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DLX 4J32 Invar Precision Alloy Wire for Medical Devices
DLX 4J32 (also known as Super Invar 32-5 or UNS K93500) is a premium nickel-iron-cobalt precision expansion alloy wire engineered for ultra-low thermal expansion. Manufactured by DLX Alloy, this controlled expansion wire delivers exceptional dimensional stability across wide temperature ranges, making it the ideal choice for high-precision medical devices where even minor thermal shifts can compromise accuracy.
- Overview
- Specification
- Features & Applications
- FAQs
- Recommended Products
Product Introduction Overview
DLX 4J32 (Super Invar 32-5 / UNS K93500) is a premium low-expansion precision alloy wire specifically formulated for environments where thermal stability is non-negotiable. With a nickel content of 31–33% and cobalt 4.5–5.5%, this advanced invar precision alloy wire exhibits a significantly lower coefficient of thermal expansion than standard Invar 36, especially in the -60°C to +80°C range critical for medical instrumentation. Manufactured by DLX Alloy with customizable wire diameters from 0.5 mm to 7.5 mm, it guarantees dimensional stability, thermal shock resistance, and long-term reliability in precision medical devices, diagnostic tools, and temperature-sensitive applications.
Product Features
- Ultra-Low Coefficient of Thermal Expansion (CTE): 0.35–0.63 × 10⁻⁶/°C (20–100°C) — far superior to standard Invar for temperature-invariant medical components.
- Exceptional Dimensional Stability: Maintains precise shape and size under thermal cycling, essential for medical sensors and imaging systems.
- High Thermal Shock Resistance: Withstands rapid temperature changes without deformation or cracking.
- Excellent Corrosion & Oxidation Resistance: Ensures longevity in sterile medical environments and vacuum/sealing applications.
- Superior Mechanical Properties: Tensile strength ~483 MPa, yield strength ~276 MPa, density 8.15 g/cm³ — strong yet machinable for custom medical device fabrication.
- Customizable Precision Wire: Diameters 0.5–7.5 mm (up to 10 mm available), coiled or spooled, vacuum-melted for purity and consistency in controlled expansion alloy wire.
Product Applications
The DLX 4J32 low thermal expansion alloy wire is trusted across the medical sector for components demanding absolute accuracy:
- Medical Imaging & MRI Equipment: Stable magnetic circuits and structural frames that resist thermal distortion.
- Precision Diagnostic Sensors & Probes: Temperature-compensated instruments for accurate readings in operating rooms and labs.
- Surgical Instrumentation: High-precision tools, endoscopes, and cryogenic medical storage systems requiring dimensional invariance.
- Glass-to-Metal Sealing in Medical Devices: Vacuum-sealed sensors and implantable components.
- Aerospace-Grade Medical Devices: Portable diagnostic tools and implants benefiting from the same ultra-low CTE used in satellite and aerospace precision systems.
Product FAQ
Q1: What makes DLX 4J32 Super Invar wire better than standard Invar 36 for medical devices?
A: DLX 4J32 (Super Invar 32-5) offers an even lower coefficient of thermal expansion (0.35–0.63 ppm/°C) in the critical -60°C to 80°C range, providing superior dimensional stability compared to standard Invar 36 — perfect for precision medical instrumentation and imaging systems.
Q2: What wire diameters are available for DLX 4J32 precision alloy wire?
A: Standard customizable sizes range from 0.5 mm to 7.5 mm (up to 10 mm possible). All diameters are supplied in coils or spools with tight tolerances for medical-grade fabrication.
Q3: Is DLX 4J32 Invar wire suitable for MRI and medical imaging equipment?
A: Yes — its ultra-low thermal expansion and stable magnetic properties make it ideal for maintaining precision in MRI components, sensors, and diagnostic devices where temperature fluctuations must not affect performance.
Q4: What certifications and quality standards does the DLX 4J32 controlled expansion alloy wire meet?
A: Produced under GB/T 15018 and equivalent to ASTM F1684 (UNS K93500), with vacuum induction melting for medical-grade purity, corrosion resistance, and consistent low CTE performance.
Q5: Can DLX 4J32 Invar precision alloy wire be used for glass-to-metal sealing in medical sensors?
A: Absolutely. Its matched expansion properties with glass make it excellent for hermetic sealing in vacuum medical devices, probes, and implantable components.
