4J42
4J42 alloy is a high-performance metal alloy, mainly composed of iron (Fe) and nickel (Ni). It belongs to the category of precision alloys or fixed expansion alloys. The nickel content of 4J42 alloy is carefully adjusted to obtain specific thermal expansion properties. In addition to iron and nickel, alloys may also contain small amounts of other elements to further improve their properties. Through precise heat treatment and processing technology, 4J42 alloy products with excellent properties can be obtained.
4J42
Product Description:
4J42 alloy is a high-performance metal alloy, mainly composed of iron (Fe) and nickel (Ni). It belongs to the category of precision alloys or fixed expansion alloys. The nickel content of 4J42 alloy is carefully adjusted to obtain specific thermal expansion properties. In addition to iron and nickel, alloys may also contain small amounts of other elements to further improve their properties. Through precise heat treatment and processing technology, 4J42 alloy products with excellent properties can be obtained.
Physical properties:
Melting point: 1430℃
Density: 8.12g/cm³
Resistivity: 0.61μΩ·m
Curie point Tc=360℃
Extreme chemical composition:
C | Mn | Si | P | S | Al | Ni | Fe |
≤0.05 | ≤0.80 | ≤0.30 | ≤0.020 | ≤0.020 | ≤0.10 | 41.5～42.5 | Balance |
Coefficient of expansion:
4J42 | average linear expansion coefficient ā,10-6/℃ | ||||||
20~100℃ | 20~200℃ | 20~300℃ | 20~400℃ | 20~450℃ | 20~500℃ | 20~600℃ | |
5.6 | 4.9 | 4.8 | 5.9 | 6.9 | 7.8 | 9.2 | |
characteristic:
Thermal expansion performance: The coefficient of thermal expansion (CTE) of 4J42 alloy matches that of hard glass, soft glass, ceramics and other materials. This property enables 4J42 alloy to achieve hermetic packaging with these materials through a glass-metal sealing process, which is particularly important in microelectronics and other fields that require high-precision packaging.
Mechanical properties: 4J42 alloy has good tensile strength in the soft magnetic state, which allows it to withstand certain mechanical stress and pressure and maintain the stability of its shape and structure.
Corrosion resistance: 4J42 alloy is able to maintain stable performance under high temperatures and highly corrosive environments, making it an ideal material for equipment working in harsh environments, such as aerospace, chemical and energy fields.
Electrical properties: 4J42 alloy has excellent electrical properties, including good electrical conductivity and magnetic properties, which makes it widely used in electronic equipment.
Processing properties: 4J42 alloy has good machining, electroplating and welding properties, which allows it to be made into complex shapes and structures through various forming and processing methods to meet different engineering needs.
Cost advantage: Compared with some other alloys (such as 4J29), 4J42 alloy does not contain expensive cobalt (Co) elements, so it has a cost advantage
Application areas:
Sealing soft glass, ceramics, etc., making leads, frames and sealed plugs for electron tubes, transistors and integrated circuits.
form:
Rod, tube, plate, strip and wire