Hardness testing is is it a NDT Test ?
Hardness testing is is it a NDT Test ?
(OP)
May be a basic question but an internal auditor ask us a question: Hardness testing Is it a NDT Test?
I really don't have the good answer
For rough forgings parts I guess it's NDT TEST, for machined parts I guess NO
Any help?
Thanks
I really don't have the good answer
For rough forgings parts I guess it's NDT TEST, for machined parts I guess NO
Any help?
Thanks





RE: Hardness testing is is it a NDT Test ?
If, e.g., you want to measure the depth of case hardening, you have to slice through the part and run a line of hardness tests; definitely DT.
Mike Halloran
Pembroke Pines, FL, USA
RE: Hardness testing is is it a NDT Test ?
For instance, an equotip or microdur test on a 516-70 pressure vessel will not cause future usability problems.
A telebrineller test on a thin cast iron motor housing would not...
RE: Hardness testing is is it a NDT Test ?
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"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year
RE: Hardness testing is is it a NDT Test ?
RE: Hardness testing is is it a NDT Test ?
But can a finished part receive a hardness test without affecting its application? Yes or no, depending on size, testing method, where to test, etc.
RE: Hardness testing is is it a NDT Test ?
rp
RE: Hardness testing is is it a NDT Test ?
JR97
RE: Hardness testing is is it a NDT Test ?
As Metenger said, it is not defined as destructive because it can be done non-destructively (with limitations depending on the tools available and the object to be tested).
That being said, if you need to check the hardness of a part going all the way from the surface to the core (walk-in hardness), you will likely have to cut the part perpendicular to the direction you want to test hardness in.
The basic rule is that if the componenet can be put into service after the test without a detriment to its properties or service life, then it is a non-destructive test.
"Metal Health'll cure your crazy
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RE: Hardness testing is is it a NDT Test ?
"Metal Health'll cure your crazy
Metal Health'll cure your mad
Metal Health is what we all need
It's what you have to have"
-Quiet Riot
Bang Your Head (Metal Health)
RE: Hardness testing is is it a NDT Test ?
Both seem releveant, and I'm particularly curious about the stamping.
RE: Hardness testing is is it a NDT Test ?
There are many types of tests performed on materials that do not cause damage. Most dimensional measurements, for example, do not cause any damage, but nobody considers these tests as being NDT. Same for weight, not to mention counting quantity.
Whether or not stamping for traceability is considered "destructive" or not is dependent on the nature of the stamping and the application and really has nothing to do with NDT.
rp
RE: Hardness testing is is it a NDT Test ?
Aaron Tanzer
www.lehightesting.com
RE: Hardness testing is is it a NDT Test ?
The most common NDT methods (for those who aren't familiar) are visual, magnetic particle, liquid penetrant, radiographic, and ultrasonic.
More information at:
www.ndt-ed.org
RE: Hardness testing is is it a NDT Test ?
Depending on where the stamping is placed; absolutely, stamping can be destructive.
I've done failure investigations on gears where a gear face is stamped near the root of a tooth creating a stress raiser in an already highly stressed area.
You can guess where the origin of the crack, which caused a tooth bending failure, was.
Ron Volmershausen
Brunkerville Engineering
Newcastle Australia
http://www.aussieweb.com.au/email.aspx?id=1194181