Aluminum to Stainless Steel Transitions
EBARA's new Aluminum to Stainless Steel Transitions provide a reliable UHV seal for aluminum vacuum systems. An explosion bonded composite of aluminum, stainless steel and two other UHV materials make these transitions leak tight at UHV pressures. Transitions are welded to a stainless steel CF flange as a complete unit ready to weld to your aluminum chamber or beamline, or the transition can be purchased separately for welding to your own CF flange.
The explosion bonds have been tested for tensile, shear and thermal stress. Testing included thermal quenching from 773÷K to 77°K. This process has shown vacuum integrity to better than 5 x 10-10 standard cc per second with wall thickness as thin as 0.025". Each unit is thermally cycled to 300°C. Helium leak testing is done before and after thermal cycling.