Kanthal® SW 782 is an austenitic iron-nickel alloy (FeNi alloy) alloy for use in arc and flame spray systems. The alloy has low resistivity and a high-temperature coefficient of resistance.
Typical applications for Kanthal® SW 782 are mould coatings in the glass industry or build-up coatings for dimensional restoration.
Chemical composition
| Ni % | Fe % | |
|---|---|---|
| Nominal composition | 52.0 | Bal. |
Machining
Depending of surface finish requirements, the coating may be machined by turning or grinding. For rougher surface, turning using carbide tools, light cuts and efficient cooling to avoid overheating is recommended. Grinding in fine steps using cooling, light pressure and clean wheels gives smoother finish.
Mechanical properties
| Wire size | Yield strength | Tensile strength | Elongation |
|---|---|---|---|
| Ø | Rp0.2 | Rm | A |
| mm | MPa | MPa | % |
| 1.6 | 670 | 730 | 7 |
Physical properties
| Density g/cm3 | 8.20 | |
|---|---|---|
| Electrical resistivity at 20°C Ω mm2/m | 0.37 | |
| Melting point °C | 1435 | |
| Magnetic Properties | Magnetic up to approx. 530 °C (Curie point) | |
| Dimension tolerance mm | + 0/-0.05 | |
Typical coating properties
Summary of results obtained when spraying with a conventional Arc Spray gun, using varying spraying parameters.
| Deposition efficiency (%) | 65-78 |
|---|---|
| Hardness HV (300g) | 130-215 |
| Surface roughness (µm) | 7-13 |
| Porosity (%) | 1-5* |
| Oxides (%) | 15-22* |
*) These results are obtained when using air as spraying gas. Also nitrogen has been used, resulting in lower rates of porosity and oxides.
Safety
Personnel working with thermal spraying should be aware of the hazards connected to the process. They should be familiar with the use of equipment regarding, i.e. eye, skin, hearing and respiratory protection.
Personnel should be familiar with safety regulations regarding the complete process, including spraying and th spray equipment used. This product contains elements, which in certain combinations may be dangerous to your health. Material Safety Data Sheets are provided by Kanthal for this product, and should be read and understood before using the material.
Not following these instructions may danger your health.