Hardfacing Electrodes
ES 250 / EN 14700: E Fe 1
Description
ES 250 Basic types , thick, has an electrode covered. The weld metal yield is approximately 110%.High abrasion resistance, sealing is good. Will not crack and pore, hot and cold can be hammered. Machinable weld seam. Moisture taken before using electrodes must be dried for 2 hours to 300 o C . ES 250 Use for Rails, rail scissors, toothed wheels, driving wheels, sprockets, carrier rollers, shafts, transmission parts, clutch, etc.. fillet welds are used as wear-resistant parts.
Typical Chemical Composition (%)
| Si | Mn | Cr | C |
|---|---|---|---|
| 0.90 | 1.0 | 1.0 | 0.15 |
Typical Mechanical Properties
| Yeild Strength | Tensile Strength | Elongation 5x D | Impact (ISO-V) |
|---|---|---|---|
Applications
Weldable by size from 100 to 200 ?C is recommended preheating. Welding process, the electrode should be done keeping upright and an arc length short. High current intensity should not be selected, it should be noted, especially in less-pass filler. The hardness of the weld metal to the workpiece, changes depending on the cooling rate and the number of passes is gösater. Their hardness of the electrode can be fully from the third pass.
Sizes Available & Recomennded Currents
| Diam. (mm) | Length (mm) | Current (Amperes) | Arc Voltage | Wire Feed |
|---|---|---|---|---|
| 3.25 | 350 | 110 - 140 | ||
| 4.0 | 450 | 450 - 180 | ||
| 5.0 | 450 | 180 - 230 |
Welding Current
DC { + } ???
Welding Positions
 Flat |
 Horizontal |
* |  Overhead |
Hardness (HB)
240 - 280 HB