Does EW indicates the type of filler metal used for the GTAW process?

Yes, the designation "EW" in filler metal specifications indicates the type of filler metal used for Gas Tungsten Arc Welding (GTAW). Specifically, "E" denotes the electrode, while "W" signifies that the filler metal is specifically designed for welding applications. This designation helps welders select the appropriate filler material based on the base metals being joined and the desired properties of the weld.