Basic Info
What does SMAW mean?
Shielded Metal Arc Welding
What does the 70 mean in ER7018
Tensile Strength, 70,000 lbs per sq inch
What are the two main types of electrodes that we use?
6010, 7018
What is SMAW mainly used for?
Repairs on dirty materials, construction
What is slag?
Remainder of the flux that floats to the surface of the weld as its cooling and forms a hard crust.
Why is shielding gas not required for SMAW?
The flux covering on the rod, provides shield from oxidation
What does the 1 mean in 7018?
Weld position-all positions
What type of Electrode flux produces the heaviest slag and the rods need to be kept in an oven? (_____ -based Flux)
Mineral-Based Flux
What is Flux?
The coating on the outside of the electrode that becomes slag and prevents oxidation.
What is the electrode holder called?
Stinger
What current source is used for SMAW and what does it mean?
DC- direct current
What are 6010 classified as or known for?
Being deep penetrating rods
What type of electrode flux has thin slag, and a strong root fusion?
Cellulose-based Flux
What are the welding positions in order? (_G, _G....)
What direction does DC flow in?
One direction, from welder to electrode to workpiece back to the welder.
What does amperage control?
Heat Input, overall amount of penetration
What does the 8 mean in 7018?
Type of Current and coating
What type of electrode flux have a softer arc and have the heaviest slag covering?
Rutile-based Flux
What is the average amperage used for 3/32 7018 rods in 3G position?
80-95
What is arc length?
The distance the arc jumps from electrode to the metal.
List the rod sizes in order from smallest to Largest?
3/32, 1/8, 5/32
List the correct Electrode classification for each group.
Fast Fill, Fast Freeze, Fill freeze
F1, F2, F3, F4
F2 and F4- Fill Freeze
F1- Fast Fill
F3- Fast Freeze
List 4 things that aid in deciding what electrode to use.
Base metal properties, Electrode diameter, Joint fit-up, Welding position, Welding current, Production Efficiency
What is the average amperage used for 5/32 rods in 1G position?
140-165
What 3 main industries require welders?
Construction, Automotive, and Railroad