Dear All,
-- There are two PQR's and both are qualified with a coupon of 16 mm thickness. The one is qualified with Submerged Arc Welding (SAW) and other is qualified with Shielded metal arc welding SMAW. When impact testing was done on weld and HAZ of samples taken from both coupons, it showed a lot of difference between impact test values keeping same test conditions. The lowest impact value of sample from SMAW coupon is 143 joules whereas sample from SAW coupon has lowest impact value of 35.1 joules. Is this difference accptable and why?
Waiting from your valuable feedback.
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