• Applications
  • WT-81 is designed for welding of 590MPa high tensile steel with slow freezing slag system. Typical applications include machinery, shipbuilding, offshore structures, bridges and general fabrications.
  • Characteristics on Usage
    • - WT-81 is a rutile type flux cored wire for all-position welding.
    • - It provides smooth arc, low spatter levels, good weldability and good bead appearance.
  • Notes on Usage
    • - Proper preheating(50~150°C) 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.
    • - Gas flow rate is proper 20~25ℓ/min.
    • - Shielding gas should be used 100% 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 Ni Mo
    0.03 1.27 0.48 0.014 0.011 0.97 0.10
  • 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
    (-30℃)
    551 625 28 70
  • Welding position
  • Welding position
  • Approved by
  • KS, JIS