Expansion Alloy 4J36
4J36, also known as Invar alloy, is highlighted by its ultra-low thermal expansion characteristics, while also possessing significant advantages in processing and environmental adaptability, as detailed below:
1. Extremely high thermal stability: This is its core advantage. It exhibits an extremely low coefficient of thermal expansion in the range of -250℃ to 200℃, approximately 1.5×10⁻⁶/℃ at 20-100℃. Its dimensions remain virtually unchanged with temperature variations, preventing component deformation caused by thermal expansion and contraction.
2. Excellent processing performance: It possesses good plasticity and toughness, making it compatible with various processing techniques such as stamping, cutting, and welding. It can be processed into various forms such as plates, strips, and rods, and can also be used to manufacture complex-shaped parts, meeting customized needs in different scenarios.
3. Balanced overall performance: It has a tensile strength of 450-600 MPa and moderate hardness, meeting the load-bearing requirements of most applications; it exhibits good corrosion resistance in dry environments at room temperature, and some versions can be fine-tuned with elemental adjustments to suit more complex working conditions. Its resistivity characteristics also make it suitable for some electromagnetic shielding applications.
4. Reliable preparation process: It mainly uses processes such as vacuum induction melting, which allows for precise control of composition and purity, reducing impurity inclusion. Combined with subsequent homogenization annealing and other treatments, it further ensures stable product performance, meeting the stringent material quality requirements of precision fields.
