4140 Specs Do Not Define Mechanical Properties !!?
4140 Specs Do Not Define Mechanical Properties !!?
(OP)
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?





RE: 4140 Specs Do Not Define Mechanical Properties !!?
RE: 4140 Specs Do Not Define Mechanical Properties !!?
-Kirby
Kirby Wilkerson
Remember, first define the problem, then solve it.
RE: 4140 Specs Do Not Define Mechanical Properties !!?
I would have to respectfully disagree with you with mentioning ASTM
RE: 4140 Specs Do Not Define Mechanical Properties !!?
I am not sure if "most" ASTM standards have mechanical properties, but there are several that don't, which doesn't make a lot of sense to me. Examples include:
ASTM A 108
ASTM A 109
ASTM A 322
ASTM A 434
ASTM A 576
ASTM A 659
ASTM A 794
RE: 4140 Specs Do Not Define Mechanical Properties !!?
RE: 4140 Specs Do Not Define Mechanical Properties !!?
RE: 4140 Specs Do Not Define Mechanical Properties !!?
RE: 4140 Specs Do Not Define Mechanical Properties !!?
Request a mill test report from your supplier. This will provide you the necessary information regarding your WPS qualification.
RE: 4140 Specs Do Not Define Mechanical Properties !!?
Can we expect colled rolled 4140 to be more consistent as far as through thickness hardness variation?
RE: 4140 Specs Do Not Define Mechanical Properties !!?
FYI:
Properties of 4140 50mm bar normalized, air cooled:
http
Properties of 4140 50mm bar normalized, air cooled, tempered at 1000F :
http