new material
Expansion Alloy 4J36 (Invar Alloy) is a high-performance material known for its extremely low coefficient of thermal expansion, excellent dimensional stability, and good mechanical properties. This alloy is widely used in various industries, including aerospace, precision instruments, and cryogenic engineering, where it serves in critical components exposed to demanding environments. Its unique properties make it ideal for applications requiring minimal thermal expansion, durability, reliability, and high performance.
Product Overview
4J36, also known as Invar 36 alloy, is a special iron-nickel alloy with an ultra-low coefficient of thermal expansion. It exhibits an extremely low linear thermal expansion coefficient within the 20°C to 100°C temperature range. This alloy is widely used in applications that require dimensional stability, such as high-precision instruments, gauge parts, and bimetallic strips. It shows minimal volumetric change when subjected to temperature variations, making it an ideal material for scientific research, precision equipment, and high-temperature applications.
Features
- Ultra-low Expansion Coefficient: The alloy's expansion coefficient is extremely low in the 20°C to 100°C range, ensuring dimensional stability under temperature changes.
- High Stability: Excellent thermal stability, ideal for applications that require precise size control.
- Good Mechanical Properties: High strength and durability, suitable for long-term use.
Applications
- Precision Instruments: Widely used in instruments and gauge parts that require dimensional stability.
- Bimetallic Strips: Suitable for manufacturing bimetallic strips in heating elements.
- Resonance Cavities: Ideal for devices such as resonant cavities where minimal temperature variations are critical.
- High-Precision Equipment: Used in scientific research and precision manufacturing, especially in temperature-sensitive applications.
| C | Si | P | S | Mn | Ni | Fe |
| Not more than（≤） | ||||||
| 0.05 | 0.3 | 0.02 | 0.02 | 0.20-0.60 | 35.0-37.0 | Balance |
| Heat Treatment Procedure | Average Linear Expansion Coefficient (ā)/（10-6/℃） | |
| 20-100℃ | 20-300℃ | |
| Heat the semi-finished sample to 840℃ ±10℃, hold for 1 hour, then quench in water. After that, process the sample into the finished product and hold at 315℃ ±10℃ for 1 hour, followed by furnace cooling or air cooling. | ≤1.5 | --- |
