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PAN MALAYSIA ELECTRO PLATING SDN BHD

Electroless Nickel (Mid / High Phosphorous)

Nickel symbol_page-0001

Electroless Nickel plating (ENP) is just as durable and corrosion resistant but has a nickel-phosphorus coating that leaves a glossier finish and sturdy texture. This process is completed without the electric current that is commonly used in electroplating.


ENP is used to provide uniform coatings on complex shapes, to improve wear and/or corrosion resistance, and/or to improve solderability on or for selected material. It is suitable for temperatures up to 1,000°F, although wear and corrosion resistance may degrade as temperatures increase.


We provide ENP service for most construction, electronics, engineering, oil & gas industries per MIL-C-26074 and ASTM B733 ~ the most widely recognized and long-standing specifications pertaining to Electroless Nickel plating.

Electroless Nickel Plating Specifications

MIL-C-26074

Classification
Class 1: Except for hydrogen embrittlement relief, no post plating thermal treatment.
Class 2: Thermal treatment at 450F (232C) or above to harden the deposit.
Class 3: Thermal treatment at 375F (191C) to improve adhesion for nonheat treatable aluminum alloys and beryllium alloys.
Class 4: Thermal treatment at 250F (121C) to improve adhesion for heat treatable aluminum alloys.
Grade
Grade A: .001” Minimum Thickness
Grade B: .0005” Minimum Thickness
Grade C: .0015 Minimum Thickness

ASTM B733

Type
Type I:  No requirement of      Phosphorous    
Type II: 1-3% phosphorous (low Phosphorous) 
Type III: 2-4% phosphorous (low Phosphorous)  
Type IV: 5-9% Phosphorus
Type V: 10% and above Phosphorus 

Service Condition
SCO: Minimum thickness .000004” (0.1 um)
SC1: Light Service .0002” (5 um)
SC2: Mild Service .0005” (13um)
SC3: Moderate Service .001” (25 um)
SC4: Severe Service .003” (75 um)

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.

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