Nickel titanium alloy (NiTi) wire -- a shape-memory superelastic alloy used for biomedical stents, orthodontic archwires, eyeglass frames and actuator systems. Distinct from pure titanium wire.
| Parameter | Supply Reference | Custom Supply Range |
|---|---|---|
| Composition | Equiatomic Ni 50 at% / Ti 50 at% (Nitinol). Variants: Nickel-rich (NiTi B), Titanium-rich (NiTi C) | Custom composition per application specification |
| Wire Diameter | Per application -- typical biomedical 0.05 – 2.0 mm; industrial 0.1 – 5.0 mm | Custom diameter within feasible drawing range |
| Tolerance Class | Per application -- biomedical applications typically require tighter tolerances | Tolerance confirmed per drawing |
| Transformation Temperature | Austenite finish (Af) and martensite start (Ms) temperatures are critical design parameters, determined by composition and heat treatment | Per application -- requires full specification |
| Surface Condition | As-drawn, annealed, polished, passivated (for biomedical) | Custom surface per specification |
NiTi alloy wire and pure titanium wire are two fundamentally different product categories with different applications, properties and production routes.
Nickel-titanium intermetallic alloy (roughly 50% Ni / 50% Ti). Exhibits shape-memory effect and superelasticity. Primarily biomedical (stents, guidewires, archwires) and actuator applications. Not covered by ASTM B863.
Commercially pure titanium (Grades 1 through 4) or conventional titanium alloys (Grade 5, Grade 7, Grade 9, Grade 23). Primarily welding filler, mesh feedstock, pin stock and industrial component applications. Covered by ASTM B863.
NiTi alloy wire is a specialty intermetallic product that is fundamentally different from pure titanium and conventional titanium alloys. It is not directly covered by ASTM B863 (which covers commercially pure titanium and titanium alloy wire for industrial applications). Other specification references may apply depending on the specific industry and application, for example aerospace or biomedical device standards. The specific standard and documentation requirements should be identified at the inquiry stage.
For NiTi alloy wire orders, the critical technical parameters go well beyond wire diameter and tolerance. They include: precise chemical composition, transformation temperatures (Af and Ms), heat treatment specification, tensile properties, superelastic plateau strain, surface finish and passivation requirements, and packaging for clean-room environments in biomedical applications.
NiTi alloy wire applications leverage its unique shape-memory and superelastic properties -- properties that no pure titanium or conventional titanium alloy can provide.
Medical stents (self-expanding and balloon-expandable), guidewires, orthodontic archwires, orthopedic implants and surgical tools. Biocompatible NiTi grades require passivation and may need clean-room packaging.
Superelastic NiTi alloy wire for flexible eyeglass frame bridges and temples that return to shape after bending.
Thermally driven shape-memory actuators for deployable structures, valves, latches and specialty motion control systems in aerospace and industrial equipment.
Shape-memory alloy (SMA) actuators for micro-robotics, flexible actuators and specialized automation systems where the silent and compact nature of SMA actuation is advantageous.
Documentation for NiTi alloy wire must cover both the wire geometry and the NiTi-specific alloy properties that determine its functional behavior.
No. NiTi wire is a nickel-titanium intermetallic alloy containing roughly equal parts nickel and titanium. It exhibits shape-memory effect and superelasticity. Pure titanium wire (commercially pure titanium grades 1 through 4, or conventional titanium alloys like Grade 5) does not exhibit these properties. They are different product categories with different production routes, specifications and applications.
No. ASTM B863 covers commercially pure titanium and conventional titanium alloy wire for industrial applications. NiTi alloy wire is a specialty intermetallic alloy with fundamentally different properties. It is not directly covered by ASTM B863. The specific standard or specification reference for NiTi wire should be identified based on the application.
NiTi alloy wire is a specialty material with highly application-specific composition, diameter, tolerance and heat treatment requirements. It is typically produced to order. Availability and lead time must be confirmed per inquiry against the full specification.
A complete NiTi wire inquiry should include: composition variant, wire diameter and tolerance, transformation temperatures required, wire form (coil / straight / spool), surface finish requirement, quantity and intended application. For biomedical applications, please also specify any applicable packaging, passivation or biocompatibility requirements.
To receive an accurate quotation, please provide as many of the following details as possible: composition variant, wire diameter and tolerance, transformation temperature requirement (Af, Ms), wire form, surface condition, quantity and intended application. If you have a drawing or full technical specification sheet, please share it with our sales team.
Helpful details: Composition Variant (equiatomic / NiTi B / NiTi C), Diameter, Tolerance Class, Transformation Temp (Af, Ms), Form (coil / straight / spool), Surface Condition, Quantity, Application, Drawing / Specification
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