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Old 03-12-2005, 04:15 PM
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SteveS SteveS is offline
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Join Date: Nov 2002
Location: Silicon Valley, CA
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My first round of testing started off with bolting the sample bar to a 5' bar. I pivoted off the end and let it rotate to the concrete (with the end extending off the porch.) In 2 strike everything popped off. I think the problem was I had smooth stainless steel.

Well guess what. This time I used an 80 grit finish on the steel. 2 failures without any tapping or heat or anything. 3 days aging and these just popped off:

JB Weld
West Systems.




As you can see in the photo the epoxy held just fine on the dymond wood. Came clean off the steel!? Feel free to assume I did something wrong. The West systems is pre-measured. So that isn't it. The JB Weld is plenty hard and really on the wood. Came clean off the steel. You tell me why?

I know every epoxy I could find spec sheets on show much less adhesion to stainless, than carbon steel. Could this be it? I don't know.

The rest of the block was subjected to drops down a 20" pipe onto a block of wood - mild jaring effect. THen I did 'thumb' pressure and they are all still on there, fine.

I really don't know why those 2 failed.

Tracy, are you testing any hardened stainless?


Steve


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