|
LOW phosphorus electroless nickel |
MEDIUM phosphorus electroless nickel |
HIGH phosphorus electroless nickel |
|
without heat treatment |
+ hardening HT (290°C) |
without heat treatment |
+ diffusion HT (610°C) |
Up to 1000 in SS |
Corrosion protection
For a
thickness >40 µ* |
200 hours in salt spray |
200 hours in SS |
200 hours in SS |
Up to 1000 hours in SS |
Up to 1000 in SS |
| Pour information: zingage chromaté jaune < 100 h au B.S |
| Hardness |
700 to 750 Hv |
850 Hv (= 65 Hrc) |
500 to 550 Hv (Vickers) |
550 to 600 Hv |
650 to 750 HV |
| Electrical resistivity |
> 30 - 50 µohm-cm |
Decreases with HT > 260°C |
70 - 110 µohm/cm |
Decreases with HT > 260oC |
> 110 µohm/cm |
| Magnetic properties |
Slightly magnetic |
Slightly magnetic |
Slightly magnetic |
Slightly magnetic |
Non-magnetic.Become slightly magnetic after HT >260°C |
| Appearance |
Glossy or satin, depending on roughness |
Slightly copper coloured |
Glossy or satin, depending on roughness |
Marbled green |
Glossy or satin, depending on Ra |
| Thickness of deposit |
From 3 to 100 µ (greater thickness on request) |
| Adaptability |
All parts, even with very complex shapes: complete or partial protection |
| Maximum part dimension |
2000 x 1000 x 900 mm |
| Grade of base |
All types of metal: carbon and stainless steel, aluminium and its alloys, copper and its alloys, cast iron. |
| Friction coefficient |
Reduction of 30% (comparison established between steel/steel and electroless nickel/steel) |
| Regularity of thickness |
Excellent (to within a micron) |
| Adhesion of plating |
Excellent: comparable at all points to electrolytic plating. Tests according to ISO 4527 et ISO 2819 |
| Roughness |
Does not modify initial roughness (Ra) of base |
| Weldability |
Brazing of silver or lead tin: good / Arc or torch welding: not advisable |
| Density |
7.8-8.1 gr / cm3 |
| Melting point |
860-880oC to 1050°C (low phosphorus) |
| Thermal conductivity |
Good thermal barrier: 0.0105 to 0.0135 Cal / cm / sec / °C |
