Dear Mr. Padmanabhan,
As per Asme Sec-IX, If we are going for 12mm Thickness material then the lower limit will start from 5mm since the thickness limit of Impact Test is not applicable for PQR undergoing Normalizing.
See para. QW.403.6
Thanking you,
Best regards,
Shadab Alam Ansari
Welding Engineer
For Gulf Heavy Industries Co
One of Al-Bassam Group of Companies
Cell Phone No: 00966502090165, Fax No:0096633410105
Telephone No: 0096633400098 (5 Lines) Ext: 232
Email: ansari@ghi.com.sa
Web: "www.ghi.com.sa"
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From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of G Padmanabhan
Sent: Thursday, November 11, 2010 1:42 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:8208] how to select a PQR test coupon
Dear Ajay Singh,
Please find my reply given below
1.Select the test coupon thickness of 11.8 mm to 12mm Thickness.Since you are carrying out heat treament above upper transformation temperature the max base metal thickness limit is 1.1 x T.
2. Also due to impact test,it covers lower T/2 limit also.i.e 6mm
I hope that you understand above explanation.
On Thu, Nov 11, 2010 at 8:45 AM, ajay singh <asingh10088@gmail.com> wrote:
Dear members
Can you please guide me to select PQR test coupon on the basis of my below requirement
1. PQR to be used for my job thickness 6.0 mm to 13 mm
2. Material of construction is SA516 GR.70 plate.
3. Welding process to be involved is only SMAW.
4. Test coupon to be Normalized at 900 deg.C after completion of welding.
5. Bend test, Tensile, Hardness & Impact test to be carried out as per Sec. IX.
6. All joints to be single V type and to be back chip for final run.
kindly guide me with some example.
thanks in advance.
Ajay
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With Warm regards,
G.Padmanabhan
+96895685853
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