[MW:13527] RE: 13526] Preheat & Interpass temperature - Reg

Typically preheat recommendations will come from the construction Code
(for example Section I - PW38, Section VIII - Appendix R, or UCS-56
notes). High restraint, or other factors, may result in using a higher
preheat than recommended/specified in the code. General rule of thumb
for interpass; 600F max. for carbon and alloy steels {Q&T or specialty
steels - consult material supplier}, 350F max for stainless, and 300F
max for duplex stainless and nickel based.

John A. Henning
Welding & Materials

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Ramesh
Deenathayalan
Sent: Friday, January 20, 2012 1:40 AM
To: materials-welding@googlegroups.com
Subject: [MW:13526] Preheat & Interpass temperature - Reg

Dear friends,

While writing the WPS based on ASME SEC IX, how can we determine the
minimum preheat temperature and maximum interpass temperature?? Kindly
advice.

Ramesh D

Sent from my Nokia phone

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