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NIHONWELD N-7018LT
AWS Specification: AWS A5.5 E7018-G
JIS Specification:
Other Specification:

I. APPLICATIONS:

For aluminum-killed steel used at low temperature, LPG tankers and LPG storage tanks, etc.

II. DESCRIPTIONS:

 N-7018LT is an LMA (low moisture absorption) electrode with very good mechanical properties suitable for demanding applications, such as offshore. The weld metal contains approximately 1% Ni for high impact values down to -40°C. The coating is of the latest LMA type for optimum resistance to porosity and hydrogen cracking.

 III.  NOTES ON USAGE:

  • Dry the electrodes at 300-350°C (572-622°F) for 60 minutes before use.

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

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

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

C

Si

Mn

Ni

0.06

0.40

1.20

0.80

V. TYPICAL MECHANICAL PROPERTIES OF DEPOSITED METAL

Tensile Strength N/mm2 (Ksi)

Yield Point N/mm2 (Ksi)

Elongation %

ImpactValue

°C, J (°Ft-Lbs)

550 (80)

460 (67)

34

-46°, 90 (-51°, 66)

 

VI. WELDING POSITIONS: ALL POSITION-EXCEPT VERTICAL DOWN

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

 

Diameter, mm

Length, mm

2.5

350

3.2

350

4.0

350

5.0

400

Current, A

75-110

110-150

150-200

190-275

 

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.