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Yep everything fatiuges and cracks eventually, the old mans alicraft is 20+y now and only had its first cracks appear last year.He puts around 80 to 100 hours on the motor every year! With anything...

Some would say the same of s/s 304/316 being the most common ones out there are soft and suffer work hardening and cracking.
Not sure if this is an issue in suppressors or not but wouldnt mind...