KT Group Members

Applications and Features

( 1 ) KFT-X347 produces slag to protect the reverse side of the root pass from oxidation by the atmosphere and saves the cost for back shielding gases and gas purging downtime including the setting time for gas purging jigs.

( 2 ) Suitable for welding 18%Cr-8%Ni-Nb steel (AISI 347) and18%Cr-8%Ni-Ti steel (AISI 321).

Welding Position

Welding Instruction

( 1 ) Formation of key-hole during welding is very important in order to supply slag onto reverse side bead.

( 2 ) The melting rate of flux cored wire is higher than that of solid wire due to flux addition. The speed of wire feeding must be higher.

( 3 ) Only for root pass in single-side welding, not for cover pass.

Typical Chemical Composition of Weld Metal (wt%)

C

Si

Mn

P

S

Cr

Ni

Nb

0.03

0.82

1.57

0.020

0.011

19.15

9.32

0.65

Typical Mechanical Properties of Weld Metal

Tensile Strength

N/mm²

Yield Strength

N/mm²

Elongation

%

617

438

40

Size and Polarity (DC-)

Diameter (mm)

2.2

Length (mm)

1000