Invar is typically machined, but what many people don’t know is that it can be cast.
Invar 36 Success
Invar 36 maintains nearly constant dimensions at temperatures below -150 degrees Celsius up to 260 degrees Celsius.
Who Should Use Invar 36?
Invar Industry Applications
Invar can be used in a variety of applications within the aerospace, medical, and consumer electronics industries. But where superalloys with low CTE are really starting to outperform other metals is in technologies within the automotive industry. As autonomous vehicles rise in popularity, sensors, radars, and cameras become increasingly advanced and critical to the function of the car. LiDAR, an acronym for light detection and ranging, uses light waves from a laser to calculate how long it takes for the light to hit an object or surface and reflect back to the scanner—determining the distance of surrounding objects. An alloy with near constant dimensions and long-term dimensional stability, such as Invar 36, is extremely important in such intricate devices. Alternative alloys, like Kovar, with low CTE are also viable options for casting LiDAR sensors. Investment casting is a cost-effective solution compared to machining LiDAR parts from solid.
|Material||Units||Invar 36||304 Stainless Steel|
|Thermal Expansion Coefficient||x 10-6 K-1||1||14.70|
|Thermal Conductivity||W/m K||10.40||16.20|
|Specific Heat||W s/kg K||515||500|
|Thermal Diffusivity||10-6 m2/s||2.60||4.10|
|Thermal Distortion (Steady State)||µm/W||0.10||0.91|
|Thermal Distortion (Transient)||s/m2K||0.38||3.68|
What are the Advantages of Invar 36?
The most obvious advantage of Invar 36 is its ability to hold dimensions at cryogenic temperatures. Aside from that, Invar 36 looks and feels similar to steel. It also has outstanding weldability and machinability. Invar can also be created with customized chemistries to better meet the strength and hardness needs of customers.
Whatever your situation, our expert engineering staff is ready to listen. With 30 in-house engineers, we partner with you on every project to ensure your component is the highest quality possible. today to get the conversation started.
1* Invar 36 is a trademark of Carpenter Technology, Reading PA
2* Nilo 36 is a trademark of Special Metals Corporation, USA
3* Invar is a trademark of Imphy Alloys, France