Heat treat test dimple

turnit

Starting to get Involved
#1
Currently have a customer trying to reject part for having the heat treat test "dimple" evident on the end of a dowel pin. These pins were treated per AMS-H-6875 and tested per AMS 2759/2. I can't find anything that states whether this is allowable or not. Does anyone know of any documentation that supports this if there is any or not?
 
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ScottK

Not out of the crisis
Staff member
Super Moderator
#2
Currently have a customer trying to reject part for having the heat treat test "dimple" evident on the end of a dowel pin. These pins were treated per AMS-H-6875 and tested per AMS 2759/2. I can't find anything that states whether this is allowable or not. Does anyone know of any documentation that supports this if there is any or not?
Rockwell test kind of thing?
I would ask the customer where he expects the test dimple to be, because there has to be one, and then ask him to specify that in any future purchase orders... what to do about the complaint becomes a business decision.
 
#3
Did the indention violate a drawing dimension or drawing call out which prohibited testing in a certain area?
Did customer reject as an unusual visual condition?
Does you customer have machining or visual standards that may help your position?
There is a difference in indention from a large Brinnel, to HRC to a superficial scale indention. Maybe a lighter scale and conversion to keep the inspection area less noticeable for future hardness verification on this part.
 

Ninja

Looking for Reality
Trusted Information Resource
#4
Rockwell test kind of thing?
I would ask the customer where he expects the test dimple to be, because there has to be one, and then ask him to specify that in any future purchase orders... what to do about the complaint becomes a business decision.
Agreed...but I haven't seen anywhere in this thread yet that states 100% inspection. (Maybe it's required, maybe not).

I would advocate having the discussion with the customer as to what they want...and where. Settle it out like people working well together, instead of in the middle of a returns process.

The results of the discussion should handle all the info you need for the returns process by default. Then, as Scott says, the actual part(s) in question become a one-time business decision.

I've seen a dummy plaque in heat treat with the parts, and testing done on the plaque so that the parts aren't affected.

Again, if 100% hardness test is required...that parts will have the dimple. Put it on the mutually agreed drawing in this case.

:2cents:
 
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