4J42 Precision Iron Nickel Alloy Strip 8.12 g/cm3 For Electron Tubes

Product Specification

Soft Magnetic Precision Alloy 4J42 Fe-Ni Alloy Strip

Product Details

My country's Pomeranian number is 1JXX. Among them, J means "precision alloy", "1" means soft magnetism, and the number on the back permalloy surface is the serial number, which usually indicates the nickel content in the alloy. For example 1J50, 1J851 and so on. Permalloy has high magnetic permeability, so it is often used in the iron core of medium and high frequency transformers or devices with strict requirements on sensitivity, such as high frequency (tens of KHz) switching power supply transformers, precision transformers, leakage switch transformers, Magnetic shield, yoke, etc.

The 4J42 alloy is a Fe-Ni-based fixed expansion alloy, and its coefficient of thermal expansion (CTE) is matched with that of hard glass, soft glass, and ceramics, and can be formed into a hermetic package by a glass-metal sealing process; it is compatible with commonly used Al2O3, BeO, LTCC, The CTE of circuit substrates such as AlN is relatively close; the magnetic and electrical properties are excellent; the machining, plating and welding properties are good; One of the commonly used materials for metal encapsulation shells of microelectronic products.

4J42Invar (Invar) alloy belongs to the constant expansion alloy category, and has a similar linear expansion coefficient with soft glass and ceramics in a certain temperature range. Since it does not contain the scarce element Co, the price is relatively cheap, and it has gradually replaced Kovar alloys and is widely used in electrical vacuum components such as launch tubes, oscillator tubes, ignition tubes, magnetrons, electron tubes, transistors, sealed plugs, relays, integrated circuits Glass sealing of lead wires, chassis, shells, brackets, etc.

1. Physical properties:

Density: 8.12 g/cm3

Melting point: 1430 ℃

Elastic modulus: 147GPa

Thermal conductivity: 12.6w /(m•℃)

Hardness (HV) : 135kgf/mm2

Coefficient of thermal expansion (20-100℃) : 5.6×10-6/℃

Resistivity: 0.61 mu Ω, m

2. Main features:

The expansion coefficient and Curie temperature increase with the increase of nickel content. By adjusting nickel content, soft glass with different expansion coefficients can be matched within a given temperature range.

3. Examples of application:

Used for sealing with soft glass and ceramics, making leads, frames and sealing plugs for electron tubes, transistors and integrated circuits.

4. Chemical composition:

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FAQ

1.Are you trading or manufacturer ?
We are company,and we have our own factory

2.How long is your delivery time?

3.Do you provide samples ? is it free or extra ?
Yes, we could offer the sample for free charge but do not pay the cost of freight.
If you have another question, pls feel free to contact us