Welding Wires Number letter "J" structural Aluminium Alloy Welding Wire;
2, the first, the second digit indicates the minimum tensile strength of deposited metal kgf/mm2 (should be translated into the corresponding MPa) and is divided into 10 grades: 42,50,55,600,70 80,85,90,10 (100);
3, the third number indicates the the drug skin type, and the types of welding power;
4, the symbols after the third digit indicates a particular purpose, such as: "Fe" iron powder electrode; "X" represents Li down welding special electrodes:
 "G" for pipe welding electrodes.
 "GM" to cover the surface of special electrodes.
 "D" indicates the bottom weld special electrodes.
  "Z" represents a gravity welding rod.
 "GR" said high toughness electrodes.
  "LMA" said moisture-resistant welding rod.
  "H" ultra-low hydrogen electrodes.
 "R" represents toughness electrodes.
 "DF" said a low fluoride electrode.
 "RH" a high tough ultra-low hydrogen electrodes.
  A132 (stainless steel electrode) in front of him "A" on behalf of the austenitic stainless steel, Otis phonetic alphabet