>>983612>/r/ pics of all the steel frames you've cracked.Like previous anon, I've had a steel frame break at the dropouts - it was actually kinda scary, was truly 'just riding along' on a busy road and my wheel started rubbing.
And not really fatigue related, but I cracked the seattube on a steel frame with relatively little force, was trying to spread the ears of the seatlug in the process of trying to extract a stuck seatpost.