• Applications
  • WT-91K2 is designed for welding of 620MPa high tensile steel for low temperature service.
    Typical applications include offshore structures, LNG and LPG carriers and storage tank.
  • Characteristics on Usage
    • - It is a titania type of flux cored wire for all-position welding.
    • - The weld metal contain about 1.5%Ni, so good impact value at low temperatures down to -60℃.
    • - It features good porosity resistance and easy slag removal.
  • 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.
    • - 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
    0.05 1.24 0.38 0.013 0.011 1.55
  • Typical Mechanical Properties of All-Weld-Metal (Shielding gas : CO2)
  • 용착금속의 기계적 성질의 일례
    Y.S MPa T.S MPa EL(%) CVN-Impact Value J
    (-60℃)
    603 645 27 83
  • Welding position
  • Welding position
  • Approved by
  • JIS