Electrodes
How is the shielding established in SMAW?
By the protective gas from the electrode coating.
Considering the electrode classification E308-16, what is the significance of the number 308
It represents the specific alloy of a stainless steel electrode
What is one big advantage of welding on alternating current (AC)
What is one advantage of welding on alternating current (AC)
How can angular distortion be prevented when welding a T-joint?
By placing welds on both sides of the joint. Also both ends if allowed
What causes distortion in a welded assembly
Residual stress from welding.
What are the characteristics of a E4310 (E6010) electrode (think coating (2) and use)
DAILY TRIPLE
Cellulose, Sodium all position.
Which treatment is significant in welding stainless steel to increase the corrosion resistance of
the welded assembly
Chemical post fabrication treatment or Pickling
What type of welding power source generates only alternating current (AC)
Transformer
Which condition causes melting away of the base material along the edge of the joint
Undercut.
Work hardening is a term that refers to what type of condition
An increase in hardness due to a continuous impacting of the surface
what is the function of the third digit
of the electrode classification system
Position for operation
How does hot-popping of slag affect the process of welding stainless steel
Slag is expelled from the weld violently as the bead cools causing an injurious
condition
What must be done to change from welding on direct current electrode positive (DCEP) to
welding on direct current electrode negative (DCEN)?
By using a polarity switch or by reconnecting the cables.
What type of surfacing weld is performed to create a corrosion or heat resistant layer on base
metal?
Cladding
What is the approximate work angle when shielded metal arc welding in the 2F position
Approximately 45°.
Which material, when incorporated into the flux coating of an electrode, will increase weld
metal penetration into the base material?
Cellulose.
How are stainless steel materials to be stored in the welding shop
Stainless steel must be stored in separate areas from carbon steel, grinding and processing
debris.
What happens to the relationship between current and voltage if arc length is increased
Current is reduced while arc voltage is increased
When assembling two plates in a lap joint, what is the minimum amount of overlapping needed
according to CSA W59-18?
On what base metal thickness are root and face bend tests typically performed
10mm or 3/8"
How can the flux coating on a welding electrode alter the chemical composition of the weld?
With the addition of iron and alloy powders in the flux coating.
What is the most serious hazard regarding fume generation when welding stainless steel
DAILY DOUBLE
Hexavalent chromium
What must be done to alternating current (AC) to change it to direct current (DC)
Use diodes to rectify AC output from a transformer
What is the reason that excessive convexity is considered a serious weld fault
Excessive convexity produces sharp corners at the weld toes.
What type of treatment should be applied to the edges of bend test samples to avoid stress
risers?
The edges should be ground to a 3 mm radius.