KT Group Members

Applications and Features

(1)     KFX-712C is suitable for welding 490N/mm² grade steel.

(2)     Excellent impact toughness at low temperature after PWHT.

(3)     Ideal for welding ship-building, tank, construction machine, pressure vessel, steel structures and bridges.

Welding position

Welding Instruction

Please refer to Appendix D.

Typical Chemical Composition of Weld Metal (wt%)

C

Si

Mn

P

S

0.08

0.43

1.43

0.017

0.008

Typical Mechanical Properties of Weld Metal

Tensile Strength

N/mm²

Yield Strength

N/mm²

Elongation

%

Charpy V-Notch

Heat Treatment

℃

J

596

555

27

-40

47

As-welded

573

494

29

-40

48

620℃x 6hr

Size and Suggested Operating Range (DC+)

Diameter (mm)

1.2

F/HF

140~300A/23~36V

H

140~280A/22~33V

V-up/OH

140~220A/22~28V

V-down

230~280A/28~33V