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JIS D5018
AWS E7018

Description and Applications

HE7028 is an iron powder electrode for flat and horizontal fillet welding. Slag detachability is good and high efficiency is assured due to its high deposition rate. Deposited metal shows excellent mechanical properties and crack resistance. It is also suitable for multi-layer fillet welding and gravity welding.

For the welding of 500N/mm2 high tensile steel for ships, bridges, and structures.

 
Guideline in Usage
1.

Electrodes should be re-dried at 200240℃ for one hour before use.

2. Optimum bead length/burned up electrode length ratio is 0.91.3 for gravity welding.
3. Back step method should be applied to prevent blowholes and pits. Keep the arc as short as possible.
 
 
Typical Chemical Composition of Weld Metal(%)
C Si Mn P S
0.08 0.14 0.98 0.024 0.010
 
Typical Mechanical Properties of Weld Metal
Yield Strength
N/mm2
Tensile Strength
N/mm2
Elongation
Impact Value
J(-18℃)
440 540 28 60
 
Size & Recommended Current RangeAC )
Diameter (mm)
4.0 5.0 5.5 6.0 6.4 7.0 8.0
Length (mm) 

400
450

550
700
550
700
550
700
550
700
550
700
550
700
Current (Amp) F
H-FIL
160~
200
240~
300
260~
320
300~
360
330~
390
340~
370
380~
420