| Tin
Plating
Color is gray-white in a plated condition. Has very
high luster in fused condition. Soft, but is very
ductile. Corrosion resistance is good. (Coated items
should meet 24 hour 5% salt spray requirement). Solderability
is excellent. Tin is not good for low temperature
applications (changes structure and loses adhesion
when exposed to temperatures below -40º C.) Plate
directly on steel substance (no undercoating for steel
unless otherwise specified).
|
| Spec. |
Thickness |
Comment |
| MIL-T-10727C
|
As
specified on drawing.
Thickness guide (not part of spec.) as follows: |
Alexandria
Metal Finishers provides both bright and matte finishes.
If not specified, bright will be generally provided
Please note: This specification is provided for reference
purposes only as it has been superceded by ASTM-B-545
(See below) and ASTM-B-339 (not available at Alexandria
Metal Finishers).
|
| Type
I |
-------------------------------------- |
Electrodeposited.
Use ASTM-B-545 as guideline. |
|
.0001-.00025" |
Flash
for soldering |
|
.0002-.0004"
|
To
prevent galling and seizing. |
|
.0003
min. |
Where
corrosion resistance is important |
|
.0002-.0006" |
To
prevent formation of case hardening during nitriding. |
| Type
II |
-------------------------------------- |
Hot
dipped (not currently available at Alexandria Metal
Finishers). |
Tin
|
| Spec. |
Thickness |
Comment |
| ASTM-B-545-97e1 |
|
ASTM
requires purchaser to supply information, such as base
metal, underplating, test requirements and test methods
etc. In general, copper alloys containing more than
5% Zn shall have a copper undercoating of at least 0.0001"
or nickel undercoating of at least 0.000050". |
| Class
A |
.0001"
min |
|
| Class
B |
.0002"
min |
|
| Class
C |
.00032"
min |
.0004"
min. for steel. |
| Class
D |
.0006"
min |
.0008"
min. for steel. |
| Class
E |
.0012"
min |
ASTM
requires purchaser to supply information, such as base
metal, underplating, test requirements and test methods
etc. In general, copper alloys containing more than
5% Zn shall have a copper undercoating of at least 0.0001"
or nickel undercoating of at least 0.000050". |
| Type
Matte |
|
| Type
Bright |
|
Type
Flow-
brightened |
------------------------------------- |
Flow
brightening not currently available at
Alexandria Metal Finishers |
