
- Drug-delivery catheter tubing
Aerospace & Defense
- Cryogenic fluid coupling sleeves
- Thermal actuator cylinders
- Deployable structure hinges
- Vibration-damping tubular mounts
- Satellite release mechanism sleeves
- Shape memory valve bodies
- Morphing structure actuators
Industrial & Consumer
- Microfluidic device tubing
- Robotic actuator cylinders
- Automotive thermal bypass valve sleeves
- Fire safety sprinkler trigger tubes
- Precision instrument shafts
- Flexible coupling sleeves
- Consumer electronics actuators
Why Choose Princeton Nitinol
VIM + VAR Melting
Double-melt process minimizes non-metallic inclusions (TiC, TiO2) — critical for thin-wall stent tubing where inclusions become stress concentrators.
Full Documentation Package
Certificate of conformance, DSC thermogram (ASTM F2004), tensile report, and dimensional inspection data with every shipment.
Wall Concentricity Control
Precision tube drawing with optical micrometer verification ensures uniform wall thickness — predictable laser-cut stent strut geometry from part one.
Custom OD/ID/Wall Combinations
Tube dimensions tailored to your device design. No need to compromise with off-the-shelf sizes.
R&D & Prototyping Support
Small-batch samples for proof-of-concept and design verification. Technical team available to discuss Af selection, laser cutting, and electropolishing parameters.
Global Shipping & Export Packaging
Tube-packed in protective containers with moisture barrier. DAP/FCA incoterms. Customs-compliant documentation worldwide.
Packaging & Available Forms
| Form | Description | Typical Packaging |
|---|---|---|
| Micro Tube (OD 0.2–1.0 mm) | Ultra-thin wall for neurovascular & coronary stents | Protective tube containers with end caps, individually sleeved |
| Standard Tube (OD 1.0–6.0 mm) | Precision-drawn for peripheral stents & catheter shafts | Tube-packed in cut lengths, vacuum-sealed with desiccant |
| Large Tube (OD 6.0–25 mm) | Heavy-wall for structural implants & industrial actuators | Individual protective wrapping, custom crate |
| Laser-Cut Preforms | Tube pre-cut to your stent pattern for evaluation | Custom compartment trays per customer specification |
Frequently Asked Questions
Nitinol tube is a hollow cylindrical form of nickel-titanium (NiTi) shape memory alloy, available in superelastic and shape memory grades. Superelastic tube springs back after deformation, ideal for self-expanding stent delivery systems, catheter shafts, and flexible medical device components. Shape memory tube recovers a preset shape when heated. OD ranges from 0.2 mm to 25 mm with wall thicknesses as thin as 0.015 mm, conforming to ASTM F2063 and ASTM F2633.
ASTM F2063 is the international standard for wrought nickel-titanium shape memory alloys for medical devices and surgical implants. For tube products, it governs chemical composition, transformation temperature methodology, and minimum mechanical properties. Many tube applications also reference ASTM F2633 for vascular stent tubing. Compliance is mandatory for medical device manufacturers submitting to FDA and EU MDR.
Superelastic (austenitic) tube is used above its Af temperature — it springs back after bending without heating, ideal for stent delivery systems, catheter shafts, and flexible endoscopic components. Shape memory (martensitic) tube is deformed cold and recovers its programmed shape upon heating, suitable for thermal actuators, deployable structures, and temperature-triggered release mechanisms.
OD range: 0.2 mm to 25 mm. ID range: 0.1 mm to 8 mm. Wall thickness: 0.015 mm to 2 mm (some up to 3 mm). Medical tolerances: ±0.01 to ±0.05 mm. Industrial tolerances: ±0.1 mm. Custom dimensions and tighter tolerances available on request. All dimensions verified with optical and laser micrometry.
We supply polished, pickled, bright annealed, and electropolished tube surfaces. Electropolished finish is recommended for medical stent and catheter applications — it reduces surface friction, improves fatigue life, and minimizes nickel ion release. Oxide-free inner diameter surfaces available for fluid-path applications. Custom surface requirements are welcomed.
Standard MOQ is 1 kg or 1 meter, whichever is greater. Small-batch samples and custom-cut lengths available for R&D and prototyping. Stock sizes ship in 5–7 business days. Custom dimensions and Af specifications delivered in 2–4 weeks. Volume pricing applies at 10 kg, 50 kg, and 100 kg+ tiers. Contact us for a detailed quotation with lead time.
Also available: Nitinol Alloy Wire ASTM F2063 | Nitinol Sheet & Plate ASTM F2063 | Nitinol Bar & Rod | Nitinol Spring | Shape Memory Flat Wire