FCW 21-G
Hardfacing Cobalt base
Description & applications
• Cobalt base cored wire for gas shielded metal arc hardfacing • Co-Ci-Ni-Mo alloy deposit
• Excellent metal-to-metal wear resistance combined good corrosion resistance
APPLICATIONS
FCW 21-G is used for hardsurfacing parts subjected to a combination of impact, abrasion, compression, corrosion and high temperatures up to 900°C The toughness of the deposit allows excellent resistance to thermal cycles and shocks Less crack sensitive than other cobalt base alloys, FCW 21-G is used for building up large-scale sections
Used for integral seats and guides of large water and high-pressure valve bodies, drop forging dies, pump shafts and sleeves, hot punches etc.
Classification
| EN 14700 | AWS A 5.21 |
|---|---|
| T Co1 | ERCCoCr-C |
Typical weld metal composition (%)
| C | Mn | Si | Cr | Ni | Mo | Fe | Co |
|---|---|---|---|---|---|---|---|
| 0.25 | 1.0 | 1.0 | 28.5 | 3.0 | 5.5 | 4.0 | Bal. |
All weld metal mechanical properties
| Hardness - As welded | Hardness - Work hardened |
|---|---|
| 33 HRC | 47 HRC |
Shielding gas
| Current type | DC+ or pulsed |
|---|---|
| EN 439 / ISO 14175 | I1 (argon), M13 (Ar+1à 2 % O2) |
| Gas flow rate | 10 - 20 l/min |
Operating conditions
| Diameter [mm] | Amperage [A] - Range | Amperage [A] - Optimum | Voltage [V] - Range | Voltage [V] - Optimum | Stick-out [mm] - Range | Stick-out [mm] - Optimum |
|---|---|---|---|---|---|---|
| 1.2 | 100-250 | 200 | 16-29 | 28 | 15-30 | 10-25 |
| 1.6 | 140-350 | 250 | 16-30 | 28 | 15-30 | 10-25 |
Welding positions
Flat, half up, half down
Packings & Diameters
| Diameters [mm] | ≤ 2.4 mm | ≥ 2.4 mm | ≥ 2.4 mm |
|---|---|---|---|
| Packing(s) | Spool : BS 300 | Coil : B 450 | Drum |
| Weight [Kg] | 15 | 25 | Up to 330 |
| Description | - | - | - |