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NIHONWELD N-8018-C2
AWS Specification: AWS A5.5 E8018-C2
JIS Specification:

NONE

Other Specification:

I. APPLICATIONS:

The N-8018-C2 is primarily used for welding 3% nickel steels intended for low temperature service, such as found in the production or storage of propane and liquid ammonia. USA 8018-C2 is commonly used to weld ASTM A8, A203, A333 Gr.3, A334, A352 Gr. LC3, A350 Gr. LF3 and others. Preheating is recommended for highly hardenable steels and is used to prevent cracking during cooling.

II. DESCRIPTIONS:

The N-8018-C2 is a low alloy, low hydrogen, iron powder electrode designed for welding 3% nickel steel and aluminum-killed steel where low temperature impact properties must be good. This electrode offers fast and efficient deposition in all positions.

III. NOTES ON USAGE:

  • Dry the electrodes at 350-400°C for about one hour before use and store the electrodes at 100-150°C after drying them with attention to keep away from moisture.

  • Adopt back step method or strike the arc on a small steel 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 100-150°C. The temperature to be applied varies in accordance with plate thickness and kind of steel to be welded.

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


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

C

Si

Mn

Ni

0.07

0.32

1.12

3.45

IV. TYPICAL MECHANICAL PROPERTIES OF DEPOSITED METAL : AT 620 °C, 1 HR

 

Tensile Strength N/mm2 (Ksi)

Yield Point N/mm2

(Ksi)

Elongation %

Impact Value

Deg C, J (Deg F, Ft-lbs)

650 (94)

570 (83)

23

-73°, 80 (-99°,59)

VI. WELDING POSITIONS: ALL POSITIONS

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

 

Diameter (mm)

 

2.5

3.2

4.0

5.0

Length (mm)

 

350

350

400

400

Ampere

Flat

65 - 90

90 - 130

135 - 185

190 - 250

V & OH

60 - 90

80 - 120

110 - 170

160 - 210