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No offense but the statement in bold above is an excellent example of how myths get started. And like a lot of your statements on Grade 8 vs. Grade 5 (& A325) it is a myth. Here's why: ASTM is the American Society of Testing Materials, the premier standards organization for most industrial...

I disagree with some of your points, as discussed below: - Grade 8 bolts are not "too" hard, nor are they prone to failure due to "shock" loads. A g8 is more "brittle" than a g5, but only after it reaches yield. A g5 will bend to yield (i.e. permanent deformation - not good) and break well...