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- Low coefficient of expansion: 4J42 alloy has a very low coefficient of thermal expansion in a specific temperature range, which means that its size changes very little when the temperature changes, thus ensuring the accuracy and stability of the device. This feature makes it widely used in electronics, aerospace and other fields.
- Good mechanical properties: The alloy exhibits high tensile strength and yield strength, as well as good elongation and hardness. This allows it to withstand high mechanical loads without deformation or fracture. In the aerospace and automotive industries, such high strength characteristics ensure the stability and safety of parts under complex working conditions.
- Excellent corrosion resistance: 4J42 alloy is resistant to a variety of corrosive media and is suitable for use in harsh environments. This characteristic prolongs the service life of the equipment and makes it widely used in chemical industry, electric power and other fields.
- Stable physical properties: Physical properties such as thermal conductivity, resistivity and specific heat capacity remain stable at high temperatures, ensuring the performance consistency of the alloy in different working environments.
| Element | C | P | S | Mn | Si | Al | Co | Ni | Fe |
| % | ≤0.05 | ≤0.02 | ≤0.02 | ≤0.80 | ≤0.30 | ≤0.10 | ≤1.0 | 41.5-42.5 | Bal |
| Density | Melting | Yield strength | Tensile strength | Hardness |
| 8.14g/cm³ | 1427-1450°C | 450MPa | 550MPa | HB 170-230 |
- Electronics industry: Used in the manufacture of transistor tube bases, integrated circuit packages and electronic tubes. Its low coefficient of thermal expansion and excellent electrical conductivity ensure the stability and reliability of electronic components.
- Aerospace: Used in the manufacture of precision instruments, sensor casings and missile components. These components need to withstand temperature and pressure changes in extreme environments, and the high strength and low coefficient of expansion of 4J42 alloy make it an ideal choice.
- Instrumentation: Used to manufacture precision measuring instruments, clock components and various control devices. Its high precision and stability meet the strict requirements of instrumentation for accuracy.
- High temperature environment: In electric power, metallurgy and other fields, 4J42 alloy is used to manufacture parts such as springs and wires at high temperatures, as well as parts of high temperature furnaces, continuous casting machines and other equipment. Its excellent high temperature resistance and stability improve the operating efficiency and reliability of the equipment.
- Chemical industry: Due to its corrosion resistance to a variety of chemical media, the alloy is also used in the manufacture of chemical equipment, reactors and pipes.
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Nickel alloy,
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Corrosion-resistance alloy,
Heat-resistance steel