• Applications
  • Welding of 50kgf/mm² class high tensile strength steel of ships, bridges and structure.
  • Characteristics
    • - W 7018 is iron powder low hydrogen type electrode for all-position welding.
    • - Its usability is the best with direct current application as well as alternating current application.
  • Notes on Usage
    • - Remove dirts such as oil and scale from the groove.
    • - Dry the electrodes at 350~400℃(662~752℉) for 60 minutes before use.
    • - Keep the arc as short as possible
    • - Take the backstep method or strike the arc on a small steel plate prepared to prevent blowholes at the arc starting.
  • Sizes Available and Recommended Currents ( AC or DC ± )
  • Sizes Available and Recommended Currents ( AC or DC ± )
    Dia. (mm) 2.6 3.2 4.0 5.0 6.0
    Length (mm) 350 350 400 400 450
    Current
    (A)    		 F 60~100 90~130 130~180 180~240 250~300
    V-up & OH 50~80 80~120 110~170 150~200 -
  • Typical Chemical Composition of All-Weld Metal (wt%)
  • Typical Chemical Composition of All-Weld Metal (wt%)
    C Mn Si P S
    0.07 1.10 0.55 0.017 0.011
  • Typical Mechanical Properties of All-Weld Metal
  • Typical Mechanical Properties of All-Weld Metal
    Y.S MPa T.S MPa EL(%) CVN-Impact Value J
    (-30℃)
    505 575 30 125
  • Welding positions
  • Welding positions