Heat-resistant Cr-Mo steels
FERVEO CMO 12WV MIG
solid wireCatalogue only
also as: TIG rod
AWS class
EN ISO 21952-A G CrMoWV12Si
EN ISO class
G/W CrMoWV12Si
Tensile strength (Rm)
700 MPa
Classification
| AWS class | EN ISO 21952-A G CrMoWV12Si |
|---|---|
| EN ISO class | G/W CrMoWV12Si |
Purpose
- Solid 12% Cr martensitic steel wire (11% Cr–1% Mo–V–W, EN ISO G/W CrMoWV12Si) — joining and surfacing of turbine parts in 12Cr steel (X20CrMoV12-1 and equivalents), resistant to hot scaling up to 600°C.
Why it works
At 11% chromium, this alloy belongs to the 12Cr martensitic steel family used for turbines (rotors, blades, casings) — a different family from the 9Cr-1Mo boiler ladder (FERVEO CMO 9/91), built for both joining and surfacing worn turbine parts.
Fields of application
- Joining and surfacing of turbine rotors, blades, and casings in 12Cr martensitic steel (X20CrMoV12-1 and equivalents).
Chemical composition
| Element | Typical, % |
|---|---|
| C | 0.2 |
| V | 0.3 |
| W | 0.5 |
| Cr | 11 |
| Mn | 0.6 |
| Mo | 1 |
| Ni | 0.4 |
| Si | 0.3 |
Mechanical properties
| Tensile strength (Rm) | 700 MPa |
|---|---|
| Elongation (A5) | 15 % |
| Impact energy (KV) | 35 J |
Process
| Polarity | DC+ |
|---|---|
| Shielding gas | M1,M2 |
Sizes and part numbers
| Ø | Request |
|---|---|
| 0.8 mm | |
| 1 mm | |
| 1.2 mm | |
| 1.6 mm |
Supply programme
spools D100 / D200 / K200 / K300
Base metals
1.49221.4937
Advantages
- Suited to both joining and surfacing worn turbine parts — not just fabrication welding.
- Alloy specific to 12Cr martensitic steel — distinct from the 9Cr-1Mo boiler ladder (FERVEO CMO 9/91), not a generic substitute.
Limitations
- Not interchangeable with the 9Cr-1Mo boiler-ladder grades (FERVEO CMO 9/91) — different steel families despite the similar service temperature.