Flashcards in Operations of Common Electrodes for SMAW Deck (11)
What are the three lengths of SMAW electrodes and which is the most common?
9in, 36in and the most common is 14in
What are the types of electrodes? And their F designations
Fast-fill (F1) , fast-freeze (F2) , fill- freeze (fast follow)(F3) and low hydrogen (Basic) (F4)
The 8 main ingredients in SMAW electrodes are?
Rutile or titantium dioxide
China clay, silica and mica
Iron oxide (magnetite, hematite)
Sodium silicate more commonly known as "water glass"
What does electromotive force and surface tension do?
Electromotive force pushes the molten metal along regardless of position
Surface tension attracts the globules of filler metal and slag from the electrode as they approach the molten weld pool. Once they are part of the weld pool, surface tension helps keep the metal in place even in overhead position
What does: CSA, AWS, ASME and CWB stand for
Canadian standards association (metric)
American welding society (imperial)
American society of mechanical engineers
Canadian welding bureau
The last digit on an electrode is the chemical composition and the current needed. What are the 8 different chemical compositions and currents?
0 - Cellulose, Sodium DCEP
1 - Cellulose, potassium AC or DCEP
2 - Titania, Sodium AC or DCEN
3- Titania, potassium AC or DCEN
4 - Titania, iron powder AC or DC
5 - Basic, sodium-calcium DCEP
6- Basic, potassium AC or DCEP
7- Basic, high iron powder AC or DCEN
8 - Basic, Iron powder AC or DCEP
Second to last digit stands for?
1 - all positions except vertical down
2- flat and horizontal fillet
3- flat position only (not a CSA or AWS designation)
4- vertical down
All F classifications for rods in F1-F4
F1 is 20,22,24,27,28,26,20-X,27-X
F2 is 12,13,14,19
F3 is 10,11
F4 is 15,16,18,
Most common stainless steel in the industry and the austenitic electrodes
Austenitic steel these are the 300 series.
E308-16 is designed to join 304 and 308 stainless steal base metals. It is all position except vertical down
E309-15 this electrode is used to join low-carbon steel to stainless steal
E316-16 this electrode is designed to join 316 stainless steel
Electrodes used for cast iron are? And the most commonly used one is?
ECI has a cast iron core wire
Est has a steel core wire (weld is not machinable)
ENI is pure nickel or alloyed nickel (Ni-rod) and it's the most commonly used rod