• Applications
  • WT-81M is designed for welding of 590MPa high tensile steel with slow freezing slag system.
    Typical applications include machineries, shipbuilding, offshore structures, bridges and general fabrications.
  • Characteristics on Usage
    • - WT-81M is a rutile type of 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 Ar+20~25% CO2.
  • Sizes Available and Recommended Currents ( DC +)
  • 용착금속의 기계적 성질의 일례
    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 140~220A 140~260A 160~280A
  • Typical Chemical Composition of All-Weld-Metal (wt%) (Shielding gas : MIX)
  • 용착금속의 기계적 성질의 일례
    C Mn Si P S Ni Mo
    0.03 1.39 0.45 0.006 0.001 0.94 0.003
  • Typical Mechanical Properties of All-Weld-Metal ( Shielding gas : MIX)
  • 용착금속의 기계적 성질의 일례
    Y.S MPa T.S MPa EL(%) CVN-Impact Value J
    (-30℃)
    587 633 30 130
  • Welding position
  • 용접자세
  • Approved by
  • KS, JIS