52 Nickel Alloy / 42 Alloy Small Diameter Tubing

52 Nickel Alloy / 42 Alloy Small Diameter Tubing

Thermal Expansion Control & Hermetic Sealing Performance from International Tube

At International Tube, we produce precision 52 Nickel Alloy / 42 Alloy small diameter tubing, engineered for critical applications requiring low thermal expansion, excellent dimensional stability, and reliable glass-to-metal or ceramic-to-metal sealing. These alloys—typically composed of 52% nickel and 48% iron (UNS K94800) or 42% nickel and 58% iron (UNS K94100)—are often selected based on their controlled coefficient of thermal expansion (CTE), closely matched to glass, ceramics, or semiconductors.

These controlled expansion alloys offer exceptional performance in high-reliability environments, including hermetic sealing, microelectronic packaging, and aerospace systems. Their magnetic properties, combined with strength and thermal consistency, make them a preferred choice for mission-critical components.

52 Nickel / 42 Alloy Tubing Features & Applications

At International Tube, our 52 and 42 Nickel Alloy tubing is manufactured to meet exacting standards and is commonly used in:

• Glass-to-metal and ceramic-to-metal hermetic seals

• Semiconductor device housings and feedthroughs

• Aerospace and defense sensor enclosures

• Battery and capacitor canisters

• Telecommunications and fiber optic components

• Microelectronic and hybrid circuit packaging

• Precision instrumentation and sensor tubes

Our small-diameter tubing is produced using high-purity strip stock, plug drawn in coil form, and annealed as needed to meet required temper specifications. Tubing is available in both straight lengths and continuous coil form, allowing for integration into complex assemblies or automated production environments.

When your project demands unmatched dimensional stability, thermal control, and hermetic reliability, International Tube delivers 52 and 42 Nickel Alloy tubing solutions built for the most exacting applications.