GTAW Flashcards
The word ‘TUNGSTEN’ refers to what?
The pure element
Tungsten’s melting point is…
6170 degrees Fahrenheit
All GTAW electrodes start with the letters…
EW
The ‘E’ stands for…
Electrode
The ‘W’ stands for…
include the German name as well
Tungsten
From Wolfram, which is German for tungsten
Electrodes are further identified by the element with which they are alloyed. Identify the following by what they stand for…
Th... La... Ce... Zr... P...
Th…Thoriated
La…Lanthanated
Ce…Ceriated
Zr…Zirconiated
P…pure
EWla-1.5%
In the electrode classification above what does the 1.5% stand for?
Indicated the percentage of element that is in the electrode…
1.5% lanthanated
The key material GTAW electrodes are comprised of…
Tungsten
GTAW electrodes with a red color code indicate:
A. Pure tungsten
B. 1.7% - 2.2% Thoriated
C. 1.3% Lanthanated
D. 1.8% -2.2% ceriated
B. 1.7% - 2.2% Thoriated
GTAW electrodes come in diameters of:
1/8”
0.040”
5/32”
All of the above
All of the above
What type of electrode is EWP?
Color code?
Current?
Perfect for welding on what kind of material?
Pure
Green
AC
Aluminum
What electrode type is EWCe-2?
Color code?
Current?
2% Ceriated
Orange
DCEN, AC
What electrode type is EWLa-1?
Color code?
Current?
1% Lanthanated
Black
DCEN, AC
What electrode type is EWLa-1.5%?
Color code?
Current?
1.5% Lanthanated
Gold
DCEN, AC
What electrode type is EWLa-2%?
Color code?
Current?
2% Lanthanated
Blue
DCEN, AC
What electrode type is EWZr-1?
Color code?
Current?
1% Zirconiated
Brown
AC
What electrode type is EWTh-1?
Color code?
Current?
1% Thoriated
Yellow
DCEN, Inverter AC
What electrode type is EWTh-2?
Color code?
Current?
2% Thoriated
Red
DCEN, Inverter AC
What electrode type is EWG?
Color code?
Current?
General
Gray
Manufacturer Specified
GTAW electrodes with a green color code indicate:
Pure tungsten
EWP electrodes contain a minimum of _____ tungsten, with no additional __________ ___________.
99.5%
Alloying elements
EWP (pure tungsten) provides good _____ __________ when used with _________ current.
Arc stability
AC current either balanced-wave or continuous high frequency
The tip of the EWP electrode maintains…
A clean, balled end that promotes good arc stability
EWP electrodes are usually used with AC but may also be used with ______ but doesn’t provide the arc initiation and arc stability characteristics
DC