Quote:
Originally Posted by DanEC
I agree that an ungraded bolt (Home Depot all-tread) should be sufficient for this application. But since it was suggested that he go to Mcmaster for some "high tensile strength" rod - I felt there was no need to go overboard on high strength - grade 8 material. Yes, the issues of Grade 8 brittleness are primarily related to continuously stressed applications where work hardening can lead to brittleness versus where a Grade 5 will yield and deform instead. I'll give you that it isn't an issue with a bumper bolt that isn't exposed to cyclic loading.
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Once again, you statement regarding grade 8 vs grade 5 is completely false. Feel free to substantiate.