Which statement about the E7018 designation is correct?

Which statement about the E7018 designation is correct?

• A. The last two digits indicate the welding position and the coating and current
• B. The first digit indicates arc stability
• C. The letters indicate electrode diameter
• D. The numbers indicate packaging color

Answer: (A)

The designation encodes how the electrode is intended to be used. After the leading E, the first two digits show the minimum weld metal strength (70 ksi for this electrode). The last two digits tell you how the electrode is used: the third digit indicates the welding position capability, and the fourth digit indicates the coating type and current. For this electrode, the last two digits are 1 and 8. The 1 means the electrode can be used in all welding positions, and the 8 indicates a specific coating/current class (low-hydrogen, iron-powder type). So, the statement about the last two digits corresponding to position and coating/current is correct. Diameter, packaging color, or arc-stability details aren’t encoded in these last digits.

The designation encodes how the electrode is intended to be used. After the leading E, the first two digits show the minimum weld metal strength (70 ksi for this electrode). The last two digits tell you how the electrode is used: the third digit indicates the welding position capability, and the fourth digit indicates the coating type and current. For this electrode, the last two digits are 1 and 8. The 1 means the electrode can be used in all welding positions, and the 8 indicates a specific coating/current class (low-hydrogen, iron-powder type). So, the statement about the last two digits corresponding to position and coating/current is correct. Diameter, packaging color, or arc-stability details aren’t encoded in these last digits.