I have to prepare a new weld procedure based on AMS 4140 normalized material. The specifications I have been given is either AMS-S-5626, AMS 6382 or AMS 6349. None of the specifcations tell me what the expected UTS or hardness is for materials produced to these specifications. Will need to know elongation as well. The subsidiary reference specs listed therein don't give me any clues either. Certainly there are handbooks and web sites that will give ranges of hardness for this alloy, but these seperate sources of information are not binding when i cite the above AMS specs in my purchase order. What is the secret document that I am missing?
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