Invar alloy, also known as low expansion alloy and Yin steel, is a magnetic metal alloy composed of iron (Fe) and nickel (Ni). The main components are 36% nickel and 64% iron, with a face-centered cubic structure. The outstanding advantage of Invar alloy is its extremely low thermal expansion coefficient. In addition, it has the characteristics of low thermal conductivity, high toughness, high cross-sectional shrinkage, good ductility, low strength and hardness, and good plasticity. It is an important structural material.
Iron and nickel both have positive thermal expansion characteristics, but when they are combined in a certain proportion, they will form a material that can tenaciously show almost "zero thermal expansion" in a large range of temperature and pressure. This abnormal phenomenon is called the Invar effect. This characteristic makes this alloy very suitable for scenes with extremely high precision requirements, such as manufacturing parts for clocks, telescopes and other precision instruments. Its application range is:
1. Precision instrument field: Invar alloy is often used to manufacture structural parts, support parts and precision parts in precision instruments and optical instruments, such as astronomical telescopes, optical instruments, measuring instruments, etc.
2. Aerospace: Invar Alloy Machined Parts can be used for structural parts, guide systems and instruments in aerospace devices to ensure dimensional stability and precision in high and low temperature environments.
3. Chemical industry: Invar alloy is often used in seals, pipes, valves and pumps in chemical equipment to resist erosion by high temperatures and corrosive media.
4. Electronics: Invar Alloy Machined Parts can be used to manufacture semiconductor equipment, electronic components and thermal sensors to maintain dimensional stability and precision.
