Kanthal is a world-leading brand for products and services in the area of industrial heating technology and resistance materials.

Kanthal SW 806 (Spray wire)

Datasheet updated 2013-03-19 13:03:18 (supersedes all previous editions)

Kanthal SW 806 is an austenitic nickel-aluminium alloy (NiAl alloy) for use in arc and flame spray systems. The alloy produces dense, well bonding coatings.

Typical applications for Kanthal SW 806 are bond coats, as protective coatings against high-temperature oxidation, protective coatings against scaling of conventional iron base alloys and as build-up coatings for dimensional restoration.

Chemical composition

Al % Ni %
Nominal composition Bal.
Min 4.5


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 %
1.6 780 850 7

Physical properties

Density g/cm3 8.20
Electrical resistivity at 20°C Ω mm2/m 0.42
Melting point °C 1430
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 (%) 60-70
Hardness HV (300g) 180-250
Surface roughness (µm) 15-28
Porosity (%) 3-7*
Oxides (%) 10-25*

*) 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.

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.

Disclaimer: Recommendations are for guidance only, and the suitability of a material for a specific application can be confirmed only when we know the actual service conditions. Continuous development may necessitate changes in technical data without notice. This datasheet is only valid for Kanthal materials.

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