Wuxi Nickel New Material Co., Ltd
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China,Wuxi ,Jiangsu
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- Fatigue Resistant Biocompatible Ultra-Thin Wall Nitinol Tube for Medical and
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Product Specification
Nitinol Tube Fatigue Resistant Shape Memory Nickel-Titanium Tubing for Aerospace Thermal Actuator & Orthopedic Implant Hardware
1.Product Description
Fabricated via double vacuum melting and multi-pass micro cold drawing, this ultra-thin wall nitinol tube maintains strictly controlled nickel-titanium atomic ratio to satisfy ASTM F2063 biocompatibility thresholds. The uniform seamless lumen eliminates inner burrs, drastically lowering friction during guidewire and contrast medium delivery inside narrow human blood vessels. Tunable superelastic plateau matches soft vascular tissue modulus to avoid vessel wall abrasion during long interventional procedures. Electropolished surfaces suppress ion precipitation and bacterial adhesion, while precisely stabilized transformation temperatures deliver predictable self-expansion performance for micro stents and occlusion devices. Optimized micro dimensional tolerances support cleanroom laser machining for minimally invasive medical components across Western and European clinical R&D labs.
2.Full Calibrated Parameter Table
| Test Category |
Standard Spec Value |
Supplementary Industry Remarks |
| Chemical Composition (wt%) |
Ni: 54.5–57.0, Ti: Balance; C ≤0.005, Fe ≤0.025, O+N ≤0.05, H ≤0.002, Co/Cu/Cr ≤0.005 |
VIM-VAR medical clean melt grade |
| Ultimate Tensile Strength |
≥1070 MPa (155 ksi) |
Annealed delivery state |
| Minimum Fracture Elongation |
≥10% |
Room temperature tensile testing |
| Max Permanent Set after 6% Strain |
≤0.3% |
Critical for long-term implant stability |
| Recoverable Superelastic Strain |
6–8% |
Room-temperature superelastic variant |
| Austenite Finish Temp (Af) |
-10℃ ~ +15℃ |
Custom heat treatment for tailored transformation |
| Alloy Density |
6.5 g/cm³ |
Core physical density of NiTi alloy |
| Melting Temperature |
1310 ℃ |
High thermal stability for aerospace use |
| Standard Outer Diameter Range |
0.15mm – 12mm |
Micro hypotube to structural tubing |
| Standard Wall Thickness |
0.02mm – 1.0mm |
Tolerance ±0.005mm for precision machining |
| Mandatory Executive Standards |
ASTM F2063, ISO 10993, ISO 13485 |
Biomedical & aerospace global regulatory benchmarks |
| Available Surface Finishes |
Electropolished, Passivated, Bright Drawn |
Low-friction biocompatible surfaces |
3. Advantage
- Burr-free seamless inner lumen design cuts flow resistance for smooth contrast and instrument delivery in narrow neurovascular channels
- Tissue-matching elastic modulus reduces vessel injury risks during repeated device navigation inside fragile human microvasculature
- Ultra-low impurity vacuum melting technology extends cyclic fatigue lifespan for permanent micro implant structures
- Custom Af temperature calibration enables self-expansion matching human physiological temperature for interventional stent deployment
- Micro precision dimensional control fits cleanroom laser cutting, shaping and electropolishing post-processing workflows
- Passivated & electropolished dual surface treatment inhibits nickel ion release and microbial adhesion inside bodily fluid environments
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4. Application
This ultra-thin wall nitinol hypotube serves as core raw semi-finished material for neurovascular stents, cerebral embolization devices, micro catheter shafts and peripheral vascular intervention components. It also applies to minimally invasive urological and biliary endoscopic delivery systems. Medical R&D teams, clinical device labs and component processors across North America and Europe adopt this alloy tubing for high-precision low-trauma surgical equipment development.
5. FAQ
Q1: What advantages does seamless nitinol hypotube own over welded thin-wall tubing for neuro procedures?
A: Weld seams generate sharp inner edges that scratch fragile vessel linings, while seamless drawn nitinol tube delivers smooth continuous lumen to eliminate tissue abrasion risks during navigation.
Q2: Can ultra-micro outer diameter below 0.3mm be customized for ultra-fine intervention instruments?
A: All OD and wall thickness dimensions can be adjusted to ultra-micro sizes to match ultra-fine catheter and micro stent design drawings.
Q3: Does this micro nitinol tube pass full biocompatibility testing for permanent intracranial implants?
A: All batches complete ISO 10993 cytotoxicity, sensitization and corrosion testing to meet permanent intracranial implant access standards.
Q4: How to adjust shape recovery temperature to match human body environment?
A: Targeted low-temperature heat treatment calibrates Af temperature to near 37℃ for automatic self-expansion once implanted inside human tissue.
Company Details
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Business Type:
Manufacturer
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Total Annual:
20000000-80000000
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Employee Number:
50~500
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Ecer Certification：
Verified Supplier
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