MIL-DTL-45204 Gold Plating
WHAT IS MIL-DTL-45204?
Accurate Precision Plating offers precision MIL-DTL-45204 gold plating. Plating gold to this military-grade specification ensures that the final product meets strict purity, thickness, and hardness standards and requirements for the U.S. Department of Defense and its various agencies.
With MIL-DTL-45204 plating, there are several properties that are associated with the part finish, including the purity and hardness of the gold
MIL-DTL-45204 classifies the gold type based on material purity.
|
Type |
Purity |
|
Type I (Hard Gold) |
Minimum of 99.7 percent gold |
|
Type II (Hard Gold) |
Minimum of 99.0 percent gold |
|
Type III (Soft Gold) |
Minimum of 99.9 percent gold |
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).
The four grades of material hardness grades are based on the Knoop scale.
|
Grade |
Hardness |
|
Grade A |
90 Knoop max |
|
Grade B |
91–129 Knoop |
|
Grade C |
130–200 Knoop |
|
Grade D |
201 Knoop and over |
Because more impurity results in higher hardness values, the following are acceptable purity-hardness combinations per MIL-DTL-45204 specifications.
|
Type |
Hardness Grades |
|
Type I |
Grades A, B, or C |
|
Type II |
Grades B, C, or D |
|
Type III |
Grade A only |
MIL-DTL-45204 plating specifications also include eight thickness classes that correspond to an acceptable minimum thickness.
|
MIL-DTL-45204 PLATING THICKNESS CLASSES |
|
|
Class |
Minimum Thickness |
|
Class 00 |
0.00002 inch |
|
Class 0 |
0.00003 inch |
|
Class 1 |
0.00005 inch |
|
Class 2 |
0.00010 inch |
|
Class 3 |
0.00020 inch |
|
Class 4 |
0.00030 inch |
|
Class 5 |
0.00050 inch |
|
Class 6 |
0.00150 inch |
Silver or copper plus silver may not be used as an underplate. When applying gold plating to a copper-rich surface such as brass, copper, bronze, or beryllium copper, an anti-diffusion underplate such as nickel is recommended.
Accurate Precision Plating provides MIL-DTL-45204 plating and metal surface finishing services to a wide range of industries, including aerospace, military and defense, telecommunication, oil and gas, pharmaceutical, home electronics, and advanced technology. MIL-DTL-45204 can be plated on all ferrous, cuprous, and aluminum alloys as well as various exotic metals, such as Monel® and Inconel®.
Our certified MIL-DTL-45204 gold plating services adhere to all industry and regulatory standards, and all our processes are certified to ISO 9001:2015. With 50 years of experience, we are capable of precision plating thickness to exact tolerances. We offer precision barrel and rack copper plating services from short run to full production runs with fast turnaround times (most products delivered within 3-5 business days).
If you have any questions regarding Accurate Precision Plating’s gold plating standards and certifications, contact us today.
Request a quote if you are looking for gold plating MIL-DTL-45204 services.
Contact Accurate Precision Plating
click to request a quote or call us at 866.598.8063