Titanium Capillary Tube Grade 1 ASTM B861
Application of Titanium Capillary Tube Grade 1
Titanium Capillary Tube Grade 1 is widely used across multiple industries due to its exceptional corrosion resistance, biocompatibility, light weight, and excellent formability. Its extremely small inner diameter allows precise fluid control, making it ideal for sensitive and high-precision systems.
1. Refrigeration
Titanium Grade 1 capillary tubes are used in refrigerators, freezers, HVAC systems, and air conditioners to accurately regulate the flow of refrigerant.
As the refrigerant passes through the thin tube, it expands and cools efficiently, contributing to stable temperature control.
2. Medical
Titanium seamless capillary tubes are widely used in medical laboratories, diagnostics, and microfluidic devices.
Applications include:
Blood collection and analysis
Catheters and guide wires
Precision delivery of biological fluids
Titanium’s biocompatibility makes it safe for instruments in direct contact with the human body.
3. Chemical Analysis
Titanium capillary tubes are used in:
Gas chromatography
Separation of chemical components
High-temperature and corrosive analytical systems
Different compounds pass through the tube at varying speeds, enabling accurate separation and identification.
4. Manufacturing & Industrial Use
Titanium capillary tubes ensure precise flow control of oil, water, acids, and industrial process fluids.
Common uses:
Micro-fluid dosing
Instrumentation and control lines
Sampling lines for industrial analysers
Descriptions of Titanium Capillary Tube Grade 1
Titanium Capillary Tube Grade 1 is made from commercially pure titanium, offering:
Excellent corrosion resistance
High ductility
Lightweight and non-magnetic performance
Outstanding biocompatibility
Good thermal conductivity
These tubes are produced in various diameters and wall thicknesses, customised to meet the requirements of:
Medical instruments
Aerospace precision systems
Automotive sensors and fuel lines
Electronic components
Heat exchanger and condenser tubing
Titanium capillary tubes can be manufactured using cold rolling, hot rolling, extrusion, or precision drawing, depending on size and application.
They are then cut, polished, and bent to the required shape for final use.
Material Variants
Medical-grade titanium capillary tubes are typically available in:
Grade 1 – highest ductility
Grade 2 – stronger, similar corrosion resistance
Grade 5 (Ti-6Al-4V) – higher strength, used for surgical implants
ASTM B861 specifications can also be applied when required.
Chemical Composition & Mechanical Properties
Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| Gr1 | 240 | 170 | 24 |
| Gr2 | 345 | 275 | 20 |
Chemical Composition (wt%)
| Grade | Fe max | O max | N max | C max | H max | Others | Ti |
|---|---|---|---|---|---|---|---|
| Gr1 | 0.20 | 0.18 | 0.03 | 0.08 | 0.015 | — | Balance |
| Gr2 | 0.30 | 0.25 | 0.03 | 0.08 | 0.015 | — | Balance |
Advantages of Titanium Capillary Tube Grade 1
Ultra-lightweight and ideal for aerospace & medical applications
Non-magnetic—safe for MRI and sensitive electronic devices
Exceptional corrosion resistance in seawater, chlorine, acids, and industrial chemicals
High biocompatibility—ideal for implants, surgical instruments, and medical devices
High strength-to-weight ratio
Low thermal expansion and stable at varying temperatures
Excellent surface finish, suitable for precise fabrication and welding
Available in custom sizes, shapes, coils, and straight lengths
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