Use of Titanium fastners

vetteman9368 · Post by **vetteman9368** » Wed Mar 05, 2008 5:28 pm

is there any good reason NOT to use Ti fastners in applications where it would be beneficial (ie. rotating weight, unsprung weight)

axegrinder · Post by **axegrinder** » Fri Mar 07, 2008 11:40 am

Strength. I have seen some titanium bolts that were not half as strong as a grade five bolt. I would do some testing on one or two bolts before I spent too much money on a box of 100. And I wouldnt let the sales guy tell me how great they were either.

If somebody is making titanium bolts on a cnc lathe and they are using scraps of the very common 6al4v titanium, the 6al means 6% aluminum.

David Redszus · Post by **David Redszus** » Sun Mar 16, 2008 9:48 pm

axegrinder wrote:Strength.

Axegrinder is quite correct.
Titanium has about half the Modulus of Elasticity than steel and only about two thirds of the tensile. Therefore, to accomplish equal strength, a larger diameter bolt must be used which will negate some of the weight advantage.