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Re: [MW:16631] Stress relieving & Oxidation on titanium PQR

By Materials & Welding
Dear hegde.,
we have to do PWHT as per customer specification(ghost) £ oxidation as per HT cycles mentioned in my previous mail
                                                                      
R/s
Prasu
Sent from Samsung Mobile



Prakash Hegde <pb.hegde@yahoo.com> wrote:


Hi!
Why did you go for PWHT of Titanium ? if the PQR is on Ti. Generaly Ti does not call for PWHT
Regards
Hegde p.B.

--- On Mon, 28/1/13, Prasu Cutie <pracuty@gmail.com> wrote:

From: Prasu Cutie <pracuty@gmail.com>
Subject: [MW:16609] Stress relieving & Oxidation on titanium PQR
To: materials-welding@googlegroups.com
Date: Monday, 28 January, 2013, 1:16 PM

Dear Experts,

I have Qualified PQR with below deatils

Material: Titanium
Process: GTAW
Heat treatment done twice one is for stress relieving (600deg.C, 1hr soaking, furnace cooling) & other is for Oxidation( 750deg.C, 3hrs soaking, furnace cooling) on same PQR test cupon as per ASME sec.IX

Now my question is, can i write two WPS with separate HT's by having back up of above PQR

as one is with stress relieving & other is with Oxidation.

Request to send me the reply at the earliest with some back up like referance documents if any


Regards
Prasu

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