N-7018

Specification

AWS Specification: AWS A5.1 E7018
JIS Specification: D5016
Other Specification: DIN E51 53 B 10

Description

Application

Remarks

  • Require a drag to 1/16 inches maximum arc length to obtain the desired mechanical properties and weld quality
  • An arc length of 1/8 inch or longer may result in porosity and serious deterioration of impact properties
  • Take the backstep method or strike the arc on a small steel plate prepared for this particular purpose to prevent blowholes at the arc starting
  • Polarity: Use DC (+) whenever possible with 4.0mm and smaller sizes
  • Technical Data

    TYPICAL CHEMICAL COMPOSITION OF ALL WELD METAL DEPOSITS (%):

    C

    Si

    Mn

    P

    S

    0.08

    0.56

    1.02

    0.013

    0.010



    TYPICAL MECHANICAL PROPERTIES OF ALL WELD METAL DEPOSITS:
    Yield Point
    N/mm2 (KSI)
     
    Tensile Strength
    N/mm2 (KSI)
     
    Elongation
    %
     
    Impact Value
    °C, J (°F, Ft-Lbs)
     

    510  (74)

    580 (84)

    30

    -29°, 145  (-20°, 107)



    TYPICAL DIFFUSIBLE HYDROGEN OF WELD METAL:
    Diameter (mm)
     
    Current (amp)
     
    Re-drying Condition
     
    Diffusible Hydrogen Mean Value
    (cc./100g)
     

    4.0

    AC

    350ºC x 0.5 hrs.

    3.0



    SIZE AND RECOMMENDED CURRENT RANGE: AC, DC (+)

    DIAMETER (mm)

    2.5

    3.2

    4.0

    5.0

    6.0

    LENGTH (mm)

    350

    350

    400

    450

    450

    Current Amp

    Flat

    70 - 100

    100 - 140

    150 - 200

    190 - 240

    250 - 320

    Vertical & Overhead

    60 - 90 

    80 - 120

    120 - 160

    140 - 180


    Welding Positions: ALL POSITIONS EXCEPT VERTICAL DOWN
    Approvals: ABS, BV, DNV, LRS, NKK

    NOTE:

    The information contained or otherwise referenced herein is presented only as “typical” without guarantee or warranty, and Industrial Welding Corporation expressly disclaims any liability incurred from any reliance thereon. Typical data and test results for mechanical properties, deposit, or electrode composition and other properties were obtained from a weld produced and tested according to prescribed standards and should not be assumed to be the expected results in a particular application or weldment. Actual results will vary depending on many factors, including, but not limited to, weld procedure, plate chemistry and temperature, weldment design, and fabrication methods. Users are cautioned to confirm by qualification testing, or other appropriate means, the suitability of any welding consumable and procedure before use in the intended application.