Re: ASME mechanical properties of AISI 4130

From: <Christopher>
Date: Tue Nov 13 2007 - 14:24:00 EST

On Nov 13, 2007, at 10:52 AM, Afshin wrote:

> Is there anybody knows the ultimate or yield strength or ASME
> allowable
> stresses of ASTM A-519 or AISI 4130 for temperature range from -20F to
> 250F for ASME (secVIII D1 or B31) pressure calculation purposes.

i don't see either of these materials listed in Section II. A-519 is mechanical tubing made from carbon steel and may either be considered unsuitable for pressure purposes or not listed because no one's gone to the trouble of providing data and requesting that it be listed.

AISI 4130 isn't shown either. Remember that any material used as part of a pressure boundary or an attachment must conform to an ASTM standard with minimum mechanical properties specified or else be qualified according to Section VIII for some specific purpose. AISI specs provide chemistry only so you'll need more than just a simple AISI designation. Other 41xx grade alloys (eg 4045, 4130, 4140) are included with bolting and bar specifications.

Christopher Wright P.E. |"They couldn't hit an elephant at <a href="/group/PipingDesign/post?postID=KqxypCwuZqkkxJk00cyLTBQKQ9feLCWAAr1eeEZcKEJLrUfXcm5aTR6lL1-H0l6JFfJUw_NN3JGvy7_fCA">chrisw@skypoint.com</a> | this distance" (last words of Gen.

.......................................| John Sedgwick, Spotsylvania

1864)
<a href="http://www.skypoint.com/~chrisw/">http://www.skypoint.com/~chrisw/</a> Received on Tue Nov 13 14:24:00 2007