Weld smooth surface capping. J421Fe16 E4324 E6024 titanium AC, DC for general low-carbon steel welding, fillet welding. J421Fe18 E4324 E6024 titanium AC, DC for general low-carbon steel welding, fillet welding. J421X E4313 E6013 titanium AC, DC for welding carbon steel and galvanized steel marine ships, especially for thin vertical down welding and tack welds. J422 E4303 titanium calcium type AC, DC for welding low carbon steel and more important low intensity level low alloy steel structure, such as Q235,09MnV, 09Mn2 like. THJ422Fe E4303 titanium calcium type AC, DC applicable to the more important low-carbon steel welding. J422Fe16 E4323 titanium calcium type AC, DC for the more important low-carbon steel welding. J422GM E4303 titanium calcium type AC, DC applicable to the structure of the surface offshore platforms, ships, vehicles, construction machinery and other decorative seam weld. J423 E4301 ilmenite type AC, DC for welding low-carbon steel welding more important, such as vehicles, building construction, heavy machinery, construction and the like. J424 E4320 E6020 iron type AC, DC- more important weldable steel structures, such as heavy machinery, construction machinery and so on. J425 E4311 cellulose type AC, DC + sheet structure suitable for butt, lap and fillet welding. Such as power plant flue duct, the transformer tank, the vehicle hull and the outer carbon steel plate. J426 E4316 low hydrogen type AC, DC + for welding important structures of low carbon and low alloy steel, such as shipbuilding, bridges, pressure vessels. J427 E4315 low hydrogen type DC + for welding important low carbon steel compression load or low-alloy steel slab structure and the structure, such as machinery, shipbuilding, bridges, pressure vessels. J427D E4315 low hydrogen type AC, DC + dedicated to carbon steel and the corresponding strength low-alloy steel welding backing structure. Under J427Ni E4315 low hydrogen type DC + for low-alloy steel welding important structures of low carbon steel and the corresponding strength, such as ship steel (Q235 series A, B, D, E grade), boilers, bridges, pressure vessels and other low temperature conditions structure to withstand dynamic loads. J501Fe E5014 E7014 titanium AC, DC for welding carbon steel and low alloy structures, such as welding 16Mn, ships, vehicles and mechanical structure. J501Fe15 E4024 E7024 welding titanium AC, DC and low-alloy structural steel for welding, such as A, B, D grade steel, 16Mn and other ships, locomotives and boilers and other structures. J501Fe18 E4024 E7024 welding titanium AC, DC and low-alloy structural steel for welding, such as A, B, D grade steel, 16Mn and other ships, locomotives and boilers and other structures. J502 E5003 titanium calcium type AC, DC is mainly used for welding low alloy steel structure 490MPa tensile strength levels, such as steel and other building structures such as 16Mn steel welding. J503 E5001 ilmenite type AC, DC for low alloy steel, such as 16Mn and so on. J505 E5011 cellulose type AC, DC + is suitable for carbon steel, low alloy steel structure vertical down welding and fillet, such as 16Mn, 15MnVN like. J506 E5016 E7016 low hydrogen type AC, DC + for welding carbon steel and low alloy steel structures, such as 16Mn, 09Mn2Si and ships with A, B, D, E grade steel, but also for slabs and poor weldability welded steel structures. J506D E5016 E7016 low hydrogen type AC, DC + dedicated to carbon steel and low alloy steel structures underlying backing weld groove, such as 16Mn, 09Mn2Si and ships with A, B, D, E grade steel. J506Fe E5018 E7018 low hydrogen type AC, DC + for welding carbon steel and low alloy steel structures, such as 16Mn and so on. J506Fe-1 E5018-1 E7018-1 low hydrogen type AC, DC + for welding offshore oil platforms, ocean-going vessels and other steel and low alloy steel structures. J506Fe16 E5028 E7028 low hydrogen type AC, DC + carbon steel and low alloy steel structure welding, fillet welding is used, such as 16Mn, 09Mn2Si and ships with A, B, D, E grade steel. J506Fe18 E5028 E7028 low hydrogen type AC, DC + carbon steel and low alloy steel structure welding, fillet welding is used, such as 16Mn, 09Mn2Si and ships with A, B, D, E grade steel. J506H E5016-1 E7016-1 low hydrogen type AC, DC + for welding important carbon steel and low alloy steel structures. J506X E5016 E7016 low hydrogen type AC, DC + for carbon steel and low alloy steel structure vertical down fillet welding. J507 E5015 E7015 low hydrogen type DC + for welding important carbon steel and low alloy steel structures (compression, dynamic load), such as 16Mn, 09Mn2Si, 09Mn2V and ships with A, B, D, E grade steel, also used for welding thick plate and poor weldability of steel structures. J507D E5015 E7015 low hydrogen type DC + dedicated to carbon steel and low alloy steel structures underlying backing weld groove, such as 16Mn, 09Mn2Si and ships with A, B, D, E grade steel. J507Fe E5018 E7018 low hydrogen type DC + for welding carbon steel and low alloy steel structures, such as 16Mn and so on. J507Fe16 E5028 E7028 low hydrogen type DC + for carbon steel and low alloy steel structure welding, fillet welding, such as 16Mn, 09Mn2Si, 09Mn2V and ships with A, B, D, E grade steel. J507H E5015-1 E7015-1 low hydrogen type DC + for welding important carbon steel and low alloy steel structures. J507X E5015 E7015 low hydrogen type DC + for carbon steel and low alloy steel structure vertical down fillet welding. Carbon steel electrode Description: Executive GB / T5117-1995 standard carbon steel welding for carbon steel and low-strength low-alloy steel welding. Select the electrode according to the chemical composition, mechanical properties, crack resistance of the steel requirements, taking into account the welded structure, plate thickness, working conditions, a comprehensive analysis of the forces, welding performance and other factors. If necessary, do welding test, develop the appropriate technical measures, and then determine the choice of electrode. ⒈ carbon steel welding is generally used with the steel intensity level corresponding to the electrode, taking into account the complex structure, plate, stiffness, dynamic load, weldability poor, generally used in plastic, high impact toughness, crack resistance good low hydrogen electrode. There are special requirements for welding position, using the corresponding specific electrode, such as vertical down welding, welding and other backing. In order to improve the efficiency of welding iron type electrode can be used. ⒉ weld cooling speed, strength increased, weld cracks easily, then you can use the electrode base material strength than the low level; dissimilar steel welding mild steel and low alloy steel between the selection and the general strength the lower level of the corresponding steel electrode, low alloy steel and consider factors in order to use low-hydrogen appropriate. ⒊ for carbon steel welding, due to the higher carbon content of steel, increasing the weld cracking tendencies, generally used in low hydrogen electrodes and preheating, slow cooling methods and adapt welding technology and other measures. ⒋ steel weldability is poor, generally higher carbon content, the workpiece Heavy, complex structure, easy to produce welding cracks, when the cast alloy elements for a long time, even more prominent. Generally used in low hydrogen electrodes, and take preheated slow cooling methods and the appropriate welding technology and other measures. ⒌ To ensure the quality of welding, weld the workpiece should be clean, not allowed to have oil, rust, moisture, paint and dirt, etc., the use of low hydrogen type electrode is particularly important. ⒍ low hydrogen electrodes, before welding electrodes shall be subject to 350 ℃ baking 1h, and as baking, or easy to produce porosity, slag, cracks and other defects. Cellulose electrode generally do not need baking, if damp, according to the instructions provided before welding baking temperature, but the temperature is too high will damage the electrode welding performance. ⒎ specified in the instructions for the welding current reference value, the actual operation should be specific to master, such as preheating the workpiece, lower than the normal current 5% to 15%; vertical welding and overhead welding welding current is small than the flat 10% to 15%; when DC comparable exchange reduced about 10%. When using DC welder, welding attention to the instructions provided by the class nature, or affect the welding process. ⒏ low hydrogen electrodes should not normally be repeated baking, to prevent drug skin crisp, fall off.