[Rinnwald]

...capable of withstanding separation stress of up to 17404.5 pounds per square inch on average...

17.4 ksi is less stress than steel and aluminum alloys can typically take on their own (yes, I know some aluminums are less). So, you make an alloy that is weaker than the individual components.

[Red Badger]

Which is good for ‘Crumple Zone’ materials to absorb shock.....................................