ER7018 Electrode or Stick Rods, What is it and why should I be using it?
Introduction:
When it comes to welding, the ER7018 electrode takes center stage for its exceptional performance and versatility. This comprehensive guide will walk you through the basics of ER7018, from understanding its composition to practical welding applications.
What is ER7018 Electrode?
ER7018 is a low-hydrogen, iron powder electrode known for its high-quality welds. Falling under the AWS classification E7018, it's specifically designed for welding various carbon steels.
How to Weld with ER7018 Electrode:
Preparation is Key: Clean the welding surface to remove rust, oil, and debris. Ensure the workpiece is properly positioned, and gaps are appropriately set.
Amperage and Polarity: Use direct current (DC) with a positive electrode (DCEP). Adjust amperage according to the electrode diameter and welding position.
Electrode Positioning: Hold the electrode at a slight angle, around 5 to 15 degrees, in the direction of travel. Maintain a short arc length for optimal control.
Steady Travel Speed: Maintain a steady travel speed to achieve uniform and quality welds. Avoid excessive weaving, especially in vertical and overhead positions.
What are the Common Characteristics of ER7018:
Low Hydrogen Content: ER7018 electrode has low hydrogen levels, minimizing the risk of hydrogen-induced cracking in the welds.
Versatile Applications: Suitable for welding carbon steels in various thicknesses, making it versatile for different projects.
All-position Welding: Exhibits excellent performance in all welding positions, including flat, horizontal, vertical, and overhead.
Clean Weld Appearance: Yields clean and visually appealing welds with minimal spatter and smoke.
Common Questions:
Q: What is ER7018 used for? A: ER7018 is used for welding structural steel, pressure vessels, pipelines, and in shipbuilding due to its versatile and strong welds.
Q: How to weld with ER7018? A: Clean the surface, use DC with positive electrode, maintain a short arc, and employ a steady travel speed for optimal results.
Q: Why is ER7018 popular? A: ER7018 is popular for its low hydrogen content, versatile applications, and ability to deliver clean and visually appealing welds.
Terminology
Still confused? Welders often use informal or colloquial names to refer to welding electrodes based on their characteristics, appearance, or common use. Here are some common names that welders may use for electrodes:
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Rod:
- A generic term used to refer to welding electrodes, regardless of their specific type.
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Stick:
- A commonly used term for electrodes, particularly in Shielded Metal Arc Welding (SMAW), where the electrode resembles a stick or rod.
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Wire:
- Referring to welding electrodes in wire form, commonly used in processes like Gas Metal Arc Welding (GMAW) or Flux-Cored Arc Welding (FCAW).
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6010:
- Pronounced as "sixty-ten," this refers to a specific type of electrode with characteristics defined by the AWS classification E6010.
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7018:
- Pronounced as "seventy-eight," this refers to an electrode with characteristics defined by the AWS classification E7018, commonly used for structural welding.
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TIG Rod:
- Referring to electrodes used in Tungsten Inert Gas (TIG) welding, typically made of non-consumable tungsten.
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MIG Wire:
- Referring to electrodes used in Gas Metal Arc Welding (MIG), where a continuous wire feed is used for welding.
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Flux Rod:
- Referring to electrodes with a flux coating, commonly used in Stick welding (SMAW).
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Dual Shield:
- Referring to flux-cored electrodes with a dual shielding mechanism, often used in Flux-Cored Arc Welding (FCAW).
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Nickel Rod:
- Referring to electrodes containing nickel alloy, suitable for welding materials with a high nickel content.
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Hardfacing Rod:
- Referring to electrodes designed for hardfacing applications, where the goal is to add wear-resistant material to a surface.
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Aluminum Wire:
- Referring to electrodes used in Gas Tungsten Arc Welding (GTAW) for welding aluminum.
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