Repair and build-up of cast iron parts as auto blocks and heads, cylinder walls, motor exhaust ports, impeller rings, valve sets, cast iron dies, casting; correcting machining errors, joining steels to cast iron, etc.

Use AC or DC+ current. Except for heavy and complicated pieces where high stresses may be developed or where there is a large amount of welding to be done preheating is not necessary. Joints or parts cracks should be grooved if the damaged parts is more than 5.00mm thick. Root joint should be free from grease, oil, rust, paint or dirt. use lowest current practical, depositing short intermittent beads about 25mm to 50mm. Remove all traces of slag remains before applying the next bead. Proceed slowly so that the work does not become too hot. When preheating is required, the whole piece should be kept at a temperature of at least 260 degrees celsius. Do not preheat only a small part of the job, but keep the whole piece hot. For very heaving casting it is best to cool in had, asbestos or mica. For building up large and deep grooves, the most economical procedure is to use WIPWELD 16 up to 3.25mm of the surface to be machined and then finish off with WIPWELD NI.