Welding rods, also known as welding electrodes, are essential tools in the welding process. They are used to conduct current between the welding machine and the workpiece to create a strong joint. Here’s a detailed description:
Types of Welding Rods
- Consumable Welding Rods:
- These melt during the welding process and become part of the weld.
- Examples: E6013, E7018 (used in shielded metal arc welding or stick welding).
- Non-Consumable Welding Rods:
- These do not melt into the weld but conduct the arc for melting the workpiece material.
- Example: Tungsten electrodes (used in TIG welding).
Key Features
- Coating: Most welding rods are coated with flux to protect the weld from contaminants like oxygen and moisture.
- Material Composition: Made from metals like steel, aluminum, or other alloys, depending on the welding application.
- Size: Available in various diameters (e.g., 2.5mm, 3.2mm, 4.0mm) and lengths to suit specific projects.
Applications
- Mild Steel Rods: Used for general fabrication and structural work.
- Stainless Steel Rods: Ideal for corrosion-resistant applications.
- Specialty Rods: For cast iron, hardfacing, and aluminum welding.
Selection Criteria
- Type of metal being welded.
- Welding position (flat, vertical, overhead).
- Power supply (AC or DC).
- Required strength and appearance of the weld.
