| Customization: | Available |
|---|---|
| Product Type: | Wire |
| Material: | Fecral |
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Alcro Wire is a ferritic iron-chromium-aluminum alloy (FeCrAl alloy) for use in arc and flame spray systems. The alloy produces dense, well bonding coatings, resistant to high-temperature oxidation and corrosion.
Typical applications for Alcro wire are bond coats in high-temperature coating systems, protective coatings in high-temperature atmospheres containing sulphur or carbon and protective coatings against scaling of conventional low alloy steels.
| C % | Si % | Mn % | Cr % | Al % | Fe % | |
|---|---|---|---|---|---|---|
| Nominal composition | Bal. | |||||
| Min | - | - | - | 20.5 | 5.3 | |
| Max | 0.08 | 0.7 | 0.4 | 23.5 | 6.3 |
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.
| Wire size | Yield strength | Tensile strength | Elongation |
|---|---|---|---|
| Ø | Rp0.2 | Rm | A |
| mm | MPa | MPa | % |
| 1.6 | 830 | 930 | 5 |
| Density g/cm3 | 7.10 | |
|---|---|---|
| Electrical resistivity at 20°C Ω mm2/m | 1.45 | |
| Melting point | 1500 °C | |
| Magnetic Properties | The material is magnetic up to approximately 600 °C (the Curie point). | |
| Dimension tolerance mm | + 0/-0.05 | |
| Temperature °C | 20 |
|---|---|
| GPa | 220 |
Summary of results obtained when spraying with a conventional Arc Spray gun, using varying spraying parameters.
| Deposition efficiency (%) | 62-78 |
|---|---|
| Hardness HV (300g) | 165-280 |
| Surface roughness (µm) | 11-16 |
| Porosity (%) | 1-6* |
| Oxides (%) | 5-20* |
*) These results are obtained when using air as spraying gas. Also nitrogen has been used, resulting in lower rates of porosity and oxides.
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.
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