HFK 409Nb-G is a valve sealing surface flux-cored wire for hardfacing. It has good wear and corrosion resistance as well as excellent thermal shock resistance.

Typical applications

Flux cored wire for mid-temperature high pressure valve surface sealing.

Chemical composition of deposited metal (%)


Mechanical properties

LayersHardness (HRC)
All weld metal45-47

Recommended welding parameters

Diameter: in (mm)Current (A)Voltage (V)
116 (1.6)200–28022–28
Shielding gasGas flow: cfh (l/min)Torch angleStick out: in (mm)
CO240 (20)80°1234 (15–20)

Diameters and packaging

Diameter: in (mm)Packaging: lb (kg)
116 (1.6)33 (15)
Click here to download the datasheet for Kooben HFK 409Nb-G.