Covered Electrodes LKE-7018

Characteristics:

LKE-7018 is a low hydrogen type electrode for the welding of 490N/mm2 grade high tensile steel. The welding can be done with high deposition rate, good X-ray soundness and mechanical properties.

Applications:

It is especially suitable for nuclear power stations, petroleum chemical plants, and heavy steel plates.

Notes on Usage:

1.Dry the electrodes at 300-350oc for 60 minutes and keep at 100-150oc before use.
2.Keep the arc as short as possible.
3.Take the back-step method to prevent blow holes at the arc starting.℃

Classification:

AWS A5.1 E7018
EN4 EN499 E 42 3 B 3 2
JIS Z3212 D5016

Welding position:

Typical chemical composition of weld metal (wt%)

C Mn Si P S
0.080 1.30 0.60 0.012 0.011

Typical mechanical properties of weld metal

Yield strength

MPa(ksi)

Tensile strength

MPa(ksi)

Elongation % Charpy V-Notch (J)
515 585 29 0ºC -29ºC
221 172

Sizes and recommended current range (AC or DC℃<+>℃)

Diameter (mm) 2.6 3.2 4.0 5.0
Length (mm) 350 350 400 400
Amps F 55-85 90-130 130-180 180-240
V&OH 50-80 85-120 110-160 150-200
Weight per pack(kg) 4/5 5 5 5
Weight per carton (kg) 20 20 20 20
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