KT Group Members

Applications and Features

( 1 ) KMS-718 is 52%Ni-18%Fe-19%Cr-5%Nb-3%Mo-1%Ti alloy.

( 2 ) High tensile strength and ductility at 700℃, and good resistance to stress corrosion crack.

( 3 ) Suitable for welding Inconel alloys 718, 706 and X-750.

( 4 ) Ideal for welding aircraft high strength components and liquid rocket components exposed to cryogenic temperatures.

Welding Position

Welding Instruction

( 1 ) Clean surface of base metal before welding.

( 2 ) Heat input should be controlled as low as possible.  

( 3 ) For other instructions, please refer to Appendix B.

Typical Chemical Composition of Wire (wt%)

C

Si

Mn

P

S

Cr

Mo

Ti

Al

Fe

Nb

Ni

0.04

0.05

0.06

0.004

0.001

17.36

3.03

1.01

0.44

20.00

5.30

52.50

Typical Mechanical Properties of Weld Metal    

Tensile Strength

N/mm²

Yield Strength

N/mm²

Elongation

%

Charpy V-Notch

^oC

J

1220

1055

12

-

-

Size and Suggested Operating Range (DC+)

Diameter (mm)

0.8

0.9

1.2

1.6

Current (A)

140~180

160~200

190~230

200~250

Voltage (V)

24~27

25~28

26~30

29~33