For welding of welding safety products carbon steel and 500Mpa grade low-allow steel, such as vehicles, bridges, construction and machinery structure etc.Main Characteristics：1. Low welding costs. 2. High productivity and low electricity consumption. 3. Easy to operate. All-position welding. 4. Very low hydrogen content in the weld and lower nitrogen content. Excellent crack-resistance. 5. Little deformation after welding. 6. Wide applicability. Suitable for welding thin, medium and thick plates.