4J36 Alloy: High-Expansion Alloy With Precise Thermal Control Capabilities

4J36 Alloy Product Description:

4J36 alloy, also known as Invar 36, is a nickel-iron alloy notable for its low coefficient of thermal expansion. Composed primarily of iron (Fe), nickel (Ni), and cobalt (Co), with a small amount of manganese (Mn), this alloy exhibits minimal expansion or contraction over a wide range of temperatures. This characteristic makes it particularly suitable for applications requiring precise dimensional stability under varying thermal conditions.

Key Features:

• Thermal Expansion: 4J36 alloy has a very low coefficient of thermal expansion, making it ideal for applications where dimensional stability is critical, such as in precision instruments.
• Mechanical Properties: It offers good machinability and can be welded and soldered, facilitating various fabrication processes.
• Electrical Resistivity: Exhibits moderate electrical resistivity, suitable for certain electrical applications.
• Curie Temperature: Typically around 450°C, indicating its stability in magnetic properties over a wide temperature range.
• Applications: Widely used in precision instrument components, thermostat rods, and bimetal strips where precise thermal control and dimensional stability are essential.

Applications:

• Precision Instruments: Used in scientific instruments, optical devices, and aerospace components requiring stable dimensions.
• Thermal Control Devices: Applied in thermostat rods, bimetallic strips, and other devices where accurate thermal expansion properties are crucial.
• Electrical Components: Utilized in electrical switches and contacts due to its stable electrical resistivity and thermal properties.

4J36 alloy is favored in industries such as aerospace, electronics, and scientific research for its reliable performance under extreme temperature changes and its ability to maintain dimensional integrity. Its unique thermal expansion characteristics contribute to its widespread use in applications demanding high precision and stability.

Here is the composition table for 4J36 alloy (Invar 36):