Can the Q345A board be welded with 422 electrodes?What kind of welding is best?Thank you!
Q345 low alloy high strength steel is the former 16Mn steel
Yes, it does matter. Using J507. Because they are all in the 50 kilogram class.
Using J506 and J507 manual metal arc welding electrodes, for important structures or at low temperature using the best use of super low hydrogen electrode: for small thickness, narrow gap workpiece, use J426 or J427 electrode; for thickness less than 14MM non important structure, available J502 and J503 electrode and other electrodes submerged arc welding when does not breach butt or fillet with H08A wire, when the thickness is large, deep crevasse with H08MNA, H08MN2 wire, flux of HJ430.HJ431, HJ433.2 with H08MN2SI.H10MNSI welding wire.
Q345A (16Mn) is a low carbon structural steel. The electrodes that match the grade strength are the J50- series (E50--)Non important construction can be welded with J502 (E5003) titanium calcium type acid welding rod. The welding rod is good in welding technology and easy to remove slag. The electrode is cheap and suitable for AC welder and DC welding machine. The disadvantage is that the toughness is inferior to the basic electrode.The most important structures can be welded with J506 (E5016) low hydrogen potassium basic electrode. The electrode is suitable for welding of alternating current welding machines with no-load voltage equal to greater than 70V and load rate equal to greater than 60%. And welding of DC welding machine. The electrode contains arc stabilizer, suitable for AC DC welding machine welding.An important structure, such as a rigid larger member, a pressure vessel. Or other structural parts requiring higher welding. Using J507 (E5015) low hydrogen sodium type basic welding rod welding. The electrode does not contain arc stabilizer. Only AX arc welding generator, ZX5 SCR direct current welding machine, ZX7 inverter type DC welding machine welding. ZXG series silicon rectifier welding machine is affected by the fluctuation of input voltage, so it can not be used.
