What does the “e” in “e-7018” designate?
The “E” in “E-7018” designates the electrode classification according to the American Welding Society (AWS) system. In this system, the “E” stands for “electrode.”
The number following the “E” indicates specific characteristics of the electrode, such as its tensile strength, welding position, and coating composition.
In the case of “E-7018,” it represents a low hydrogen, iron powder electrode used for welding carbon steel in various positions.
E7018 Electrode meaning
The E7018 electrode is a type of welding electrode that is commonly used in shielded metal arc welding (SMAW) or stick welding. Here’s what the E7018 electrode designation signifies:
- “E” stands for Electrode: It indicates that the consumable is an electrode used in arc welding.
- “70” represents the minimum tensile strength of the weld metal: The number 70 in E7018 indicates that the deposited weld metal has a minimum tensile strength of 70,000 pounds per square inch (psi) or approximately 480 megapascals (MPa).
- “1” indicates the welding position: The number 1 signifies that the electrode can be used in all welding positions, including flat, horizontal, vertical, and overhead positions.
- 8 represents the coating type and composition: The number 8 indicates that the electrode has a low hydrogen coating. It is designed to minimize the presence of hydrogen in the weld, which helps prevent weld cracking and ensures good mechanical properties.
Overall, the E7018 electrode is known for its excellent weld quality, high strength, and low hydrogen content. It is commonly used for welding carbon steels in various applications, including structural steel, pressure vessels, pipelines, and heavy machinery.
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