Description & applications
• Tubular wire for self-shielded metal arc hardfacing
• Martensitic alloy used in applications where greater hardness of the weld metal is required up to 500°C
• Outstanding resistance to low stress abrasion with heavy impact and high compressive stresses
APPLICATIONS:
• FCW W O is used for surfacing parts subjected to heavy compressive stresses abrasion or metal-to-metal wear, combined with mechanical and thermal shocks.
• Pre-heat is an essential requirement to prevent hot cracking. The level of preheat is a function of the size and geometry of the component to be hardfaced and its chemical composition. Large build-ups are recommended to be stress-relieved. Avoid excessive build up thickness.
Examples Refurbishing of steel mill rolls, crane wheels, hot work extrusion mandrels, crushing hammers, shear knives, pulleys, and winches
Classification
| EN 14700 |
|---|
| T Fe3 |
Typical weld metal composition (%)
| C | Mn | Si | Cr | Mo | W | Fe |
|---|---|---|---|---|---|---|
| 0.5 | 2.0 | 0.8 | 6.5 | 1.5 | 1.5 | Rest |
All weld metal mechanical properties
| Hardness – 3-Layer deposit on mild steel |
|---|
| 53 -58 HRc |
Shielding gas
| Current type | DC (+) |
|---|---|
| Shielding | Self shielded |
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 | 100-300 | 250 | 21-35 | 28 | 12-25 | 20 |
| 1.6 | 150-300 | 270 | 24-35 | 28 | 15-25 | 25 |
| 2.0 | 200-400 | 300 | 26-35 | 28 | 20-50 | 30 |
| 2.4 | 250-450 | 350 | 26-35 | 28 | 25-50 | 40 |
| 2.8 | 250-450 | 400 | 28-35 | 30 | 25-50 | 40 |
Welding positions
Flat, half up, half down
Packings & Diameters
| Diameters [mm] | 1.2 - 1.6 - 2.0 - 2.4 | 2.4 | 2.4 |
|---|---|---|---|
| Packing(s) | Spool : BS 300 | Coil : B 450 | Drum |
| Weight [Kg] | 15 | 25 | Up to 330 |
| Description | - | - | - |