Summary for hydrogen embrittlement test failure Discussion
Hydrogen embrittlement test failure is the issue here: Warren John Bates asks why cadmium-plated ASTM F519 1a.1 Grade A and Grade B specimens failed after controlled batch testing. He says impact damage, corrosion, ineffective heat treatment, material quality, and specimen modification were largely ruled out, with NDT before and after processing and no visible corrosion on failed parts. The same material batch produced both pass and fail results, so the material question remains inconclusive. The excerpt does not include any replies or a confirmed root cause, so the page mainly documents the troubleshooting steps already taken and the uncertainty that remains. Based on the information shown, the failure is still unresolved and would need further investigation into process variables not yet excluded.
Q. Cause of hydrogen Embrittlement Test Failure?
Cadmium Plate:
ASTM F519 1a.1 Grade A.
ASTM F519 1a.1 Grade B
We have carried out a controlled batch testing in all process tanks and can exclude the following:
1) Impact damage of test specimens — All test specimens were NDTs to assess for surface cracking both before and after processing
2) Corrosion of test specimens — We have examined the test specimens which failed under magnification and there was no corrosion evident
3) Ineffective Heat Treatment — Assessment of records along with monitoring of controlled batch showed evidence that best practise or correct process was followed & in place.
4) Material quality of test specimens — The same batch of material was used for both pass and fail results. This however is inconclusive.
5) Modification to test specimen — Standard practise across both pass and failed test results show this is not part of the root cause.
Warren John Bates
– South Molton
November 20, 2023