Consumeables Catalog - Lincoln Electric

APPENDIX
AWS Classification System
Submerged Arc (SAW) Flux & Electrode
Mild & Low Alloy Steel - Per AWS A5.17/A5.17M: 1997 and AWS A5.23/A5.23M: 2007
FXPX-ECMXXK-HZ
FXPX-ECXXX-HZ
376 ı THE LINCOLN ELECTRIC COMPANY
Classification Designators per AWS A5.17 & A5.23
Designates a flux. If followed by the letter “S,” the flux is a crushed slag
or a blend of crushed slag with unused (virgin) flux.
Designates the minimum tensile strength in ksi when multiplied by
10 of the weld metal deposited with the flux and some classification
of electrode.
Designates the condition of heat treatment in which the tests were
conducted: “A” is for as-welding and “P” is for postweld heat treated.
Indicates the temperature in °F at or above which the weld metal meets
the requirement for Charpy V-Notch impact toughness of 27 J (20 ft•lbf).
Two digits are used for test temperatures of -100°F or lower.
The letter “E” at the beginning of each classification stands for electrode.
The letter “C” will follow the “E” if it is a composite electrode.
Indicates whether the electrode is L – low manganese, M – medium
manganese or H – high manganese.
The classification is based upon low dilution weld metal obtained with a
particular flux. The numerical suffix refers to the approximate carbon
content in hundredths of one percent.
Indicates that the electrode is made from a heat of silicon-killed steel.
Optional supplemental diffusible hydrogen designator (H4, H8, H16) in
mL of diffusible hydrogen per 100 grams of weld metal.
Classification Designators per AWS A5.23 Only
Indicates the chemical composition of a solid electrode or the undiluted
weld metal obtained with a composite electrode and particular flux.
Usually a combination of letters, numbers and elements (see next page).
MILD STEEL EXAMPLES
F7A6-EM12K is a complete designation for a flux-electrode combination. It refers to a flux that will produce weld metal which, in the as-welded condition,
will have a tensile strength of 70,000 to 95,000 psi and Charpy V-Notch impact strength of at least 20 ft•lbf at -60°F when produced with an EM12K
electrode under the conditions called for in this specification. The absence of an “S” in the second position indicates that the flux being used is a virgin flux.
F7P4-EC1 is a complete designation for a flux-composite electrode combination when the trade name of the electrode used in the classification is indicated
as well. It refers to a virgin flux that will produce weld metal with that electrode which, in the postweld heat treated condition, will have a tensile strength of
70,000 to 95,000 psi and Charpy V-Notch energy of at least 20 ft•lbf at -40°F under the conditions called for in this specification.
LOW ALLOY STEEL EXAMPLES
F9P0-EB3-B3 is a complete designation for a flux-electrode combination. It refers to a flux that will produce weld metal which, in the postweld heat treated
condition, will have a tensile strength of 90,000 to 110,000 psi and Charpy V-Notch impact strength of at least 20 ft•lbf at 0°F when produced with an EB3
electrode under the conditions called for in this specification. The composition of the weld metal will meet the requirements for a B3 designation.