Electroless Nickel Plating

Definition:
Electroless Nickel Plating is an auto-catalytic chemical technique used to deposit a layer of nickel-phosphorus without an external current. This process produces coatings of uniform thickness which is beneficial when plating irregularly shaped objects, holes, recesses, internal surfaces, valves or threaded holes. Electroless nickel is more corrosion resistant then traditional electrolytic nickel.

Spec(s):
Mil-C-26074

Classification(s):
Class 1 – as plated with no subsequent heat treatment
Class 2 – Heat treated to achieve required hardness
Class 3 – Aluminum alloys non heat treatable, beryllium alloys processed to improve adhesion of the nickel deposit
Class 4 – Aluminum alloys heat treatable, processed to improve adhesion of the nickel deposit

Grade A – 0.0010 inch minimum deposit thickness
Grade B – 0.0005 inch minimum deposit thickness
Grade C – 0.0015 inch minimum deposit thickness

Spec(s):
ASTM B733-04

Classification(s):
Type I – no requirement of phosphorus
Type IV – 5-9% phosphorus (medium)

JMD uses a medium phosphorus content electroless nickel to obtain a bright appearance, while remaining magnetic and retaining good solder-ability and moderate corrosion resistance

SC0 – Minimum thickness 0.000004″
SC1 – Light Service 0.0002″ minimum
SC2 – Mild Service 0.0005″ minimum
SC3 – Moderate Service 0.001″ minimum
SC4 – Severe Service 0.003″ minimum

Class 1 – As deposited no heat treatment
Class 2 – Heat treatment at 250* to 400* C to produce a minimum hardness of 850 HK100
Class 3 – Heat treatment at 180* to 200* C for 2 to 4 hours to improve coating adhesion and to provide hydrogen embrittlement relief
Class 4 – Heat treatment at 120* to 130* C for at least 1 hour of heat treatable (age-hardened) aluminum alloys and carburized steel to increase adhesion
Class 5 – Heat treatment at 140* to 150* C for non age-hardened aluminum alloys and beryllium to improve coating adhesion
Class 6 – Heat treatment at 300 to 320°C (572-608°F) for at least 1-hr to improve coating adhesion for titanium alloys.

Spec(s):
AMS-2404 (supersedes AMS-Mil-26074)

Classification(s):
Class 1: As-deposited, no heat treatment.
Class 2: Heat treatment at 260 to 400°C (500-752°F) to produce a minimum hardness of 850 HK100.
Class 3: Heat treatment at 180 to 200°C (356-392°F) for 2 to 4-hr to improve coating adhesion on steel and to provide for hydrogen embrittlement relief.
Class 4: Heat treatment at 120 to 130°C (248-266°F) for at least 1-hr to increase adhesion of heat-treatable (age-hardened) aluminum alloys (such as 7075) and carburized steel.
Class 5: Heat treatment at 140 to 150°C (284-302°F) for at least 1-hr to improve coating adhesion for aluminum, non age-hardened aluminum alloys, copper, copper alloys and beryllium.
Class 6: Heat treatment at 300 to 320°C (572-608°F) for at least 1-hr to improve coating adhesion for titanium alloys

Grade A – 0.0010-inch minimum deposit thickness
Grade B – 0.0005-inch minimum deposit thickness
Grade C – 0.0015-inch minimum deposit thickness

Available Process(es):
Hand-line

Note:
JMD electroless nickel is RoHS compliant.
JMD can provide corrosion testing according to ASTM B117 per request.