E, Mig Welding Rod The first two digits indicate the minimum tensile strength of deposited metal, kg (shall be converted into the corresponding Mpa). The 3 numerals welding position: 0 and 1 can be all-position welding (Ping, Yang, Li, Wang). 2 electrodes applied to the flat weld fillet welding. 4 shows the vertical down welding. 3 and 4 number combinations that type of welding current and medicated skin type. The "R" in the fourth digit after additional resistance to moisture absorption Welding Electrode additional "M" resistance to moisture absorption and mechanical properties of the electrodes of the special provisions, additional "-1", said the impact properties of the special provisions of the welding rod. Example 1: E4315, expressed the low sodium hydrogen type electrode for all-position welding current types DCRP, weld metal tensile strength ≥ 420Mpa (43kgf/mm2). Example 2: E4316, said the low potassium hydrogen type electrode for all-position welding current types for AC or DC reverse Deposited metal tensile strength ≥ 420Mpa (43kgf/mm2). The E4328, said iron powder low hydrogen type electrode, suitable for flat welding, fillet welding current types for AC or DC reverse the deposited metal tensile strength ≥ 420Mpa (43kgf/mm2).