CHE421 (J421) comply with: GB E4313 considerable: AWS E6013 Description: CHE421 titanium oxide type coating of carbon steel electrode, AC and DC. Can be all-position welding, good operating performance, then arc easy. Usage: welding low carbon steel, especially for small pieces of sheet metal and welding and short intermittent welds require smooth surface capping. Deposited metal chemical composition: (%) C Mn Si SP - - - ≤0.035 ≤0.040 deposited metal mechanical properties: Tensile strength (бb) Mpa yield point (бs) MPa Elongation (δ5)% ≥420 ≥330 ≥17 X-ray detection requirements: Level Ⅱ reference current: (AC or DC) electrode diameter (mm) 2.0 2.5 3.2 welding rod length (mm) 300 300 350 Welding current (A) 40-70 60-90 80-130 electrode diameter ( mm) 4.0 5.0 5.8 Electrode Length (mm) 400 400 400 Welding current (A) 150-190 180-250 220-280