Posted by Janicholson on January 14, 2019 at 12:24:11 from (199.17.6.90):
In Reply to: What is it for? posted by Dave H (MI) on January 14, 2019 at 12:10:30:
If it is hard enough to fend off a screw driver assault, it may be Beryllium Copper alloy. The reason for this supposition is that Beryllium Copper is used for non sparking tools. Beryllium is a very toxic material in dust or vapor form it has no acceptable exposure level. Don't grind or polish it. There are other copper alloy materials than can be hardened, but not nearly as hard as Be/Co, which can be above Rockwell C60. Jim
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Today's Featured Article - Gatherin of the Orange - by Rick Nikolich. In July of 1998 I was talking to fellow Allis Chalmers collector Mike Schilling about the annual "Gathering of The Orange" AC show coming up in August of 1999. He got this wild idea that we should get a convoy of AC tractors and drive them from Charlotte, Michigan 105 miles to LaGrange, Indiana.
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