by It's not so much a question of the strength of the metal - that's about the same - but stainless steel happens to have some other features which make it seem a bit tougher and more resilient, and it would not be so likely to suffer from pitting due to corrosion, if that is a factor. Whether these different qualities are sufficient to make a difference to the service life of the component would depend upon the failure mode.
http://www.bssa.org.uk/topics.php?article=125
In this case, it's almost impossible to calculate the stresses under failure conditions. If the exhaust hangers have failed completely (unlikely), then the entire weight of the exhaust system is hanging off this bracket with lots of leverage. The distortion of the failed bracket samples suggests that it then starts to deform, and finally break through repeated reverse bending at relatively low stress levels.
What's the weight of a complete exhaust system, roughly - say 15kg, or more than that?
From the photographs, it looks like the measurements at the point of fracture are about 1cm by 3mm thick = 30mm sq. cross section. That's not much - about the same as one M6 bolt. (Which begs the question, why use three 8mm dia bolts to fix it to the block...)
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This is the forum for the 75 and ZT Enthusiasts Group, where we pledge to preserve the legacy of these wonderful cars for the future. In order to do this we aim to work with other clubs and the automotive industry to ensure that the cars we love are able to be kept on the roads, where they can be enjoyed in years to come
Here at the 75 and ZT Enthusiasts Group, you will find an extremely knowledgeable, enthusiastic and proactive team of individuals dedicated to the preservation of the Rover 75 and MG ZT, arguably one of the last, yet best, motor vehicles mass-produced by an independent car manufacturer in the UK
Unique to the 75 and ZT Enthusiasts Group, is our Register project where, with your help and enthusiasm, we hope to create an up-to-date and accurate register of how many of our cars are on the road, in which specification, colour and body style. With your help and this information, we can create substantial buying force which we can present to parts producers and suppliers
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Here at the 75 and ZT Enthusiasts Group, you will find an extremely knowledgeable, enthusiastic and proactive team of individuals dedicated to the preservation of the Rover 75 and MG ZT, arguably one of the last, yet best, motor vehicles mass-produced by an independent car manufacturer in the UK
Unique to the 75 and ZT Enthusiasts Group, is our Register project where, with your help and enthusiasm, we hope to create an up-to-date and accurate register of how many of our cars are on the road, in which specification, colour and body style. With your help and this information, we can create substantial buying force which we can present to parts producers and suppliers
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