Welding rod model based on the mechanical properties of the deposited metal sub-medicated skin types, types of welding current, welding position. E stands for welding rod mean J represents structural steel electrode Z represents a cast iron electrode T represents a special electrode D represents surfacing electrode G stands for chromium stainless steel electrode A representative of stainless steel electrode The specific type of structural steel welding rod, molybdenum and chrome molybdenum steel electrode, stainless steel electrode, welding electrodes, low temperature welding rod, cast iron welding rod, nickel and nickel alloy rod, copper and copper alloys, aluminum and aluminum alloys E43 Series - Deposited metal tensile strength> = 420MPa (43kgT/mm2) The letter E indicates electrode, the first two digits indicate the deposited metal tensile strength of the smallest, and the third digit indicates the the electrode welding position, number 0 or 1 welding to be suitable for all-position welding, 2 said to be suitable for flat welding or plane welding, said welding rod down welding, the third and fourth digit combination indicates the type of welding current and the drug skin types, and fourth digits followed by the letter R indicates resistance to moisture absorption electrodes, M resistant to moisture absorption and mechanical properties of the special provisions electrode, additional -1 indicates that the impact properties of the special provisions of the welding rod. E4301, E4303, E4310, E4311, E4312, E4313, E4315, E4316, E4320E4322, E4323, E4324, E4327, E4328, E50, E5001, E5003, E5310, E5311, E5314, E5315, E5315, E5316, E5318, E5318M, E5323, E5324, E5327, E5328, E5348