Date: 17 Jan 99 02:37:27 From: Greg Locock <email@example.com> Organization: limited References: 1 2 3 4
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S.L. wrote: > James Matthew Weber wrote: > > Titanium is a very difficult metal to machine, hence it tends to be > > utilized in places where extreme performance is required, and justifies > > the very high fabrication costs. > > That is actually a sort of "urban legend" left over from the 60s. > Titanium requires *different* procedures to machine and particularly to > weld, however it is not significantly more expensive to work with given > a machine shop that has experience with both steel and titanium. In > fact, titanium can be significantly cheaper than steel in some > applications and when you factor in all the costs associated with making > and using the part. I agree - in applications I have used it in Titanium components typically cost around 20% more than the equivalent part in stainless steel. This is a roundabout way of saying that for my parts the machining cost was the largest part of the piece cost. As to the difficulty of machining - a modern machining centre handles TiAl6V4 with ease - the short chip lengths make it easier than steel. If you can machine Unbrako bolts then you can machine Ti. The biggest problem for small projects is getting the bar-stock in a reasonable size. -- Cheers Greg Locock Interested in efficient electric wheel-motors? Have a butchers at http://www.tip.csiro.au/Machines/papers/iwscem/ It's the best in the world! I know, cos I designed the easy bits.