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
Special vacuum packaging for longer shelf life and protection against moisture

https://www.youtube.com/watch?v=Fm0rArBqcMQ

Application

Welding of 50 kgf/mm² high tensile strength steels for ships, steel frames, bridges, and pressure vessels
General civl construction works

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
Current Amp	Vertical & Overhead	60 - 90	80 - 120	120 - 160	140 - 180	-

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

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.