Alloy 45
Description
With a relatively constant rate of thermal expansion to about 800°F (538°C), low expansion 45 Alloy has been used in thermostats, and its thermal expansion is similar to some alumina ceramics. High permeability 45 Alloy is a 45% nickel-iron alloy capable of exhibiting a high initial permeability and has been used predominantly in the telecommunications industry. National Electronic Alloys does not sell the High Permeability version of 45 Alloy.
Chemical Content(%)
| Ni | Cr | Mn | Si | C | Al | Mg | P | S | Fe |
|---|---|---|---|---|---|---|---|---|---|
| 46 | max 0.10 | max 0.80 | max 0.30 | max 0.05 | max 0.10 | max 0.50 | max 0.025 | max 0.025 | Rem |
TYPICAL TENSILE STRENTGH
| ANNEALED | 1/4 HARD | 1/2 HARD | HARD |
|---|---|---|---|
| 85,000 MAX | 90,000 TO 115,000 | 105,000 TO 125,000 | 120,000 MIN. |
TYPICAL HARDNESS, ROCKWELL B
| ANNEALED | 1/4 HARD | 1/2 HAR |
|---|---|---|
| 70 MAX | 78 TO 83 | 84 TO 88 |
Controlled expansion alloys using compression or eyelet brazed seals Alloy 45 is available in Sheet, Strip and Plate.