1 level characteristics of welding power source, DC reverse polarity ( Welding Wire  connected the cathode)(2) generally use pure argon (purity 99.99%) or Ar +2% of O2, the flow 20 ~ 25L/min appropriate.3 arc length, stainless steel MIG welding, generally down in the conditions of the spray transfer welding voltage to be adjusted to the extent of the arc length in the 4 ~ 6mm.(4) wind. MIG welding is susceptible to the influence of wind, sometimes breeze air hole, and wind speed in 0.5m/sec above the place, should take precautions.The stainless steel flux cored wire welding points for attention:1 level characteristics of welding power source, DC welding with reverse polarity. General CO2 welder welding wire feed wheel pressure slightly loosen.2 shielding gas is usually carbon dioxide gas, the gas flow 20 ~ 25L/min more appropriate.(3) Welding Electrode the distance between the tip and the workpiece to 5 ~ 25mm is appropriate.Dry stretch the length of the welding current of 250A the following about 5mm above 250A about 20 ~ 25mm more appropriate.