Charpy Impact Testing small hardware items
Charpy Impact Testing small hardware items
(OP)
I am currently working on a project involving hardware ranging between 1/4" and 5/16" diameter. One of the requirements is that these items must have a minimum energy absorption of 20J @ -20C per ASTM A370 (10 mm X 10 mm sample). From what I can find the smallest sample size specified in ASTM A370 is 5 mm X 5 mm and there is no correction factor for energy absorption. It may be possible to machine the smaller specimen out of the 5/16" material but not the 1/4", what would the solution be to verify that these items meet the customer's requirements?
Thanks in advance,
Lurks
Thanks in advance,
Lurks





RE: Charpy Impact Testing small hardware items
RE: Charpy Impact Testing small hardware items
Thanks,
Lurks
RE: Charpy Impact Testing small hardware items
RE: Charpy Impact Testing small hardware items
It sounds as if the customer is applying a specification to a product (small diameter fasteners) that it was not intended to cover. You probably can meet all the other requirements, but since the specificaiton was not intended to cover this small diameter, it does not say what to do in these circumstances.
rp
RE: Charpy Impact Testing small hardware items
It sounds like they tried to go cookie cutter and forgot to consider the part size.
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Plymouth Tube
RE: Charpy Impact Testing small hardware items
It is unusual to see that requirement on a part with that small of a thread size. I wonder what the application is that will require those properties.
RE: Charpy Impact Testing small hardware items
These products are for a Canadian customer that puts the same Charpy impact requirements on all of the products that they receive from us.
Thanks,
Lurks
RE: Charpy Impact Testing small hardware items
RE: Charpy Impact Testing small hardware items
rp
RE: Charpy Impact Testing small hardware items
Sounds like a clerk with a BA was put in charge of handling technical specifications.