Electrode Selection (SMAW) – Copper-Nickel & Nickel Alloys by Technological | Sep 23, 2020 | API RP 582, Welding Notes: According to API RP 582 (2016) – Annex A (*) An unlikely or unsuitable combination. Consult the owner’s engineer if this combination is needed. Related posts: Electrode Selection (SMAW) – Carbon Steel & Low-Alloys Electrode Selection (SMAW) – Stainless Steel Electrode Selection (SMAW) – Duplex Stainless Steel Stress Tables (under Tension) ASME B31.1