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NIHONWELD N-7018-W
AWS Specification: E7018-W1
JIS Specification:

DA5026G

Other Specification:

 

I. APPLICATIONS:

Welding of 50 kgf/mm2 class high tensile strength weather proof steel of structures, building, vehicles and bridges.

 II. DESCRIPTIONS:

      N-7018-W is an all position iron powder low hydrogen type electrode which exhibits high crack resistibility and superior notch toughness of depositing weld metal. It is suitable for welding comparatively thick plates of weather proof steel.

 III. NOTES ON USAGE:

  • Dry the electrodes at 350-400°C for about one hour before for 30-60 minutes before use.

  • Adopt back step method or strike the arc on a small steel plate prepared for this particular purpose to prevent blowholes at the arc starting.

  • Keep the arc as short as possible

IV. TYPICAL CHEMICAL COMPOSITION OF DEPOSITED METAL (%):

 

C

Si

Mn

Cr

Ni

Cu

0.06

0.41

0.59

0.25

0.36

0.30

 V. TYPICAL MECHANICAL PROPERTIES OF  DEPOSITED METAL:

 

Yield Point

N/mm2 (ksi)

Tensile Strength

N/mm2 (ksi)

Elongation

%

Impact Value

°C, J (°F, Ft-Lbs)

460 (67)

560 (81)

31

-18°, 142 (0°, 105)

 VI. WELDING POSITIONS: ALL POSITIONS

VII. SIZES & RECOMMENDED CURRENT RANGE: AC or DC (+)

 

Diameter, mm

Length, mm

2.5

350

3.2

350

4.0

400

5.0

400

Current,

A

F

55-85

90-130

130-190

200-240

V, OH

50-80

70-110

100-170

160-210