Frank
Devcon has a 45,000 psi tensile strength, it's fun stuff, as it is made to replace / fill (buy buliding up and reworking worn) 6000 series aluminium.
It is a 2 part filler, mix 50 / 50% till the color was consistant, prep the area and coat the worn areas, cure and rework,,, couple of tricks worked well,,,, if you would start your rework as it's setting up, it worked very well.
The areas that it worked the best were areas like the landing gear door fallowers, they were hi vibration, and non-structual ,,,Devcon saves a lot of time and money.
If you took the left over Devcon as it was usally mixed with scrap pieces of aluminium, set them on an anvil and pound it with a hammer, the aluminium would brake first every time.