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[MW:1637] Re: Minimum impact energy value of PQR

By Materials & Welding
Dear friend,
Yes, you can use this PQR. For the procedure where the impact is the requirement , the impact test temperature is essential, you can't use the PQR which has been tested warmer than the MDMT of your job ( example: if your PQR is tested @ -40 deg C, and if your MDMT is -41 deg C , you can't use this PQR, but if your MDMT is -39 deg C, or -40 deg C, you can use this PQR), To qualify a procedure we use a standard Sample of 10 X 10 X 55 mm or subsize samples, and according to the base material thickness we comply the min impact value. and if your base material thickness is 40 mm, then it will qualify from 16mm to 200 mm , unless it successfully pass all the required mechanical tests with impact testing.

Regards

On Wed, Feb 25, 2009 at 7:23 PM, Muhammed Ibrahim <ibratech@gmail.com> wrote:
Hi friends,
 
ASME sec VIII Div.1 shows the average impact energy value for CS ( SA516 Gr.70) in Fig. UG84.1M is 20J average up to Thk. 60 mm, 60mm to 75 mm it varies from 20J- 24J, 75 mm onwards it shows 24 J. If the PQR  is qualified in 40mm thk at 20J, the PQR will support to 16mm to 200mm as per ASME sec. IX. If my production thickness is 90 mm can I support this PQR for this procedure as the production calls for 24J average as per SEc. VIII and PQR shows 20 J?

Thanks & Regards
Muhammed Ibrahim PK





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Sukamal Naskar
Malaysia

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