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#1520 03/01/21 08:24 PM
Joined: Apr 2011
Posts: 49
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I'm asking this question on behalf of a recent MRO / FAA repair facility that called me.

They're setting up a small peening machine with glass bead as the media. They've contacted a few distributors and was told that finding glass bead that meets AMS-2431/6 is difficult and other MRO facilities in the region use MIL-PRF-9954D glass bead as an acceptable substitute.

Does anyone have any knowledge/thoughts on this?


Dave Barkley
EI SPT Director, Peening Preceptor & Product Engineer
Joined: May 1999
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I would say that these specifications are NOT interchangeable without agreement from the cognizant engineering organization.

Here are just a few differences:

1. The size designation are different
2. Silicon content no less than 62% in the MIL and not less than 67% in AMS.
3. The sample size is approximately 60 drams in the AMS and varies with size in the MIL spec from 100 grams to 25.


I would suggest this MRO / FAA repair facility contact a manufacturer of glass beads such as Potters https://www.pottersindustries.com/micro-glass-beads/
I'm sure they can tell them who their local distributor is.


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