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What is the meaning of welding electrode code E7018?

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Quick Answer

Welding electrode E7018 is a term that describes the electrode's tensile strength, welding position, flux coating and current. E7018 electrodes are used in manual metal arc or MMA welding.

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Full Answer

In MMA welding, an arc is struck between the electrode and the object in question. The electrode and metal object melt and form a solid on cooling. As it melts, the central electrode acts as the filler material to create the new, seamless solid mass. As such, it is a consumable material.

The number code of the electrode is known as its AWS, or American Welding Society, name. The digits all have a specific meaning.

  • E designates the electrode for MMA welding
  • 70 is the tensile strength in ksi, or force per square inch; In this case, 70,000 pounds or force per square inch or 480M/nn2
  • 1 indicates all welding positions while 2 indicates horizontal and flat only
  • 8 indicates the type of flux coating; in this case, iron powder low hydrogen AC or DC+

Use of the correct electrode of the right size and at the correct angle is essential to producing a successful weld. MMA welding is one of the most widely used welding techniques and is often the preferred method for carbon steels.

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