Posted by Gordon England on June 23, 2003 at 19:19:52:
In Reply to: Re: rockwell y hardness testing posted by Gordon England on June 23, 2003 at 14:10:29:
The HR 15Y value is read directly from the same dial reading as for the T scale. No correction is necessary, just a change in indenter.
: The Rockwell superficial HR 15T scale uses a 1/16" diameter ball indenter compared to the 1/2" diameter ball indenter of the HR 15Y scale. The scales are very far apart, HR 15T for hard materials like steel and HR 15Y for very soft plastics and abradable coatings. I would advise you to invest in a 1/2" diameter steel ball indenter for your hardness tester.
: Regards Gordon
:
: : we have to test the hardness of nickle graphite abradable coating in 15Y scale, which we are unable llocate the same, we have a superficial hardness tester which has up to T Scale, can we measure the same in that and convert it in RY?
: : if yes can anybody send us the conversion table forthe same (i.e. RT to RY)
: : Thanks and regards.
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