Kanthal® SW 821 is an austenitic copper-nickel alloy (CuNi alloy) for use in arc and flame spray systems. The alloy produces dense, well bonding coatings which are resistant against corrosion.
Kanthal® SW 821 is typically used in marine applications for and in certain chemical applications.
Chemical composition
| Ni % | Si % | Mn % | Fe % | Cu % | |
|---|---|---|---|---|---|
| Nominal composition | Bal. | ||||
| Min | 63 | - | - | ||
| Max | 0.5 | 1.25 | 2.50 |
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 | 577 | 626 | 8 |
Physical properties
| Density g/cm3 | 8.8 | |
|---|---|---|
| Melting point °C | 1350 | |
| Magnetic Properties | The material is slightly magnetic at room temperature | |
| Dimension tolerance mm | + 0/-0.05 | |
| Temperature °C | 20 |
|---|---|
| GPa | 178 |
Typical coating properties
Properly sprayed the wire produces dense, well bonding coatings for oxidation and corrosion protection.
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.