Which of the following is true about E7018-R compared to non-R designations?

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Study for the CSA Welding Inspector Certification Test (W178.2) Level 1. Use flashcards and multiple choice questions with hints and explanations. Prepare for your certification!

Multiple Choice

Which of the following is true about E7018-R compared to non-R designations?

Explanation:
Moisture control matters for low-hydrogen electrodes because moisture in the coating can release hydrogen into the weld and cause cracking. The -R suffix on E7018 signals that this electrode designation has met absorbed moisture testing requirements, meaning its moisture content is within the specified limits before use. This shows the electrode is compliant with moisture controls, rather than implying anything about machine compatibility or polarity. It also isn’t a statement about polarity or a blanket guarantee of compatibility with all welding machines.

Moisture control matters for low-hydrogen electrodes because moisture in the coating can release hydrogen into the weld and cause cracking. The -R suffix on E7018 signals that this electrode designation has met absorbed moisture testing requirements, meaning its moisture content is within the specified limits before use. This shows the electrode is compliant with moisture controls, rather than implying anything about machine compatibility or polarity. It also isn’t a statement about polarity or a blanket guarantee of compatibility with all welding machines.

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