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NIHONWELD N-7018-A1
AWS Specification: E7018-A1
JIS Specification:

DT1216

Other Specification:

DIN EMoB26

 I. APPLICATIONS:

 

Welding of 0.5% Mo steel used for high temperature and high pressure boiler, pressure piping and tubing and other pressure vessel, chemical and oil refining industries.

II. DESCRIPTIONS:

N-7018-A1 is an iron powder low hydrogen type electrode for all-position welding which provides the weld metal of 0.5% Mo.

III. NOTES ON USAGE:

  • Dry the electrodes at 325-375ºC for about one hour before use.

  • Preheat at 100-200ºC and post heat at 620-680ºC.

  • 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 COMPOSITIONS OF WELD METAL (%):

 

C

Si

Mn

P

S

Mo

0.08

0.54

0.78

0.015

0.010

0.56

V. TYPICAL MECHANICAL PROPERTIES OF WELD METAL:

 

Yield Strength

N/mm2 (Ksi)

Tensile Strength

N/mm2 (Ksi)

Elongation

PWHT

590 (86)

680 (99)

28

620 ºCx 2 hrs

VI. WELDING POSITIONS: ALL POSITIONS

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

 

Diameter (mm)

2.6

3.2

4.0

5.0

6.0

Length (mm)

350

350

400

400

450

Amp.

F

50-90

80-130

130-190

180-240

230-300

V & OH

40-80

70-120

110-170

150-200

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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.