N-7018

Specification
AWS Specification: AWS A5.1 E7018
JIS Specification: D5016
Other Specification: DIN E51 53 B 10
Description
  • N-7018 is an iron powder low hydrogen type electrode containing large amounts of iron powder in coating flux to give higher deposition rates
  • Deposited metal demonstrates excellent mechanical properties, crack resistance, and X-ray quality
  • Good weldability, such as smooth and stable arc, easy slag removal, low spatters, and nice bead appearance
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.

  • 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
  • Welding of 50 kgf/mm2 high tensile strength steels for ships, steel frames, bridges, and pressure vessels

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Industrial Welding Corporation (IWC) was established in 1982 by Mr. H. Ong Hai who had 25 years of welding industry experience (at that time). Since then, IWC has consistently and successfully earned an excellent ...
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