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  • Users: kukes2
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  1. kukes2

    PQR Qualification

    Our company is going to qualify a welding procedure on a 1/4"thick plate coupon of SA-387 P91 material welded with the GTAW process using ER-NiCr-3 filler rod in the 1G position with no PWHT.We will use a 99.90% argon mixture for shielding and backing.Preheat will be 200 degrees F and interpass...

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