I have a design engineer who wants the thinnest solder joint possible between to parts. These parts will carry no current and can be either nickel or tin plated on the outer surface. What is the thinnest solder joint that will not fail. Unit will see large amounts of vibration, but very little stress or shear. CTE mismatch will be small (both parts are plated iron alloys). Thanks in advance for your help. Aric Parr [log in to unmask]