Learn weld cast iron to prevent cracks.
According to Lincoln Electric, it is very difficult to weld cast iron. The difficulty is primarily due to the carbon content of cast iron, which is about 10 times higher than other steels. Because of the high carbon content, cast iron tends to create flakes of graphite, which gives the cast iron its grey appearance. You can prevent cracking when the cast iron casts are made; if cracks already exist in the cast iron, there is also a way you can repair the cracks.
Instructions
1. Pour molten iron into the casting mold.
2. Weld the cast iron at temperatures below 1450 degrees Fahrenheit. When the welding process reaches this temperature or higher, cracking in the cast iron can occur.
3. Allow the cast iron to remain below the 1450 degree temperature during and after the welding process to prevent cracks.
4. Seal any cracks. Cracks tend to appear in cast iron near the sites where it is welded. Rub sealing compound on the cracks if you need the cast iron to be watertight or to prevent further cracking.
Tags: cast iron, cast iron, below 1450, carbon content, carbon content cast
