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NIHONWELD N-9018
AWS Specification: AWS A5.5 E9018
JIS Specification:
Other Specification:

            I. APPLICATIONS:

The 9018 is used for joining HY-90, HY-80, T-1 and other high tensile steels

 II.DESCRITIONS:

An outstanding electrode for welding higher strength steels with tensile strength in excess of 90,000 pse. The coating is specially formulated to resist moisture pickup under conditions of high heat and humidity. This electrode offers resistance to moisture re-absorption which helps prevent hydrogen cracking and aids in elimination of starting porosity.

III. NOTES ON USAGE:

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

  • Adopt back step method or strike the arc on a small plate prepared for this particular purpose because arc striking on base metal is in danger of initiating cracking.

  • Keep the arc as short as possible.

  • Preheat at 50-150°C before use.

  • Pay attention not to exceed proper heat-input because excessive heat-input causes deterioration impact values and yield strength of weld metal.

IV. TYPICAL CHEMICAL COMPOSITION OF ALL WELD METAL DEPOSIT (%):

C

Mn

Si

P

S

Ni

Cr

Mo

V

0.054

1.1

0.37

0.023

0.012

1.49

0.07

0.29

0.012

V. TYPICAL MECHANICAL PROPERTIES OF ALL WELD METAL DEPOSIT:

 

Yield Point

(psi)

Tensile Strength

(psi)

Elongation

%

Charpy 2 V-Notch

% at -60ºF, J (ft lbs)

84000

97400

25

48

VI. WELDING POSITIONS : ALL POSITIONS INCLUDING VERTICAL DOWN : 1G, 2F, 2G, 3G(UP), 4G

           VII.SIZE & RECOMMENDED CURRENT RANGE: AC OR DC (+)

 

DIAMETER (mm)

2.6

3.2

4.0

5.0

LENGTH (mm)

350

350

400

400

 

CURRENT

A

 

F

 

55-85

 

90-130

 

135-185

 

190-250

 

V, OH

 

50-80

 

80-120

 

110-170

 

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TEST RESULT

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.