I expect that the value you mentioned 62 KSI is the tensile strength, which you have found during your PQR qalification. As you have welded with SA 516 Gr. 60 with Gr. 70 material,if during tensile testing, the tensile specimen start necking on the base material ( SA 516 Gr.60 ) side, not on the weld metal, then you can use a WPS supporting this PQR for the welding of SA516 Gr.70 to SA516Gr.70, unless other parameters used on the PQR are same.
It is ofcourse that you are using , one base material having min TS 60Ksi, another one min 70 Ksi and also the used welding consumable TS min 70Ksi, hence during the tensile testing , the sample will form neck from the weaker region.
Regards,
On Wed, Feb 25, 2009 at 7:14 PM, Muhammed Ibrahim <ibratech@gmail.com> wrote:
Hi friends,I need clarification on one important thing regarding PQR.PQR is qualified with SA516Gr.60 ( P1 Gr.1) to SA516Gr.70( P1 Gr.2) wth E7018-1 Electrode and it passes at 62 KSI strength.Can it be used for SA516Gr.70 to SA516Gr.70 production weld based on the above results?.As the production material require 70 KSI strength, how this procedure will support for SA516Gr.70 to SA516Gr.70welding
Thanks & Regards
Muhammed Ibrahim PK
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Sukamal Naskar
Malaysia
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