Related to Rodney's request: Getting a grain counting eyepiece is a fairly quick and easy estimation tool. All the accreditation in the world won't help if you don't know the real magnification of the microscope. Yes, the manufacturer's objective has a number stamped onto it, and so does the eyepiece. But it's best to have checked each objective with a magnification standard to verify. If the grain size that you are measuring will be used in an accept/reject decision, you need to have the best knowledge of your system possible.
It's even more important with microscopes with variable magnification, variable focal distance, and digital capture. Of course, a digital capture system will almost always have a built-in grain size measurement routine. If the capture system allows a calibration constant to be applied at specific objective magnifications, make sure that it cannot be changed by casual users of the system.
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Paul Tibbals
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Original Message:
Sent: 07-20-2023 08:32
From: Kevin Haffey
Subject: In need of a Lab Accredited ASTM E112 Grain Counting eyepiece Reticle
Rodney, Try Klarman Rulings, Inc. on the web as www.reticles,com or phone # 800-252-2401. As an ANAB lab assessor and as a Nadcap materials testing lab auditor reticles from Klarman are the ones I see most often in labs.
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Kevin Haffey
Nadcap MTL Auditor
Self Employed,Universal Stainless
Evans City PA
(412) 629-7367
Original Message:
Sent: 07-19-2023 14:13
From: Rodney Recore
Subject: In need of a Lab Accredited ASTM E112 Grain Counting eyepiece Reticle
We are currently reviewing our procedures here and have found that our current grain counting reticle does not have enough required documentation to meet our audit approvals. The documentation must show a lab accreditation stamp to show that it meets or exceeds the standard in question. We have determined other than trying to retrace where and when we purchased I'm hoping someone can steer me to a reputable vendor that cna provide us with a new eyepiece along with this type of documentation.
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Rodney Recore
Plant Process Metallurgist
Brunner International
Gasport NY
(716) 998-9823
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