Cast Iron Welding for Beginners

Cast Iron Welding

• In cast iron welding, two pieces of cast iron are joined together, or castings of iron are shaped and reshaped. This is accomplished through the use of a high-heat torch with a tightly focused flame known as a welding torch. In cast iron welding, the iron is superheated with the torch until it becomes pliable and sticky. It is then stuck onto another piece and shaped the way the welder wants it. If two pieces need additional strengthening or cannot be joined because of missing pieces, the welder uses a rod, also made of cast iron, to join them.

Challenges in Cast Iron Welding

• Cast iron welding is considered one of the more difficult kinds of welding because of the high carbon content in the iron, which can cause cooling cast iron to become brittle and shatter. Beginners should approach cast iron welding with caution, and take a course in it from a certified welding instructor or school if possible.

Cast Iron Welding Tips

• Individuals with other welding experience can attempt cast iron welding without specialized training. Online resource Welding Tips and Tricks recommends cleaning the iron thoroughly before welding; and preheating the iron you want to weld, over a grill or other heat source, to 400 to 500 degrees F. Cleaning the iron ensures that no debris or dirt gets into the weld, which would weaken it; and preheating the iron warms it slowly, helping prevent cracking or breaking when the flame of the torch is applied.

Learning to Weld

• If you have no welding experience at all, you should probably take a course before trying this tricky type of welding. The American Welding Society offers in-person classes around the country and online welding courses through American Welding Online. In addition to classes on welding cast iron and other materials for beginners, the AWO has seminars on specialty welding topics.