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NIHONWELD N-7048
AWS Specification: AWS A5.1 E7048
JIS Specification:

D5016

Other Specification:

DIN E5155B9

I. APPLICATIONS:

Vertical downward welding of ships, building and bridges.

II. DESCRIPTIONS:

N-7048 is a low hydrogen type electrode for exclusively vertical downward welding. Mechanical properties and crack resistibility of weld metal are good and slag is self-lifting. As higher amperage can be used, the efficiency of vertical welding is remarkably improved compared with vertical upward welding.

III. NOTES ON USAGE:

 

  • Manipulate the electrode straight downward without weaving and press its tip against the mother plat as shown in the sketch.

  • Dry the electrodes at 350-400oC for about 60 minutes before use.

  • Keep the arc as short as possible.

  • 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. 

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

 

C

Si

Mn

P

S

0.08

0.54

0.9

0.01

0.01

V. TYPICAL MECHANICAL PROPERTIES OF WELD METAL: 

VI. WELDING POSITIONS: VERTICAL DOWN

VII. SIZE AND RECOMMENDED CURRENT RANGE (AC or DC +):

 

Diameter (mm)

 

3.2

4.0

5.0

Length (mm)

 

400

450

450

Ampere

Vertical Down

100 - 160

140 - 210

220 - 270

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.