Thermanit 22/09 is a high alloyed TIG rod for duplex steels. It goes into tanks, pipelines and chemical or marine structures that need strength and corrosion resistance at the same time.
TIG gives you full control over the heat input and a clean, smooth weld. The rod also serves for cladding carbon steel surfaces and runs well on robot and mechanised stations.
Do not quench the joint with water or force the cooling, too fast a cooling rate leaves too much ferrite in the weld. Protect the root when you weld from one side, an oxidised underside spoils the corrosion resistance.
Manufacturer datasheet
Chemical composition and properties from the manufacturer datasheet
Typical weld metal values from the voestalpine Böhler Welding data sheet, issue 07/2025. The minimum or the range guaranteed by the maker is given in brackets. The figures depend on the heat treatment condition and the shielding gas stated in the row and do not replace testing the joint to your own WPS.
Chemical composition, wt.-%
C
Si
Mn
Cr
Ni
Mo
N
FN
0,02
0,4
1,7
22,5
8,8
3,2
0,15
46
Welding data and approvals
Polarity
direct current, electrode negative (DC-)
Shielding gas to EN ISO 14175
I1
Approvals
TÜV (03343), DB (43.132.97 ), ABS, DNV, LR, NAKS, CE
Datasheet edition
07/2025
Fits
For which materials and machines
Base materials
Material group: duplex. The exact grades and thicknesses are in the manufacturer data sheet, and for an unusual joint call us, we will pick the filler metal.
Process and machines
TIG rod, works on any sound machine for this process: welders. Shielding gas: I1: 100 % argon.
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