> I still would like any heads ups and tables you may have, but I
> have found maybe too much info here:
> Stainless Steel Info Center
Back in the dear dead days when this country still took some pride in
manufacturing and steel production, INCO came out with a large number
of serious information on stainless. I don't know where they've
gotten to. They may be buried at Stainless Steel Info Center or the
Nickel Development Institute. These include ASTM STP 454 ''Structural
Stainless Steel -- Guidelines for Design' and 'A Design Guide to
Structural Stainless Steel' by Gilbert and Griffith. I couldn't find
them at the INCO site (now INCO-Vale) but you can try Google.
I also found this at the ASCE site: ASCE 8-02 Specifications for
Design of Cold-Formed Stainless Steel Structural Members.
The problem with cold formed stainless is that welding makes the
economics a bit tricky. The economy makes the raw material cost
pretty high, so using stiffened thin sections of strain hardened
materialyou can save material if you don't have to weld it or if
elastic buckling isn't an issue. Cold work increases the strength
greatly, but welding puts you back to the annealed state. Tooling
charges for formed sections will also eat you alive.
Stainless pipe is fairly common as are angles in small sizes. Larger
sizes are a bit trickier.
I got involved in one case where some poor soul specified a lifting
structure out of stainless rolled sections on the strength of a
magazine ad by an outfit who claimed they'd sell rolled shapes of all
kinds. Turned out that what they'd neglected to mention was that
they'd supply in mill quantities only with a 9 month delivery, but
not guaranteed. I expect the situation is worse today--trying to find
what you need will lead you on a merry chase around the world, and
you may end up with cast-off material that no one else will buy.
Christopher Wright P.E. |"They couldn't hit an elephant at
chrisw@skypoint.com | this distance" (last words of Gen.
.......................................| John Sedgwick, Spotsylvania
1864)
http://www.skypoint.com/~chrisw/
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