Can ordinary 422 electrode welding pig iron?
No welding, it will crack, like the 2012 blockbuster film in the same terrible crack.
If your "pig iron" refers to white cast iron, then please dispel the concept of welding. If the volume is not too large gray cast iron, the actual method of operation is cast iron hot welding.Equipment: cutting gun, AC welderProcess: welding workpiece positioning, and then open the oxygen preheating heating by gas burners for welding of cast iron by glowing red hot, and then use the 507 electrode welding current. Better heat preservation if the casting sand is used after soldering.
Not welding, easy to fall off after welding, resulting in more defects more defects. Can use cast iron welding rod Z308, the worst to use A302.
