|
Request
for Quotation
| AVAILABILITY |
|
Binary alloy with low
thermal expansion coefficient.
Used on:
Leadframes for integrated
circuits, thermostatic bi-metal strips and glass to metal seals. |
NOMINAL DATA SHEET
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Alloy 42 Physical Properties
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| Specific gravity |
8.12 |
| Density, lbs. per cu. in. |
0.293 |
| Electrical resistivity,
micro-ohm-cm |
72 |
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Typical Tensile
Strength
(1,000 PSI)
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| Annealed |
85,000 Max. |
| 1/4 Hard |
90,000 to 115,000 |
| 1/2 Hard |
105,000 to 125,000 |
| Hard |
120,000 Min. |
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Typical Hardness,
Rockwell B
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Annealed
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70 Max.
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1/4 Hard
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78 to 83
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1/2 Hard
|
84 to 88
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| NICKEL (NI) |
39/41% |
| CHROMIUM (CR) |
0.05 |
| MANGANESE (MN) |
0.60 |
| SILICON (SI) |
0.02 |
| CARBON (C) |
0.05 |
| ALUMINUM (AL) |
0.02 |
| COBALT (CO) |
0.05 |
| PHOSPHORUS (P) |
0.02 |
| SULFUR (S) |
0.02 |
| IRON (FE) |
REMAINDER |
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Note:
Nickel varies to achieve the proper thermal expansion.
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ALLOY
42 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.
42 alloy is
normally sealed as a compression seal
using leaded glass.
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Disclaimer
Every
effort is made to ensure that technical specifications are accurate.
However, technical specifications included herein should be used as a
guideline only. All specifications are subject to change without notice.
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