| Silver
Plating
White
matte to very bright in appearance. Good corrosion
resistance, depending on base metal. Will tarnish
easily. Hardness varies from about 90 Brinnell to
about 135 Brinnell depending on process and plating
conditions. Solderability is excellent, but decreases
with age. Best electrical conductor. Has excellent
lubricity and smear characteristics for anti galling
uses on static seals, bushing, etc.
|
| Spec. |
Thickness |
Comment |
| QQ-S-365D |
|
|
| |
0.0005"
min. unless otherwise specified |
Increasing
use in both decorative and engineering fields, including
electrical and electronic fields. |
| Type
I |
|
Matte. |
| Type
II |
Semi-bright |
| Type
III |
Bright |
| Grade
A |
Chromate
post treatment to improve tarnish resistance |
| Grade
B |
No
chromate treatment. |
*
Please note: This specification is provided for reference
only, as it has been cancelled.
Users may consult ASTM-B700 |
This
specification covers requirements for electrodeposited
coatings of silver used for engineering
purposes that may be matte, bright, or semibright and
are not less than 98% silver purity. |
| Spec. |
Thickness |
Comment |
| ASTM-B-700-97
(2002) |
|
|
| Type
I |
----------------------
|
99.9%
min |
| Type
II |
----------------------
|
99.0%
min |
| Type
III |
----------------------
|
98.0%
min |
| Grade
A |
As
Specified
(Ref Table 3.1) |
Matte |
| Grade
B |
Bright |
| Grade
C |
Bright
(obtained by polishing of Grade A) |
| Grade
D |
Semibright |
| Class
N |
No
supplementary tarnish resist (chromate) treatment. |
| Class
S |
With
supplementary tarnish resist (chromate) treatment (not
suitable for food service applications). |
