Gold Plating Services per MIL-G-45204, AMS 2422, ASTM B488

Experience: 

With over 30 years of  experience in the gold plating industry...

Here we should talk about industries we are involved in. Briefly mention our projects: 

We are experienced in plating electrical contacts, decorative artworks, satellite and aircraft parts. (Just a little more detail)

Gold Plating Services offers a range of gold plating services. GPS has the ability to underplate with our various nickel solutions as well as copper plating or silver plating if required.

Gold plating is the electro-chemical process of depositing a thin layer of gold on metal.  Gold can be plated directly on a base metal or it can be applied over an undercoating such as nickel to improve adhesion of the gold itself.  The purpose for gold plating includes conductivity, decoration, corrosion protection and reflectivity. 

Gold is often used for conductivity instead of silver because it is a cleaner tarnish free surface.  Gold is also impervious to certain chemicals making it the preferred choice with respect to corrosion protection under special applications.

Gold is plated in thicknesses starting at 0.000007″ which is used for costume jewelry.  Our thickness limit is 0.0001″.  0.00002″-0.00003″ is a commonly used thickness for some wear.  Our gold is alloyed with cobalt and nickel and they are considered a hard gold. Request a quote today.

Talk about what services we offer:

Hard vs Soft?
24K available

 

Specifications:

MIL-G-45204

AMS 2422 

ASTM B488

 

Purity:

Soft Gold up to 99.9% Pure
Hard Gold up to 99.7% Pure

Finish Type:

Substrates Plated On:
Ferrous: All Ferrous Alloys Including Mild Steel, Stainless Steels, Hardened Steels & Tool Steels
Cuprous: All Cuprous Alloys Including Pure Copper, Copper Alloys Including Tellurium & Beryllium, Brass, Nickel-Silver
Aluminum: All Aluminum Alloys Including Wrought, Cast and Proprietary Alloys (MIC-6)
Exotics: Inconel, Pure Nickel (Nickel 200), Cobalt-Chrome (MP35N), Kovar, Monel, Hastalloy, Monel, Lead

 

Part Size Limitations: 

 

Underplates Provided:
Bright Nickel
Bright Acid Copper
Bright Silver NC

Heat Treatments:

Methods:


Gold Plating Specifications

The three most common gold plating services certified by Gold Plating Services are MIL-G-45204, AMS 2422 and ASTM B488.  Our company can provide Type I, II and III gold deposits per these industry standards. A summary of gold plating services to  MIL-G-45204, AMS 2422 and ASTM B488 is provided below:

 

Gold Plating Services to ASTM B488-01:

Type I:  99.7% pure gold with a hardness ranging from A (90 HK25 max) to C (130-200 HK25).
Type II:  99.0% pure gold often referred to as hard gold with a hardness ranging from B (91-129 KH25) to D (> 200 HK25).
Type III:  99.9% pure gold often referred to as soft gold with a hardness of A only (90 HK25 Max).

 

Code:

Code A: 90 HK25 Maximum
Code B:  91-129 HK25
Code C: 130-200 HK25
Code D: > 200 HK25

 

Relationship Between Purity and Hardness

Type                     Code
I                             A, B and C
II                           B, C and D
III                          A Only

Class                     Minimum Thickness [um]
0.25                       0.25
0.50                       0.50
0.75                       0.75
1.0                         1.0
1.25                       1.25
2.5                         2.5
5                            5.0

 

Purity (Type) and Hardness (Grade) relationship:


Purity
                   Hardness
Type I                    A, B or C
Type II                  B, C or D
Type III                 A only

Class 00 – 0.00002 inch thick, minimum
Class 0 – 0.00003 inch thick, minimum
Class 1 – 0.00005 inch thick, minimum
Class 2 – 0.00010 inch thick, minimum
Class 3 – 0.00020 inch thick, minimum
Class 4 – 0.00030 inch thick, minimum
Class 5 – 0.00050 inch thick, minimum
Class 6 – 0.00150 inch thick, minimum

 

Gold Plating Services to MIL-G-45204

Type I – 99.7 percent gold minimum
Type II – 99.0 percent gold minimum
Type III – 99.9 percent gold minimum

Grade A – Knoop hardness 90 max
Grade B – Knoop hardness 91-129, incl.
Grade C – Knoop hardness 130-200, incl.
Grade D – Knoop hardness 201 and over.

If the hardness grade for the gold coating is not specified, Type I shall be furnished at hardness Grade A (90 Knoop max) and Type II shall be furnished at hardness Grade C (130 to 200 Knoop)

Purity (Type) and Hardness (Grade) relationship:


Purity
                   Hardness
Type I                    A, B or C
Type II                  B, C or D
Type III                 A only

Class 00 – 0.00002 inch thick, minimum
Class 0 – 0.00003 inch thick, minimum
Class 1 – 0.00005 inch thick, minimum
Class 2 – 0.00010 inch thick, minimum
Class 3 – 0.00020 inch thick, minimum
Class 4 – 0.00030 inch thick, minimum
Class 5 – 0.00050 inch thick, minimum
Class 6 – 0.00150 inch thick, minimum

 

Appendix:

Give a brief spill about each of the specifications and what each category means based on the specification.