Welder Red Seal · Question
In the SMAW electrode classification E7018-1 H4R, what does the suffix '-1' designate?
The optional '-1' suffix in an electrode classification, per AWS A5.1, indicates that the electrode meets more stringent impact toughness requirements at low te
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Question: In the SMAW electrode classification E7018-1 H4R, what does the suffix '-1' designate?
Answer options: ✅ The electrode provides improved toughness over a standard E7018
- The electrode can only be used in the flat and horizontal positions
- The required polarity is DCEP only
- The electrode has a cellulosic flux coating
Correct answer: The electrode provides improved toughness over a standard E7018
Explanation: The optional '-1' suffix in an electrode classification, per AWS A5.1, indicates that the electrode meets more stringent impact toughness requirements at low temperatures (-46 °C) than a standard electrode without the suffix.
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