General Description
Alloy 42-6 (ASTM F31 Alloy) is a iron nickel alloy with 6% chromium, it is used primarily for glass sealing applications in electronic devices.
ASTM F31 alloy develops a tight green oxide film during wet hydrogen annealing and finds applications in relatively large glass seals and vacuum tight windows.
Chemical Composition
| Grade | C% | P% | S% | Mn% | Si% | Al% | Cr% | Ni% | Fe% |
|---|---|---|---|---|---|---|---|---|---|
| Alloy 42-6 | Max 0.05 | Max 0.02 | Max 0.02 | Max 0.25 | Max 0.30 | Max 0.20 | 5.40-6.30 | 41.5-42.5 | Bal. |
Designations
UNS K94760
Specifications
ASTM F31
Wire, Strip, Bar, thin wall tube are available
Physical Properties
Density： 8.15 g/cm3
Melting Point: 1430 °C
Mechanical Properties
σb/MPa |
σP0.2/MPa |
δ/% |
HV | |
| Annealed | Min 500 | Min 177 | Min 33 | Max 128 |
Linear Coefficient of Thermal Expansion ā,10-6/℃
| Grade | 20-100℃ | 20-200℃ | 20-300℃ | 20-400℃ | 20-500℃ | 20-550℃ | 20-600℃ |
|---|---|---|---|---|---|---|---|
| Alloy 42-6 | 6.8 | 7.0 | 7.7 | 9.7 | 11.7 | 11.7 | 12.2 |