Welding material:Iow carbon steel,hard steel,medium carbon steel,Iowalloy stell.Please abide by the condition as follows for being used better:Surrounding temperature must be between-10degree and 40degree;Elevation height of the working place can't more than 1000m;The gas and powder may be come out in air of usual welding;Allow to perform in air with salt to the coastline zone;Power supply voltage is ?0% of rated voltage; Wind force is less than 1.5m/s at working place;It can't use in rain.