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Rave About Your Rack Please do not post retail SPAM.

Topic Date User
Bolt Plates 21-May-2007 At 12:52:16 PM AlanD
On 21/05/2007 gfdonc wrote:
>On 21/05/2007 anthonyk wrote:
>>hang on, if the bolt is made from stainless steel and the bolt plate
>>made with titanium, would it cut into the bolt?
>Not sure why you would even think that.
>Some better-informed metallurgist is invited to respond, but from a loading
>point of view, why would you think 10kN would be enough to slice into metal?
>Bear in mind Ti is roughly the same strength as steel per volume, so the
>brackets would either be lighter or stronger, but not thinner. As Joe
>indicated, the idea might be to make nice thick Ti brackets that looked
>(and were) much beefier than steel, but without a weight penalty.
Metallurgist here ;)

The relative hardness is the real issue, titanium Ti.6Al.4V ( a common Ti Alloy) is about twice as hard as say 316 stainless or 3 times 304 stainless. In a wear situation, hardness is an extremely important factor. While the loads involved are probably insufficient to chop the bolt off in a single event, the continuous motion of the bolt plate relative to the bolt is going to cause the wear of the bolt, thus reducing the life expectancy of the bolt.

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