Kanthal® SW 230 is an austenitic iron-nickel-chromium alloy (FeNiCr alloy) for use in arc and flame spray systems. The alloy produces dense, well bonding coatings resistant to high-temperature oxidation.
Typical applications for Kanthal® SW 230 are protective coatings against corrosive gases, protection against scaling of conventional low alloy steels and build-up coatings for dimensional restoration.
Chemical composition
| C % | Si % | Mn % | Cr % | Ni % | Fe % | |
|---|---|---|---|---|---|---|
| Nominal composition | Bal. | |||||
| Min | - | 1.6 | - | 18.0 | 34 | - |
| Max | 0.10 | 2.5 | 1.0 | 21.0 | 37 | - |
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 | 860 | 950 | 6 |
Physical properties
| Density g/cm3 | 7.90 | |
|---|---|---|
| Electrical resistivity at 20°C Ω mm2/m | 1.04 | |
| Melting point °C | 1390 | |
| Magnetic Properties | Non magnetic | |
| 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 (%) | 60-75 |
|---|---|
| Hardness HV (300g) | 160-240 |
| Surface roughness (µm) | 10-15 |
| Porosity (%) | 2-5 |
| Oxides (%) | 10-20 |
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 the 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.