Electroless nickel

Properties:

Electroless nickel is a nickel phosphorus alloy commonly divided into low-phosphorus (high abrasion resistance), medium-phosphorus (soldering and electronics), and high-phosphorus (high corrosion protection). 

Plated electroless nickel has a hardness of 450 HV₁₀₀. After being heat treated to 250^oC the hardness increases to 650 HV₁₀₀. 

Appearance:

Light, matte, or shiny surface similar to stainless steel.

Thickness of layer:     

5 - 50 µm with the possibility of higher coating thickness.

Uniform thickness of nickel coating on the parts both inside and outside. Plating tolerance ±10 % of coating thickness.

Base material:

Electroless nickel may be plated on steel, stainless steel, cast iron, copper, brass, aluminium, and sintered parts.

Application:

Fittings, valves, hydraulic components, electric motor parts, transmission and pump parts, sprocket wheels, wearing parts on packing machines and electronic and medicinal equipment. May be partially plated on e.g. bearing surfaces. 

References:

ISO 4527