316SS-Al Bonded Bimetal CF Flanges

316SS to 6061-T6 Aluminum Bimetal ConFlat flanges offer users the unique ability to harness the properties of two different metal alloys in their UHV or XHV processes. 316SS/Al bimetal CF flanges are available in industry-standard sizes (mini 1.33″ to 12.0″), rotatable and fixed geometries, and various bolt hole types.

With a 316 stainless steel facing, 316SS-Al bimetal flange users can capitalize on an aluminum system connection while retaining industry-standard 316SS alloy benefits such as increased strength and excellent knife edge retention. Aluminum system connections provide increased vibration dampening, decreased outgassing paths, and greater thermal conductivity and diffusivity.

316SS-Al Bonded Bimetal CF Flanges find applications in industries such as petrochemicals, hydrogen-based energy systems, and semiconductor manufacturing, where corrosion resistance and mechanical strength are essential.

Aluminum Material Benefits   

  • Enhanced Thermal Conductivity: Aluminum boasts a thermal conductivity that is more than 10 times that of stainless steel, ensuring efficient heat transfer within your vacuum systems. 
  • Greater Thermal Diffusivity: Aluminum has a thermal diffusivity 17 times that of stainless steel, aluminum enables fast, uniform bakeouts, helping achieve UHV levels in less than 24 hours for most aluminum chambers. 
  • Superior Vibration Dampening: With a Young’s modulus approximately 1/3 of stainless steel, aluminum provides better vibration dampening, ensuring stable and reliable operations. 
  • Hydrogen Minimization: Aluminum reduces the risk of hydrogen-related issues in critical applications with 7 orders of magnitude less Hydrogen than stainless steel 
  • Magnetic Invisibility: Aluminum is magnetically invisible compared to stainless steel, making it an excellent choice where magnetic interference must be minimized. 
  • Low-Temperature Bakeout: Aluminum flanges support low-temperature bakeouts of 150°C, enabling efficient and controlled processes. 
  • Lower Outgassing Rates: Aluminum exhibits lower outgassing rates compared to stainless steel, contributing to a cleaner and more reliable vacuum environment.