aws e7018 1_welding electrodes pdf

        Cast iron welding rod is a welding rod used for cast iron, characterized by high strength and good plasticity. It is suitable for gray cast iron and ductile iron, and can be machined.
        Cast iron is usually classified according to the distribution of carbon in cast iron, and can generally be divided into white cast iron, gray cast iron, ductile cast iron, vermicular cast iron and malleable cast iron. Due to the high carbon content, uneven structure, low plasticity and poor weldability of cast iron, it is very easy to produce defects such as white cast iron, cracks and pores during welding. Special attention should be paid to the selection of welding process and welding materials during welding. For welding rod arc welding, it can basically be divided into two categories, one is the homogeneous weld type, namely cast iron type; the other is the heterogeneous weld type such as: steel (carbon steel or alloy structural steel, etc.), pure Ni (pure nickel 308), Ni-Fe (nickel iron 408), Ni-Cu (nickel copper 508), Ni-Fe-Cu, Fe-Cu, etc. When selecting welding rods, you can choose according to different cast iron materials, different cutting requirements, different service conditions and importance, different structural characteristics, stiffness, etc.

The use of Argon-Arc Welding Wire has been found to provide superior results compared to other types of welding wires in many applications. It produces higher quality welds due to its ability to control heat better than some other types. Additionally, it also increases productivity by reducing the time needed for each weld joint since fewer passes are required when using this type of wire compared with conventional methods. Furthermore, the use of Argon-Arc Welding Wire helps reduce distortion in the finished product because it allows for more precise temperature control during the welding process.