Platinum-Iridium (Pt-Ir) Alloy Tubes are premium materials
engineered for applications that demand exceptional chemical
stability, high-temperature resistance, and mechanical reliability.
Typically composed of 90–97% platinum and 3–10% iridium, these
tubes combine platinum’s corrosion resistance with iridium’s
enhanced hardness, ensuring long-term performance in harsh
laboratory, industrial, and aerospace environments.
DLX produces Pt-Ir Alloy Tubes using vacuum induction melting,
precision extrusion, and cold drawing to achieve tight dimensional
tolerances, uniform microstructure, and superior purity. These
tubes are particularly suitable for thermocouples, reference
electrodes, and high-temperature laboratory equipment, where both
chemical inertness and mechanical stability are essential.
Applications
Pt-Ir Alloy Tubes are widely used in precision industries,
including:
Thermocouples: Protective sheaths for high-temperature
thermocouples used in furnaces, turbines, and chemical processing.
Electrodes: Reference and working electrodes in electrochemical and
analytical applications.
Laboratory Equipment: Crucibles, electrodes, and high-temperature
gas sensors.
Aerospace: Temperature sensors and instrument components operating
under extreme conditions.
Medical Devices: Components for surgical and diagnostic instruments
requiring biocompatibility.
Energy Industry: High-temperature probes and corrosion-resistant
measurement devices.
Material Advantages
Excellent corrosion and chemical resistance in acids, oxidizing
atmospheres, and high-temperature gases.
Stable mechanical properties across a wide temperature range (up to
1800°C).
Superior hardness and wear resistance compared to pure platinum.
High electrical conductivity suitable for electrochemical
applications.
Non-reactive and biocompatible, ideal for medical and lab
applications.
Dimensional stability with minimal thermal expansion.
Long service life with minimal degradation under repeated thermal
cycling.
Compatible with microfabrication and precision forming processes.
The use of Pt-Ir alloy tubes in thermocouples and electrodes
continues to grow as industries demand higher-precision sensors and
longer-lasting laboratory equipment. Miniaturization of sensors in
aerospace, energy, and medical technologies increases the need for
tubes with consistent mechanical properties and corrosion
resistance.
In the medical and analytical sectors, the shift toward implantable
and long-life devices requires alloys that are both biocompatible
and mechanically robust. Pt-Ir alloys fulfill these requirements,
offering superior fatigue resistance and stable electrical
conductivity.
Meanwhile, sustainability and resource efficiency have become key
factors. DLX has implemented a closed-loop recycling system for
platinum and iridium scrap, reducing environmental impact while
maintaining alloy purity. This eco-conscious approach is
increasingly valued in research and industrial markets globally.
Comparison Table
| Parameter | Pure Platinum Tube | Pt-Ir Tube (90Pt–10Ir) | DLX Pt-Ir Tube |
|---|
| Composition | 99.95% Pt | 90% Pt / 10% Ir | Custom (90–97% Pt / 3–10% Ir) |
| Hardness (HV) | 60–80 | 120–150 | 140–160 (Optimized) |
| Melting Point (°C) | 1769 | 1828 | 1825–1830 |
| Tensile Strength (MPa) | 130–180 | 250–300 | 280–320 |
| Electrical Resistivity (µΩ·cm) | 10.6 | 18.0 | 17.5–18.5 |
| Corrosion Resistance | Excellent | Excellent | Superior, lab-certified |
| Operating Temperature (°C) | Up to 1000 | Up to 1800 | Up to 1850 |
| Applications | Electrodes, lab tubes | Thermocouples, electrodes, sensors | Precision thermocouples, reference electrodes, high-temp probes |
DLX Company Strength – Why DLX Pt-Ir Tubes Stand Out
DLX specializes in high-purity, high-performance Pt-Ir alloys
tailored for precision applications. Our tubes combine mechanical
strength, thermal stability, and chemical inertness, offering
unmatched reliability in demanding conditions.
Using proprietary vacuum induction melting and advanced cold
drawing, DLX ensures uniform microstructure and minimal inclusions,
critical for consistent electrical and mechanical performance. Our
quality control includes spectral analysis, microstructure
inspection, and dimensional verification to guarantee precision for
sensitive applications.
DLX also supports custom dimensions and compositions. Whether
customers require ultra-thin sheaths for micro-thermocouples or
high-strength tubes for high-temperature sensors, we provide
tailored solutions that outperform conventional offerings.
Sustainability is a key differentiator. DLX’s recycling program
allows platinum and iridium scrap from both production and customer
returns to be recovered, refined, and reused, reducing costs and
environmental impact. This integrated approach supports a reliable
global supply chain for laboratories, aerospace, medical, and
energy customers.
About Us:
Our 12,000㎡ factory is equipped with complete capabilities for
research, production, testing, and packaging. We strictly adhere to
ISO 9001 standards in our production processes, with an annual
output of 1,200 tons. This ensures that we meet both quantity and
quality demands. Furthermore, all products undergo rigorous
simulated environment testing including high temperature, high
pressure, and corrosion tests before being dispatched, ensuring
they meet customer specifications. For all our clients, we offer
timely and multilingual after-sales support and technical
consulting, helping you resolve any issues swiftly and efficiently.
Client Visits
Building Stronger Partnerships
We support all kinds of testing:
1. What is the typical composition of DLX Pt-Ir Alloy Tubes?
Our standard composition is 90% platinum and 10% iridium, but we
offer custom ratios from 90–97% platinum based on application
needs.
2. Why use iridium in platinum tubes?
Iridium improves hardness, wear resistance, and high-temperature
stability, enhancing performance in extreme environments.
3. What are the main applications of Pt-Ir tubes?
They are widely used for thermocouples, reference electrodes,
high-temperature probes, and laboratory equipment requiring
chemical stability.
4. Can DLX provide custom dimensions?
Yes. We can customize tube diameters, wall thicknesses, and lengths
with ultra-tight tolerances for precision instruments.
5. Are Pt-Ir tubes biocompatible?
Yes, our Pt-Ir alloys are non-toxic and biocompatible, suitable for
medical and analytical instruments.
6. How do Pt-Ir tubes perform at high temperatures?
They maintain mechanical and chemical stability at temperatures up
to 1850°C, ideal for thermocouple and high-temperature sensor
applications.
7. Does DLX offer recycling or buy-back programs for Pt-Ir scrap?
Yes, our closed-loop recycling program allows customers to return
alloy scrap for refining and reuse.
8. What certifications does DLX maintain?
Our production meets ISO 9001 and ISO 13485 standards, ensuring
quality and reliability for industrial and medical applications.
