KT Group Members

Applications and Features

(1)     KFX-71T is suitable for welding 490N/mm² grade steel.

(2)     Good mechanical properties, crack resistance, less fume, stable arc, good slag removal, good bead appearance and excellent X-ray quality welds.

(3)     Ideal for welding ship-building, tank, construction machine, steel structure and bridge.

Welding position

Welding Instruction

Please refer to Appendix D.

Typical Chemical Composition of Weld Metal (wt%)

C

Si

Mn

P

S

0.05

0.46

1.45

0.018

0.007

Typical Mechanical Properties of Weld Metal

Tensile Strength

N/mm²

Yield Strength

N/mm²

Elongation

%

Charpy V-Notch

℃

J

556

483

30

-30

72

Size and Suggested Operating Range (DC+)

Diameter (mm)

1.2

1.4

1.6

F/HF

140~300A/23~36V

150~350A/22~34V

200~450A/28~42V

H

140~280A/22~33V

150~280A/22~32V

220~280A/23~29V

V-up/OH

140~220A/22~28V

150~230A/22~28V

160~280A/22~28V

V-down

230~280A/28~33V

250~300A/28~32V

250~320A/28~32V