Invar36® is a nickel-iron low expansion alloy that contains 36% nickel and has a thermal expansion rate of about one-tenth that of carbon steel. Alloy 36 maintains nearly constant dimensions over the normal atmospheric temperature range and has a low coefficient of expansion from low temperatures to about 500°F. This nickel-iron alloy is tough, versatile, and maintains good strength at low temperatures.
Product Description
| Grade | UNS K94610, ASTM F15, 1.3981 |
| Specification | MIL-S-16598, IN 1715 Werkstoff Nr. 1.3912 |
| Diameter | 0.15 mm to 3.5 mm or as customized |
| Length | as customized |
| Surface | black, bright, polished |
| Application | - Aircraft controls - Optical & laser systems - Radio & electronic devices - Composite forming tools & dies - Cryogenic components |
Chemical Composition(%)
| C | Mn | P | S | Si |
| 0.15 max | 0.6 max | 0.006 max | 0.004 max | 0.4 max |
| Cr | Ni | Co | Fe | |
| 0.25 max | 35.5-36.5 | 0.5 max | balance |




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