A binary nickel-iron containing around 41% nickel, this grade exhibits a low and normally consistent coefficient of thermal expansion over the range 20-300oC. This enables its use in glass-to-metal or ceramic-to-metal sealing applications and in tooling for aerospace composites. Invar 42 also has a coefficient of thermal expansion matched to silicon, and ceramic materials such as alumina, beryllia, and vitreous glass compounds. It can be found as a sealing material in semiconductor packages, electronic tubes, CRT electron guns, microelectronic components, thermostat rods, vacuum devices, and electric industrial lamps.
Product Description
| Grade | 1.3917 / UNS K94100 |
| Specification | ASTM F30, MIL-I-23011 CL, UNS K94100 DIN 17745 Werkstoff Nr. 1.3917 AFNOR NF A54-301 S.E.W. 385 |
| Diameter | 4-50mm or as customized |
| Length | 2000mm to 5000mm or as customized |
| Surface | Bright, Polished, Pickling, Acid cleaning, Sandblasting |
| Features | High corrosion resistance, low density, good thermal stability |
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