• Applications
  • Welding of aluminum-killed steel for low temperature used for LPG tankers and LPG storage tanks.
  • Characteristics
    • - W-NF is a graphite type coated electrode whose weld metal has the composition of 55%Ni- 45%Fe.
    • - As the hardening of fusion zone in cast iron is small and the coefficient of thermal expansion of the weld metal is about same as that of cast iron, mechanical properties and crack resistibility of the weld metal are good.
  • Notes on Usage
    • - Clean base metal before welding.
    • - If there is a possibility that cracking spreads, make the stopholes at both ends of repairing part.
    • - It is not necessary preheating and postheating in general but satisfactory results can be obtained by preheating at 100~200℃ in accordance with kind, shape and size of base metal.
    • - Keep the weld metal length less than 50mm(2 inch) to disperse welding heat.
  • Sizes Available and Recommended Currents ( AC or DC ± )
  • Sizes Available and Recommended Currents ( AC or DC ± )
    Size mm (in) 2.6 (3/32) 3.2 (1/8) 4.0 (5/32)
    Length mm(in) 350 (14) 350 (14) 400 (16)
    F 60~90 80~120 120~150
  • Typical Chemical Composition of All-Weld Metal (wt%)
  • Typical Chemical Composition of All-Weld Metal (wt%)
    C Mn Si P S Ni Fe
    0.95 0.82 0.35 0.007 0.006 55.2 Rem
  • Typical Mechanical Properties of All-Weld Metal
  • Typical Mechanical Properties of All-Weld Metal
    T.S(N/mm²) Hardness (HRB)
    568 91
  • Welding positions
  • Welding positions