Questions and Answers
What forms the weld bead in SMAW?
electrode wire core mixing with molten base metal
Which American Welding Society (AWS) specification(s) cover the most common electrodes for welding carbon (mild) steel and low-alloy, high strength steels?
What is the rated tensile strength of the deposited weld metal from an E7018 electrode?
70,000 psi
What item must all SMAW electrodes used for code-governed work have printed on them?
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Electrodes with powdered iron in their flux belong to which group?
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A SMAW electrode number that ends with an R means that it is moisture-resistant.
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What is an example of a deep-penetrating SMAW electrode?
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Welding in vertical and overhead positions can be done with SMAW electrodes larger than 3/16" in diameter if they are not classified as low-hydrogen.
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At what minimum temperature setting should low-hydrogen SMAW electrodes be stored after opening?
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What should be done with low-hydrogen electrodes that have been exposed to liquid water?
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Study Notes
SMAW Electrodes Overview
- The weld bead in Shielded Metal Arc Welding (SMAW) is created by the melting of the electrode wire core combined with the molten base metal.
AWS Specifications
- The American Welding Society specifications A5.1 and A5.5 define the most common electrodes for welding carbon (mild) steel and low-alloy, high-strength steels.
Tensile Strength
- The tensile strength of the deposited weld metal from an E7018 electrode is rated at 70,000 psi.
Identification and Packaging
- All SMAW electrodes intended for code-governed work must display the AWS classification number on the electrodes and the shipping container.
Fast-Fill Electrode Group
- Electrodes categorized under the fast-fill (F1) group contain powdered iron in their flux.
Moisture Resistance
- A low-hydrogen SMAW electrode number that ends with an "R" indicates the electrode is moisture-resistant.
Deep-Penetrating Electrodes
- E6010 is an example of a deep-penetrating SMAW electrode suitable for use on poorly prepared surfaces or butt joints.
Vertical and Overhead Position Welding
- For welding in vertical and overhead positions, SMAW electrodes larger than 3/16” in diameter should not be used unless they are classified as low-hydrogen (F4) electrodes.
Storage of Electrodes
- After opening a sealed container of low-hydrogen SMAW electrodes, they must be stored in an oven at a minimum temperature of 250 degrees F to maintain quality.
Disposal Protocol
- Low-hydrogen electrodes that have come in contact with liquid water should be properly disposed of to ensure safety and maintain structural integrity in welding applications.
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Test your knowledge of SMAW (Shielded Metal Arc Welding) electrodes with these flashcards. Each card covers key terms and specifications related to welding, including AWS standards and electrode properties. Perfect for welding students and professionals alike.
