• Applications
  • WT-71 is designed for welding of 50kgf/mm² class high tensile steel. All position welding of building, shipbuilding, bridges, machinery, vehicles, offshore structures and general fabrications.
  • Characteristics on Usage
    • - WT-71 is rutile type flux cored wire for all position welding.
    • - Compared with solid wire, good X-ray safety, spatter loss is low, bead appearance is beautiful and arc is soft with good stability.
    • - Slag covering is uniform with good removal.
    • - WT-71 has very efficient welding due to higher deposition rate.
  • Notes on Usage
    • - Proper preheating(50~150℃) and interpass temperature must be used in order to release diffusible hydrogen which may cause cracking in weld metal when electrodes are used for medium and heavy plates.
    • - One-side welding defects such as hot cracking may occur with wrong welding parameter such as high welding speed.
    • - Shielding gas should be used 100%CO2 or Ar+20~25% CO2.
  • Sizes Available and Recommended Currents ( DC + )
  • Sizes Available and Recommended Currents ( DC + )
    Dia(mmØ) 1.2 1.4 1.6
    Position
    F Amp 180~340A 200~360A 200~420A
    HF 180~340A 200~360A 200~420A
    V-up, OH 120~220A 140~260A 160~280A
  • Typical Chemical Composition of All-Weld-Metal (wt%) (Shielding gas : CO2)
  • Typical Chemical Composition of All-Weld-Metal (wt%)
    C Mn Si P S
    0.04 1.29 0.55 0.013 0.010
  • Typical Mechanical Properties of All-Weld-Metal (Shielding gas : CO2)
  • Typical Mechanical Properties of All-Weld-Metal
    Y.S MPa T.S MPa EL% CVN-Impact Value J
    (-20℃)
    548 580 28 76
  • Welding position
  • Welding position
  • Approved by
  • KS, ABS, DNV, KR, NK, LR, BV, JIS, CE, CWB