Welding Points and Precautions of Stainless Steel First, the vertical characteristics of the power supply, DC using a positive polarity (wire connected to the negative) 1, generally suitable for the following sheet of 6mm welding, welding with beautiful appearance, the characteristics of small welding deformation. 2, the protective gas is argon, the purity is 99.99%. When the welding current is 50 ~ 150A, argon flow rate of 8 ~ 10L / min, when the current is 150 ~ 250A, argon flow rate of 12 ~ 15L / min.0.8 mm stainless steel sheet 3, the length of the tungsten protruding from the gas nozzle to 4 ~ 5mm better in the fillet welding and other shielding poor place 2 ~ 3mm, in the slot deep place is 5 ~ 6mm, the nozzle to the work of the general distance of not more than 15mm . 4, in order to prevent the emergence of welding stomata, welding parts such as rust, oil, etc. must be clean.

• Stainless Steel Properties Table 5, the welding arc length, welding ordinary steel to 2 ~ 4mm is better, and welding stainless steel to 1 ~ 3mm good, too long to protect the effect is not good. 6, butt backing, in order to prevent the back of the bottom of the bead is oxidized, the back also need to implement gas protection.
• ultra high strength stainless steel 7, in order to argon gas well to protect the welding pool, and to facilitate the welding operation, the tungsten center line and welding parts should generally maintain 80 ~ 85 ° angle, filler wire and the workpiece surface angle should be as small as possible, Generally about 10 °. 8, wind and ventilation. Where there is wind, please take measures to block the network, and in the room should take appropriate ventilation measures.
• Hardness of metal material