• Applications
  • WT-91B9 is designed for welding of 9%Cr-1%Mo-V steel used for high pressure vessels, oil refining industries etc.
  • Characteristics on Usage
    • - It is a rutile type flux cored wire for all-position welding.
    • - It has easy slag removal and good weld soundness.
    • - The weld metal contain about 9%Cr-1%Mo-V, so excellent creep rupture strength.
  • Notes on Usage
    • - Gas flow rate is proper 20~25ℓ/min.
    • - Shielding gas should be used Ar+20~25%CO2.
    • - Preheat at 200~300℃ and PWHT at 760℃.
  • 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 120~220A 140~260A 160~280A
  • Typical Chemical Composition of All-Weld-Metal (wt%) (Shielding gas : MIX)
  • Typical Chemical Composition of All-Weld-Metal (wt%)
    C Mn Si Cr Ni Mo V Nb
    0.09 0.66 0.20 9.1 0.49 1.0 0.20 0.05
  • Typical Mechanical Properties of All-Weld-Metal (Shielding gas : MIX)
  • Typical Mechanical Properties of All-Weld-Metal (Shielding gas : MIX)
    Y.S MPa T.S MPa EL(%) PWHT
    635 710 22 760℃×2hr
  • Welding position
  • Welding position