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Additional resources for American Welding Society - User's Guide to Filler Metals
1 A weld pad of the type required in the specification is welded with the electrode-flux combination being tested. Welding parameters are the same as those specified for the weld test plate for the diameter electrode being used. 2 A second weld pad is welded using the same parameters, except that the arc voltage is increased by 8 volts. 3 The top surface of each of the weld pads is ground or machined smooth to clean metal. Weld metal is analyzed only from the top (fourth) layer of the weld pad.
It should be noted that flux of any specific trade designation may have many classifications. Thenumber is limited only by the number of different electrode classifications and the condition of heat treatment (as-welded and postweld heat-treated) with which the flux can meet the classification requirements. The flux marking lists at least one, and may list all, classifications to which the flux conforms. Solid electrodes having the same classification are interchangeable when used with a specific flux; composite electrodes may not be.
These mechanical property designations are followed by the designation of the electrode used in classifying the flux. The suffix included after the first hyphen (EL12, ENi3, ECB3,or ECM1) refers to the electrode classificationwithwhichthefluxwill produce weldmetalthat meets the specified mechanical properties when tested as called for in the specification. The suffix after the second hyphen refers to theweldmetal composition without regard to whether the electrode was solid or composite. |||| || || ||||| | |||| | --- COPYRIGHT 2002; American Welding Society, Inc.
American Welding Society - User's Guide to Filler Metals by American Welding Society