Thank You for Your Attention on Beiye!
4J80 Non-Magnetic Controlled Expansion Alloy is engineered for applications demanding precise thermal stability and non-magnetic properties. Featuring a balanced composition of molybdenum, tungsten, copper, and iron, this non magnetic alloy offers a controlled linear expansion coefficient of 12.7–13.6 × 10⁻⁶/°C across 25°C to 600°C. With a low magnetic permeability of ≤1.263, 4J80 is ideal for non-magnetic sealing parts in electronic devices and vacuum or edge welding of high alumina ceramics, ensuring reliable performance in sensitive environments.
Non-magnetic sealing parts of electronic device
Vacuum seal welding or edge welding of high alumina ceramic materials
Mo | 9.5～11.5 |
| Cu | 1.5~2.5 |
W | 9.5~11.5 |
Fe | bal. |
| 25℃-500℃ | 12.7~13.3 |
| 25℃-600℃ | 13.0~13.6 (α, 10-6℃-1) |
Magnetic permeability μ16000(μH/m) | ≤1.263 |
Feel free to contact Beiye for a quote on the 4J80 alloy and discover our full precision alloy and supply capabilities.
