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Re: Stainless steel gurus

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Dave-

Looks like Chris covered all my points (& some more) while I was typing.

The "take away message"

>>>Be real careful what you're going to do with it. You just can't swap it
for carbon steel willy-nilly<<<<

cheers
Bob



On 7/27/05, Christopher Wright <chrisw(--nospam--at)skypoint.com> wrote:
> 
> On Jul 27, 2005, at 11:32 AM, Dave Adams wrote:
> 
> > I have a client who is asking about the availability of
> > "high-strength" stainless steel tubingand if there is a common ASTM
> > standard that is used.
> There are lots of ASTM standards for pipe and tube. The common
> structural tubing is supplied to A-269. The most commonly used grade is
> 304. You can also get pipe supplied to A-312 and seamless tube to
> A-213. You can get structural stainless that's been strain hardened to
> higher yield strengths.
> 
> Be real careful what you're going to do with it. You just can't swap it
> for carbon steel willy-nilly. it doesn't heat treat, and the strain
> hardening disappears forever when the material is welded. The min
> specified yield strength is about 30 ksi, and the stress-strain curve
> isn't linear, which affects buckling. It also discolors when you weld
> it, and weld distortion is more of a problem since the thermal
> expansion is greater than for carbon steel. And it does in fact stain
> and/or corrode under certain conditions.
> Christopher Wright P.E. |"They couldn't hit an elephant at
> chrisw(--nospam--at)skypoint.com   | this distance" (last words of Gen.
> .......................................| John Sedgwick, Spotsylvania
> 1864)
> http://www.skypoint.com/~chrisw/
> 
> 
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