Re: who can tell me

From: <Christopher>
Date: Mon Jan 31 2005 - 10:20:00 EST

On Jan 31, 2005, at 2:01 AM, chenysh wrote:

> Who can tell me the "sigma phase" in metal material at high temperture?
It's a chromium-rich area that forms in grain boundaries when austenitic stainless cools too slowly through about 800 F. It promotes intergranular corrosion.
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/ Received on Mon Jan 31 10:20:00 2005

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