GUIDELINES FOR WELDING CAST

IRON (CONT.)

good procedures are followed. If the casting must be water tight, this can be a problem. However, leaking can usually be eliminated with some sort of sealing compound or they may rust shut very soon after being returned to service.

The Studding Method - One method used to repair major breaks in large castings is to drill and tap holes over the beveled surface area. Screw studs into the holes leaving 3/16” (4.8mm) to 1/4” (6.4mm) of the stud above the surface. Then, using the standard methods and electrodes described here, weld the studs in place and cover the entire surface of the break with weld deposit. Once a good weld deposit layer is made, the two sides of the crack can be welded together with more conventional methods. However, overheating the casting area must still be avoided.

In cases of severe damage, use of mild steel plates sometimes produces good results. To do this, cut out the damaged area. Fit a piece of mild steel of the appropriate size in the damaged area and weld the steel to the cast iron. Use the welding methods and electrodes used to weld cast iron to cast iron.

ALUMINUM ARC WELDING ELECTRODES

PROCEDURES - USE ELECTRODE POSITIVE (DC+)

Hold a short arc with the coating almost touching the molten pool. Use the highest current possible without melting the edges back too far or burning through.

The high melting rate of the aluminum electrode combined with the high conductivity of the aluminum plate chills the weld rapidly. Therefore, to keep the pool molten long enough to form well-shaped beads preheating to 600-700°F is often needed.

Strike the electrode by “scratching”. Strike the arc in the crater of the previous bead, then quickly move back along the weld for 1/2” (12.7mm) and proceed as usual. Be sure the crater is completely remelted.

Hold the electrode almost perpendicular to the work at all times to obtain even melt-off of the flux. Point the arc directly into the joint so both edges are properly and uniformly heated.

For tacking, use currents about 20% above the maximum current listed in the recommended ranges. Use a short arc with a rotary motion.

Remove the last traces of slag with warm water and a wire brush or by soaking the weld in a 5% nitric acid or 10% warm sulfuric acid solution followed by a warm water rinse.

WARNING: Be careful with these strong acid solutions. Wear safety glasses and avoid contact with skin or clothing.

Avoid out-of-position welding.

Aluminweld can also be used as a filler rod with a carbon arc torch.

Customer Assistance Policy

The business of The Lincoln Electric Company is manufacturing and selling high quality welding equipment, consumables, and cutting equipment. Our challenge is to meet the needs of our customers and to exceed their expectations. On occasion, purchasers may ask Lincoln Electric for advice or information about their use of our products. We respond to our customers based on the best information in our possession at that time. Lincoln Electric is not in a position to warrant or guarantee such advice, and assumes no liability, with respect to such information or advice. We expressly disclaim any warranty of any kind, including any warranty of fitness for any customer’s particular purpose, with respect to such information or advice. As a matter of practical consideration, we also cannot assume any responsibility for updating or correcting any such information or advice once it has been given, nor does the provision of infor- mation or advice create, expand or alter any warranty with respect to the sale of our products.

Lincoln Electric is a responsive manufacturer, but the selection and use of specific products sold by Lincoln Electric is solely within the control of, and remains the sole responsibility of the customer. Many variables beyond the control of Lincoln Electric affect the results obtained in applying these type of fabrication methods and service requirements.

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WEB SITE: www.lincolnelectric.com

Cast Iron/Non-Ferrous

C8.10 6/99

web update 5/08

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Lincoln Electric Cast Iron and Aluminum Arc Welding Electrodes manual Aluminum ARC Welding Electrodes
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Cast Iron and Aluminum Arc Welding Electrodes specifications

Lincoln Electric is a recognized leader in the welding industry, renowned for its innovative products and advanced technologies. Among its diverse offerings, the range of cast iron and aluminum arc welding electrodes stands out for its exceptional performance and reliability in various applications.

One of the key features of Lincoln Electric's cast iron electrodes is their ability to provide strong, durable welds, making them ideal for repairing or fabricating cast iron components. They are designed to accommodate the typical properties of cast iron, which can be challenging to weld due to its brittleness and tendency to crack. The electrodes utilize a specially formulated coating that enhances arc stability and reduces spatter, resulting in a cleaner finish and more efficient operation.

In addition to cast iron, Lincoln Electric's aluminum welding electrodes are engineered to address the unique characteristics of aluminum. These electrodes offer excellent moisture resistance and are formulated to work effectively with various aluminum alloys. Their high conductivity ensures a reliable arc, while their ability to produce high-quality welds with minimal distortion makes them suitable for applications in automotive, aerospace, and manufacturing sectors.

Lincoln Electric employs advanced technologies in the production of its welding electrodes. The company utilizes cutting-edge manufacturing processes to ensure consistent quality and performance across its entire product line. The electrodes are designed to provide superior arc stability, which is essential for maintaining control during the welding process, especially in difficult positions or when working on thin materials.

Another noteworthy characteristic of Lincoln Electric's welding electrodes is their versatility. They can be used with different welding machines, including conventional stick welders and advanced inverter systems. This adaptability makes them suitable for various environments, from industrial settings to DIY projects.

Furthermore, Lincoln Electric emphasizes safety and ease of use in its electrode designs. The ergonomic features and clear labeling on the packaging guide users, helping to ensure safe handling and effective application.

In summary, Lincoln Electric's cast iron and aluminum arc welding electrodes embody a blend of innovation, durability, and versatility. With their advanced formulations and technologies, these electrodes are designed to meet the demanding needs of welders across multiple industries, making them an essential tool for achieving high-quality welds in both cast iron and aluminum applications.
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