Maximum allowable stress for A105 II

Question

Maximum allowable stress for A105 II

jviloria (Mechanical)

(OP)

7 Dec 02 22:49

We are having troubles in Venezuela where I work, and I can´t find some data. I need the maximum allowable stress (S, the value in thickness calculation in ASME section VIII, div. I) for A105 Grade 2. I know is a plate but th vessel has been made laminated.

abbver98 (Mechanical) · Answer 1 · 2002-12-11 07:09:07

A-105 is a forged material !
A-105 2 doesn't exist.
Allowable stress is 20.0 ksi at 200°F.

JohnBreen (Mechanical) · Answer 2 · 2002-12-11 08:30:39

Hello,

Well, of course ASTM A-105 is a common forging material and the allowable stresses are given in the Codes.

ASTM A-105, Gr. 2 is used in forged socket weld fittings, some forged valve bodies, in-line traps and filters, etc. I suspect that a focused search of the internet will yield the information that you require.

Regards, John.

wizster (Mechanical) · Answer 3 · 2004-08-26 18:59:46

First off, sorry, this is probably far too late to respond, but I just came across this today while browsing the forum.

ASTM A105 - Grade II is a forging, but this grade does not appear in current standards - it is simply listed as ASTM A105 in current standards. The Grade II designation was dropped sometime after 1972. I can't tell you the exact year, since I do not have access to all of the old ASTM standards. You should use allowable stresses in the Code year applicable to the design.

metengr (Materials) · Answer 4 · 2004-08-26 21:32:34

Wizster is correct. Prior to the 2001 Edition of the ASME B&PV Code, the allowable stress value for SA 105 material up to 650 deg F was 17.5 Ksi.

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Maximum allowable stress for A105 II