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 200∼240℃ for one hour before use.
2. Optimum bead length/burned up electrode length ratio is 0.9∼1.3 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 Range（AC )
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