Characteristics
This electrode is easy to use on AC or DC positive polarity. Bead appearance is good, and deposits are non-heat treatable. Hardness is maintained at elevated temperatures. ISOARC 438 restrikes well. The self releasing slag should be removed after each pass.
Applications
ISOARC 438 is used extensively in the mining, earthmoving, crusher and mineral industries. All parts subject to high wear due to abrasive environments are protected by ISOARC 438
Procedures
Keep the arc short and hold it at approximately 70 degrees to the work piece. Keep deposits to a maximum of three layers. Use ISOARC 168 as a buffer if additional layers are required. Do not weave more than three times the diameter of the electrode.
Structure
Hypereutectic, with chromium hexagonal primary carbides in an Austenitic matrix.
| Classifications | |
|---|---|
| AWS | EFeCr-A1 |
| PRODUCT | ISOARC 438 |
| Mechanical Properties | |
| COMPOSITION | Copper and Chromium |
| HARDNESS | >RC 60 + after second layer. Hardness depends on amperage settings and base metal dilution |
| Chemical Analysis | |
|---|---|
| Carbon | 3.5-4.5 |
| Manganese | 4.0-6.0 |
| Silicone | 0.5-2.0 |
| Chromium | 20.0-25.0 |
| Molybdenum | <0.5 |
| Diameter | Length | Current | Pack Mass | Item No |
|---|---|---|---|---|
| 3.2 | 350mm | 130 – 150A | 4kg | EL43832 |
| 4.0 | 350mm | 160 – 180A | 4kg | EL43840 |
| 5.0 | 350mm | 170 – 220A | 4kg | EL43850 |
Welding Positions
