Applications
Welding of 3.5% Ni steel used for LNG tankers, LNG storage tanks and ethylene production equipments to be used at about -100°C.
Characteristics
The N-8016-C2 is an all positions extra low hydrogen type electrode for 3.5% Ni steel to be used at low temperature (lowest -100°C)
Good notch toughness of weld metal at low temperature is obtained because the weld metal contains about 3.5% Ni.
Notes on usage
(1) Pay attention not to exceed proper heat-input because excessive heat-input causes deterioration of impact values and yield strength of weld metal.
(2) Preheat at 50-100°C at the postheat at 600-620°C. The preheat temperature varies in accordance with the plate thickness and kind of steels.
(3) Dry the electrodes at 350-400°C for about one hour before use
(4) 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.
(5) Keep the arc as short as possible.
Typical Chemical Composition of Weld Metal (%):
C |
Si |
Mn |
|
Ni |
0.04 |
0.45 |
0.88 |
|
3.20 |
Typical Mechanical Properties of Weld Metal:
At 620 degrees Celsius x 1 hour
Yield Point
N/mm2 (Kgf/mm2) |
Tensile Strength
N/mm2 (Ksi) |
Elongation
(%) |
Impact Value
Deg C, J (Deg F, Ft-lbs) |
500 (73) |
610 (88) |
30 |
-73, 70 (-99, 52) |
Size and Recommended Current Range (AC or DC +):
Diameter (mm) |
2.5 |
3.2 |
4.0 |
5.0 |
Length (mm) |
350 |
350 |
400 |
400 |
Ampere |
Flat |
55-85 |
90-130 |
130-180 |
180-240 |
V & OH |
50-80 |
90-115 |
110-170 |
150-200 |
Welding Positions:
ALL POSITIONS
Packing:
20 Kg corrugated box, with 4 units of 5 Kg shrinked plastic wrapped paper boxes inside.
Special requests on packing are accepted. |
