Can ordinary electrode be used for welding cast iron?
No way！ Cast iron electrodes must be used! Ordinary welding rod welding porosity is too much, not solid.
Yes, just increase the current
Ordinary electrode refers to 502 or 422 of low carbon electrode bar. Welding it with cast iron can be done two times. The first time with 3, 2 diameter electrode, then the current should be between 130 to 150 on it. Second times the current about 120, just right. This will make the strength better. Because the high current bite will be better, but the current is large, thin weld, low carbon electrode welding iron will appear pores and stress cracks. Just second times to make up for this flaw. But be careful not to solder too long. Large cracks are easy to occur. If welding second times, you can gently touch the weld to the stress. Before welding, remove foreign parts from the weld. With good grinding angle grinder. There are 502 to 422 effects better. You can also try to reverse the ground electrode and the welding pole, so that the welding arc will be more stable when welding.
