Cobalt (Stellite)
FERVEO COB 1 FCW
flux-cored wire (FCW)Catalogue only
AWS class
MF 20-55-CTZ
EN ISO class
T Co3
Hardness
54–56 HRC
Classification
| AWS class | MF 20-55-CTZ |
|---|---|
| EN ISO class | T Co3 |
| DIN 8555 / EN 14700 | MF 20-55-CTZ |
Purpose
- Cobalt-based flux-cored wire, Stellite type 1, 54–56 HRC — the hardest of the standard Stellites — for combined wear, corrosion and thermal shock.
Why it works
Deposits a cobalt-based alloy with an austenitic-ledeburitic structure (Stellite 1 type), the hardest of the standard Stellites. Notable for corrosion resistance — especially to reducing acids — plus extreme wear and temperature shocks. Requires M13 (Ar+1%O2) gas.
Fields of application
- Wear pads, rotary seal rings, pump sleeves, centreless-grinder work rests.
- Bearing surfaces, chemical industry, hot-shear blades, valves.
Chemical composition
| Element | Typical, % |
|---|---|
| C | 2.4 |
| W | 11 |
| Co | balance |
| Cr | 29 |
| Fe | ≤ 3 |
| Mn | 0.4 |
| Si | 0.7 |
Mechanical properties
| Hardness | 54–56 HRC |
|---|
Process
| Polarity | DC+ |
|---|---|
| Shielding gas | M13 (Ar+1%O2) |
| Requires shielding gas | Requires shielding gas |
Sizes and part numbers
| Ø | Current | Voltage | Packaging | Request |
|---|---|---|---|---|
| 1.6 mm | 180–300 A | 26–32 V | 15 kg |
Cross-reference
| Replaces FCH 801 (Magmaweld) | Direct replacement |
Equivalence refers to the classification (AWS / EN ISO), not to product identity. In applications with a qualified procedure (WPS), validate the substitution before use.
Base metals
Wear pads, rotary seal rings, pump sleeves and centerless grinder work rests. Thermal shock resistant; abrasion, erosion, corrosion, cavitation at high temperature; bearing surfaces, chemical industry, hot shear blades, valves
Advantages
- Hardest of the standard Stellites (54–56 HRC).
- Corrosion resistance, especially to reducing acids.
- Resists extreme wear and thermal shock together.
Limitations
- The deposit is machinable only by grinding.
- Needs shielding gas (M13).