The differences of welding electrodes

whats the main difference of welding Electrode

E6013 Welding Electrodes: Suitable for welding low carbon mild steel structures,especially for intermittent welding for small and thin plates and cosmetic welding which requests a neat welding surface. Both AC and DC.

E6011 Welding Electrodes: Suitable for butt,fillet and lap welding for thin plates structures,suchas smoke pipes,wind pipes,oil tanks of transformer,outside cover of vehicles,etc. Both AC and DC.

E6010 Welding Electrodes: Suitable for welding root passes,hot passes,filler and cover passes as well as for capping of general pipes and similar structures.

E7018 Welding Electrodes: Suitable for welding important medium carbon steel and low alloy steel. Both AC and DC.

E308-16 Welding Electrodes: It can be used for all position welding with excellent performances and used for welding 18Cr-8Ni(A1S1304),A1S1301,SUS308,etc.

ENiFe-CI Welding Electrodes: It is used for repairing important and high toughness parts made of gray cast iron and nodular iron,such as cylinder head.Both AC and DC.