| Gold
Plating
Yellow
to orange color depending on proprietary process used.
Will range from matte to bright finish depending on
basis metal. Good corrosion resistance, and has high
tarnish resistance. Provides a low contact resistance,
and is a good conductor. Has excellent solderability.
Unless otherwise specified, an intermediate nickel
plate is required on copper base alloys or copper
plated surfaces prior to the gold plating.
|
| Spec. |
Thickness |
Comment |
| MIL-G-45204C |
Unless
otherwise
specified: |
|
| Type
I |
|
99.7%
gold min. |
| Type
II |
|
99.0%
gold min. |
| Type
III |
|
99.9%
gold min. |
| Class
00 |
0.00002"
min. |
Grade
A 90 Knoop max. |
| Class
0 |
0.00003"
min. |
Grade B 91-129 Knoop |
| Class
1 |
0.00005"
min. |
Grade C 130 - 200 Knoop |
| Class
2 |
0.00010"
min. |
Grade D above 200 Knoop |
| Class
3 |
0.00020"
min. |
|
| Class
4 |
0.00030"
min. |
Type
I (Grades A, B or C) |
| Class
5 |
0.00050"
min. |
Type
II (Grade B, C or D) |
| Class
6 |
0.00150"
min. |
Type III (Grade A only) |
| Alexandria
Metal Finishers performs Grade A & Grade C only. Other
Grades quoted upon request. |
ASTM-B-488-01
|
Alternate
gold specification to supercede MIL-G-45204.
Very compatible to MIL-G-45204 except that adhesion
bake test (If Chosen) will be @ 570°F-660°F
for 30 minutes. |
| Type
I |
Purity |
99.7%
gold min. |
| Type
II |
|
99.0%
gold min. |
| Type
III |
|
99.9%
gold min. |
| Code
A |
Hardness |
90
HK (25gr) max |
| Code
B |
|
90-200
HK (25gr) |
| Code
C |
|
130-200
HK(25gr) |
| Code
D |
|
200
min HK(25gr) |
| Class |
Thickness |
Thickness
shall be specified as minimum in micrometers such as
0.25, 0.50, 0.75, 1.00.... |
