ARC Welding

The numbers on arc welding rods provide important details. The first two digits indicate the tensile strength in thousands of psi. The third digit shows the welding position usability. The fourth digit reveals the type of flux used. For example, E6010 means 60,000 psi tensile strength, suitable for certain positions, with specific flux properties. Welding … Read more

Arc force on a welding machine increases amperage when voltage drops. It prevents electrode sticking and stabilizes the arc length. This adjustment improves weld quality and enhances performance in various applications, such as overhead or vertical welding. As a result, it ensures a smooth and efficient welding process. Setting the arc force on a welding … Read more

Welding arc eye injury, known as ‘welder’s flash’ or ‘arc eye’, results from UV light exposure during welding. Symptoms include burning and discomfort in the eyes. The cornea usually heals in 1-2 days. Treatment involves rest, cold compresses, and artificial tears. Always wear safety goggles to prevent this injury while welding. Effective treatments for welding … Read more

Submerged-arc welding (SAW) is an arc welding process where an electric arc forms between a continuously fed electrode and the workpiece. A layer of powdered flux creates a protective gas shield and slag, which protects the weld zone. SAW can also add alloying elements to the weld pool for improved strength and quality. The SAW … Read more

Porosity in arc welding happens when nitrogen, oxygen, and hydrogen enter the molten weld pool. These gases can get trapped during solidification, creating tiny holes. Inadequate gas shielding is often a cause, as it lets atmospheric gases mix with the weld. This contamination results in defects in the weld metal. To prevent porosity in arc … Read more

Arc welding is named for its use of an electrical arc as the heat source for melting metal. In this process, a positive voltage goes to the electrode and a negative voltage to the base material. This generates an arc, which produces the thermal energy necessary for joining metals using a welding rod. Arc welding … Read more

Protective clothing for arc welding includes leather gloves, leather aprons, gauntlets, safety glasses, and welding helmets or goggles. These items safeguard the eyes, face, hands, arms, head, and body from hazards like sparks and heat generated during welding and cutting operations. Additionally, welders need gloves that offer heat resistance and dexterity. Heavy-duty leather gloves provide … Read more

{For arc welding, selecting the right shade glass is vital for eye safety. ANSI recommends these shades based on current: GTAW (150-500 A) needs shade 14; CAC-A light (<500 A) requires shade 12; CAC-A heavy (500-1000 A) uses shade 14; PAW (<20 A) needs shades 6-8. Always adhere to proper guidelines for safety.} For most … Read more

The minimum protective shade values for arc welding depend on the welding method and current. According to OSHA standards, for Gas Metal Arc Welding (GMAW) and Flux-Cored Arc Welding (FCAW), the shade is at least 10 for 250-500 amps. For Gas Tungsten Arc Welding (GTAW), the shade ranges from 8 to 10 based on the … Read more

An excessively long arc in welding leads to various issues. It increases spatter, reduces deposition rates, and causes undercuts. Furthermore, it can create porosity in the weld joint. Therefore, maintaining the correct arc length is essential for ensuring high-quality welds and minimizing defects. To achieve optimal results, welders can adopt specific techniques. For instance, adjusting … Read more