4J46 Rod Controlled Expansion Alloy Bar Fe Ni Alloy for Glass and Ceramic Sealing

Product Description

4J46 alloy rod is a Fe-Ni controlled expansion alloy with about 46% nickel, designed for glass-to-metal and ceramic-to-metal sealing applications. Its thermal expansion coefficient matches that of hard glass and ceramics, ensuring excellent hermetic sealing and reliability.

This alloy features stable expansion characteristics, good machinability, and high sealing performance, making it widely applied in semiconductor packaging, vacuum tubes, relays, sensors, aerospace devices, and precision electronic components.

Key Features

• Fe-Ni controlled expansion alloy (Ni ~46%)

• Excellent sealing with ceramics and hard glass

• Reliable thermal expansion stability

• Good machinability and polishability

• Supplied in rods, wires, sheets, customized forms

Typical Applications

• Glass-to-metal sealing

• Ceramic-to-metal sealing

• Semiconductor packaging bases

• Relays, sensors, vacuum tubes

• Aerospace and defense electronic devices

• Hermetic sealing in precision instruments

Chemical Composition (%)

Physical and Performance Properties

Available Specifications

Huona (Shanghai) New Material Co., Ltd. Was established in 2008, currently have three divisions: Magnesium Division, Thermal Spray Division and Functional Material Division.

Magnesium Division produces magnesium metal products. Various models of high-quality magnesium alloy plate, magnesium rods, high-purity magnesium, magnesium plate, magnesium die casting, magnesium extrusion profiles and other metal magnesium and deep processing products.

Thermal spray wire Division offers a wide variety of pure metal and metal alloy wires, including nickel-, iron-, aluminum-, and zinc-based wires for thermal spray projects.

Fuctional Material Division supply electronic packaging COMPONENTS(GTMS, CTMS), soft magnetic alloys and bimetal strip.

Our company is certified by ISO9001 quality system and ISO14001 environmental protection system.

Mission Statement

We try our best to understand and utilize information within the environment. With this competency, we assist customers to create added value and contribute to the development of industry and healthy living.

We strive for "Best, " welcome challenges, and are relentless till we deliver products and solutions.