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AWS A.5.18 ER70S-6 Mig Mag Copper Wire CO2 Welding Wire Cooper Coated Welding wire chemical Composition(%) Trade mark Composition C Mn Si S P Ni Cr Cu ER49-1 ≤0.11 1.80-2.10 0.65-0.95 ≤0.030 ≤0.030 ≤0...