Hardfacing
FERVEO HRF 300 R
covered electrode · stick electrodeCatalogue only
AWS class
E 1-UM-300
EN ISO class
E Fe 1
Hardness
300 HB
Classification
| AWS class | E 1-UM-300 |
|---|---|
| EN ISO class | E Fe 1 |
| DIN 8555 / EN 14700 | E1-UM-300 |
Purpose
- Medium-hardness (300 HB) surfacing electrode for Mn-Mo rail points and crossings, same family as FERVEO HRF 300.
- Can be welded with an AC transformer, not just DC equipment.
Why it works
Same principle as HRF 300 — tough, machinable basic deposit — but formulated to strike and hold the arc on alternating current too, useful in shops with only an AC transformer.
Fields of application
- Surfacing Mn-Mo-alloyed rail points and crossings, with deposit mechanical strength ≥880 N/mm².
- Shops with AC welding equipment (transformer).
Chemical composition
| Element | Typical, % |
|---|---|
| C | 0.14 |
| Cr | 1.8 |
| Mn | 0.5 |
| Si | 0.5 |
Mechanical properties
| Hardness | 300 HB |
|---|
Process
| Polarity | DC+/AC |
|---|---|
| Re-drying | 300°C / 2h |
Sizes and part numbers
| Ø | Length | Current | Request |
|---|---|---|---|
| 3.2 mm | 350 mm | 90–135 A | |
| 4 mm | 450 mm | 135–180 A |
Cross-reference
| Replaces EH 330 (Magmaweld) | Direct replacement |
| Replaces AS SD-300 (Askaynak) | 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.
Advantages
- Weldable on DC+ or AC — flexible depending on available equipment.
- Machinable deposit, same profile as HRF 300.
- Deposit mechanical strength ≥880 N/mm² — suited to tough joints under dynamic load.
Limitations
- Pre-heat 250-350°C before welding per the manufacturer's recommendation for this variant; re-dry at 300°C/2h if the electrode has absorbed moisture.