| Physical Properties |
|
| Specific gravity |
8.12 |
| Density, lbs. per cu. in. |
0.293 |
| Electrical resistivity, micro-ohm-cm
|
72 |
| ANNEALED |
85,000
MAX |
| 1/4
HARD |
90,000
TO 115,000 |
| 1/2
HARD |
105,000
TO 125,000 |
| HARD |
120,000
MIN. |
|
TYPICAL
HARDNESS, ROCKWELL B
|
| ANNEALED |
70
MAX |
| 1/4
HARD |
78
to 83 |
| 1/2
HARD |
84
to 88 |
|
Element
|
Percent
by Weight
|
| NICKEL(NI) |
39/41% |
| CHROMIUM(CR) |
0.05 |
| MANGANESE(MN) |
0.60 |
| SILICON(SI) |
0.02 |
| CARBON(C) |
0.05 |
| COBALT(CO) |
0.05 |
| PHOSPHORUS(P) |
0.02 |
| SULFUR(S) |
0.02 |
| IRON(FE) |
REMAINDER |
|
Note: Nickel varies to achieve
the proper thermal expansion.
|
|
TYPICAL
LINEAR COEFFICIENT OF THERMAL
|
|
EXPANSION
|
|
(cm
per cm C x 10-6)
|
| 30
to 100 |
4.8 |
| 30
to 200 |
4.5
|
| 30
to
300 |
4.5
|
| 30
to
350 |
5.0
|
| 30
to
400 |
6.0
|
| 30
to
425 |
N/A
|
| 30
to
450 |
7.0
|
| 30
to
500 |
8.0
|
| 30
to
550 |
8.8
|
| 30
to
600 |
9.5
|
| 30
to
700 |
10.5
|
| 30
to
800 |
11.4
|
| 30
to
900 |
12.3
|
| 30
to
1000 |
13.2
|
|
OTHER
SIZES AVAILABLE UPON REQUEST
|
| 42 alloy is a less expensive alternative to
Kovar when a high integrity seal is not necessary.
Normally sealed as a compression seal using leaded
glass. |
[TOP]
|
|
|
|
