Super lnvar 32-5 is a controlled expansion alloy with a chemistry of 32% nominal nickel. The substitution of 5.0% (maximum) cobalt for some of the nickel lowers the thermal expansion coefficient when compared to lnvar. Provided on this page as a general reference are tables containing Super lnvar 32-5 annealed average linear coefficient of thermal expansion, typical physical properties, mechanical properties, chemical composition, and specifications.
If you have any questions regarding the properties of this alloy, please contact the team at EFINEA 800-348-6268. Along with our experienced sales team, we have metallurgists on-staff to assist you in using this alloy in your project.
To download your copy of EFINEA Super lnvar 32-5 data sheet, or any other of our Controlled Expansion Alloy data sheets, please go to the Data Sheets section in our Technical Library.
Super Invar 32-5 Average Coefficient of Thermal Expansion - Annealed |
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|---|---|---|---|
| Temperature Range, °C Heat Treatment 30°C to | UNS NO. K93500 871°C, 1 h, Furnace Cool μm/m°C | Temperature Range, °C Heat Treatment 30°C to | UNS No. K93500 871°C 1 h, Furnace Cool μm/m°C |
| 100 | 0.84 | 400 | 7.03 |
| 150 | 1.17 | 500 | 8.99 |
| 200 | 1.72 | 600 | 10.56 |
| 250 | 2.53 | 700 | 11.56 |
| 300 | 4.16 | 800 | 12.21 |
| 350 | 5.74 | 900 | 12.96 |
| Source: ASTM F1684 X2.1 | |||
To compare the linear coefficient of thermal expansion across our line of controlled expansion glass and sealing alloys, please refer to the Thermal Expansion Table.
Super Invar 32-5 Typical Physical Properties | ||
|---|---|---|
| Density | lb/cu in | 0.294 |
| Specific Gravity | 8.15 | |
| Curie Temp | °F | 500 |
| °C | 260 | |
| Poisson's Ratio | 0.230 | |
| Electrical Resistivity (73°C) | ohm-cir mil/ft | 481.3 |
| microhm-cm | 80 | |
| Thermal Conductivity | BTU-in/sq. ft-hr-°F | 72.6 |
| W/m-°C | 10 | |
| Specific Heat | Cal/gm°C | 0.12 |
| Source: ASTM F1684/CarTech Super Invar 32-5 data sheet v. 3/15/04/CarTech Low Expansion Alloys Brochure | ||
Super Invar 32-5 Mechanical Properties | ||
|---|---|---|
| Tensile Strength | ksi | 70 |
| MPa | 483 | |
| Yield Strength (0.2%) | ksi | 40 |
| MPa | 276 | |
| Elongation | % in 2" | 40 |
| Hardness - Annealed | Rockwell B | 75 |
| Modulus of Elasticity | ksi | 21.0 x 103 |
| Source: CarTech Super Invar 32-5 data sheet v. 3/15/04 |
Super Invar 32-5 Chemical Composition | |
|---|---|
| Iron, nominal | Bal |
| Nickel, nominal | 32.0 |
| Cobalt, nominal | 5.0 |
| Manganese, max | 0.60 |
| Silicon, max | 0.25 |
| Chromium, max | 0.25 |
| Carbon, max | 0.05 |
| Aluminum, max | 0.10 |
| Magnesium, max | 0.10 |
| Zirconium, max | 0.10 |
| Titanium, max | 0.10 |
| Phosphorus, max | 0.015 |
| Sulfur, max | 0.015 |
| Source: ASTM F1684 Table 1 UNS No. K93500 | |
Super Invar 32-5 Specifications | |
|---|---|
| ASTM F1684 | UNS K93500 |
For additional information on specifications of the materials distributed by EFINEA, please visit the websites of the international organizations that develop and publish technical standards: ASTM International and ASM International.