Originally Posted by
MikeX
After 40 years experience as a metallurgical engineer…... There is also a tensile stress threshold below which hydrogen embrittlement is unlikely in steel… which is why ….. lots of SAE grade 8 bolt hydrogen embrittlement issues…
…Auchencrow ….is misinterpreting the evidence….But hydrogen embrittlement fractures being typically brittle does not equal brittle failures being typically hydrogen embrittlement…...
Thanks MikeX -- It is good to hear from someone who IS trained in metallurgy. I’ve learned a few things – Like why the HE failures I’ve seen occurred mostly on plated Gr8 fasteners under constant load, and why these brittle failures are different.