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eLibrary  >  AWS B2.1-4-221:2021 Standard Welding Procedure Specification (SWPS) for Gas Tungsten Arc Welding (Consumable Insert Root) followed by Shielded Metal Arc Welding of Chromium- Molybdenum Steel (M-4/P-4, Group 1 or 2), IN515, ER80S-82, and E8018-82, 1/8 inch
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