By American Welding Society
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Extra info for American Welding Society - User's Guide to Filler Metals
Certain fluxes, generally considered to beneutral, tend to remove carbon and manganese to a limited extent and to replace these elements with silicon. With suchfluxes, a silicon-killed electrode is often not necessary though it may be used. Other fluxes add no silicon and may therefore require the use of a silicon-killed electrode for proper wetting and freedom from porosity. The flux manufacturer should be consulted for electrode recommendations suitable for a given flux. In welding single-pass fillets, especially on base metal that has scale, it is important that the flux, electrode, or both, provide sufficient deoxidation toavoid unacceptable porosity.
These filler metals deposit weld metal similar to 8018-C3 covered electrodes and are used for weldinglow-alloy high-strength steels requiring good toughness at temperatures as low as -40°F (-40°C). COPYRIGHT 2002; American Welding Society, Inc. 6 ERSOS-Ni2 and ESOC-Ni2 Classifications. These filler metals deposit weld metal similar to 8018-C 1 electrodes. Typically, they are used for welding 3-112 percent nickel steels and other materials requiring a tensile strength of 80ksi (550 MPa) and good toughness at temperatures as low as -75°F (-60°C).
2 Axial spray transfer in argon-oxygen shielding taining substantial amounts of argon or helium generally gas is mainly related to the magnitude and polarity of the result in superior weld metal impact properties. Shielding arc current and electrical-resistance heating of the elecgas mixtures of 50 to 90 percent argon-remainder CO2,or trode. The high droplet rate (approximately 250 droplets 50 to 90 percent helium-remainder CO,, result in higher persecond)developssuddenlyabove a criticalcurrent short-circuiting rates and lower minimum currents and level,commonlyreferredtoasthetransitioncurrent.
American Welding Society - User's Guide to Filler Metals by American Welding Society