Dear experts
-- regarding A/M Subject kindly advice why the PQR Test had been failed two times even this WPS/PQR Approved before and we just tried to copy it
all welders 2 times failed in root bend / tension some times not reach 250 MPA as required (2 root bend + 2 root face + 2 tensile testing are required)
the lab said first time there are porosity
and inclusions but even 2nd test was failed (attached photos for your reference)
and inclusions but even 2nd test was failed (attached photos for your reference)
BASE METAL : AA 5083 H 321
FILLER METAL : ER 5356
Joint Preparation: - Single V CPJ
| Weld Layer | WELDING PROCESS | WELDING POSITION / DIRECTION | ELECTRODE(S) | GAS SHIELD | GAS FLOW RATE lit/min. | AMPS | VOLTS | WELDING SPEED mm./min. | FLUX | WFS M/Min. | Mode of Metal transfer for MAW | ||
| SIZE mm | TRADE NAME | POLARITY | |||||||||||
| 1 | GMAW | 3G | 1.2 | AUTO ROD 5356 | DCEP | ARGON 99.99% | 15-25 | 120-180 | 18-26 | 12-20 | NA | 8.5 | Pulse transfer |
| 2 | GMAW | 3G | 1.2 | AUTO ROD 5356 | DCEP | ARGON 99.99% | 15-25 | 120-180 | 18-26 | 120 - 140 | NA | 8.5 | Pulse transfer |
| Back weld | GMAW | 3G | 1.2 | AUTO ROD 5356 | DCEP | ARGON 99.99% | 15-25 | 120-180 | 18-26 | 100 - 110 | NA | 8.5 | Pulse transfer |
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