Invar36 Precision Alloy Wire Supplier

Product Introduction Overview

Invar 36 (also known as Alloy 36, FeNi36 or 4J36) is a premium nickel-iron controlled expansion alloy wire containing approximately 36% nickel and 64% iron. Renowned for its ultra-low coefficient of thermal expansion (CTE), this precision alloy wire maintains dimensional stability across wide temperature ranges—from cryogenic conditions up to 500°F (260°C).

As a professional Invar 36 precision alloy wire supplier and China factory OEM manufacturer, we produce high-quality invar material wire with tight tolerances, custom diameters, and spooled packaging to meet global export standards. Whether you need bulk wholesale Invar 36 wire for aerospace or electronics, our direct factory pricing and strict quality control ensure reliable performance for all low thermal expansion applications.

precision alloy wire supplier

Precision Alloy Wire Manufacturer

Product Features

Ultra-Low Coefficient of Thermal Expansion (CTE): Approximately 1/10th that of carbon steel, ensuring minimal dimensional change in temperature-varying environments.
High-Precision Nickel-Iron Composition: 35-37% Ni balance Fe with controlled impurities for consistent low expansion performance.
Custom Wire Diameters & Forms: Available from 0.1mm to 10mm+ in bright annealed, hard-drawn, or spooled Invar 36 wire – fully customizable for OEM projects.
Excellent Machinability & Weldability: Easy to form, cut, and weld using standard processes without compromising low CTE properties.
Superior Stability for Precision Use: Maintains near-constant dimensions from cryogenic to moderate heat, ideal for controlled expansion alloy applications.
Factory-Direct Quality Assurance: ISO-compliant production at our China OEM factory with full material traceability and competitive wholesale pricing.

Product Applications

Invar 36 low thermal expansion wire is the preferred controlled expansion material for industries requiring absolute dimensional stability:

Aerospace & aircraft controls (valves, sensors, and structural components)
Optical & laser systems (mirrors, frames, and alignment tools)
Radio, electronic devices & thermostats (shadow masks, CRT components, and circuit elements)
Precision instruments & laboratory equipment (clocks, gauges, and measuring devices)
Cryogenic applications & composite tooling (molds, dies, and scientific apparatus)
Glass-to-metal sealing and motor valves

precision alloy wire supplier

Precision Alloy Wire OEM Supplier

Product FAQ

1.What is Invar 36 precision alloy wire and why is it called a low thermal expansion material?

Invar 36 is a nickel-iron alloy wire (36% Ni) engineered for ultra-low CTE—about one-tenth of ordinary steel—making it the top choice for any application where temperature changes must not affect dimensions.

2.What diameters and packaging are available for Invar 36 wire from your China factory?

We offer custom diameters from 0.1mm to 10mm+ in bright annealed, 1/4 hard, or fully hard conditions, spooled or straight lengths. Full OEM customization is available.

3.How does Invar 36 wire compare to Kovar or Super Invar?

Invar 36 provides the lowest expansion for general precision use; Kovar adds cobalt for glass sealing, while Super Invar offers even lower expansion but in a narrower temperature range.

4.Is Invar 36 wire suitable for cryogenic and high-temperature applications?

Yes—excellent stability from cryogenic temperatures up to ~260°C (500°F), perfect for aerospace, optical, and scientific instruments.

5.Can you provide OEM/ODM services and wholesale pricing as a China supplier?

Absolutely. As a direct China factory OEM manufacturer, we offer custom specifications, private labeling, and competitive bulk wholesale pricing with fast lead times.