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expansion alloy 4J36, also known as Invar alloy, is a nickel-iron alloy with a very low coefficient of thermal expansion, which is widely used in fields with extremely strict thermal expansion requirements. The 4J36 alloy exhibits very low thermal expansion in the temperature range from room temperature to about 200°C, and is suitable for use in precision instruments, structural support of electronic components, optical equipment, and temperature-sensitive components in aerospace.

expansion alloy 4J36

产品详情

Similar grades at home and abroad

  • United States: Invar 36 (UNS K93600)
  • Germany: 1.3912
  • Japan: Nilo 36
  • France: FeNi36
  • international standards: ASTM F1684

chemical composition
4 J36 alloy is as follows:
-Nickel (Ni):36%
-Iron (Fe): balance
-Other elements: trace amounts of carbon (C), manganese (Mn), silicon (Si), etc.

physical properties
-Density: 8.1 g/cm & sup3;
-Melting point: 1430°C
-Coefficient of thermal expansion: approximately 1.2 x 10 +/°C in the temperature range of 20 - 100°C

mechanical properties
-Tensile strength: about 490 MPa
-Yield strength: about 240 MPa
-Ductility: Good, suitable for cold working and forming
-Hardness: HV 160 - 180

Application areas
-Precision instruments: used to produce equipment that requires high precision and low expansion, such as metering tools, clock parts, etc.
-Aerospace: Used for temperature-sensitive components in aircraft structures and satellites.
-Optical equipment: used to produce telescopes, laser devices and other components that require thermal stability.
-Power equipment: used in high-temperature and high-precision environments for temperature compensation components.

Supply Specifications
-Shape: bar, plate, strip, wire, etc.
-size: customized according to customer needs

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