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| PRODUCT DATA of Invar 36 |
| Material | Invar 36 |
| Product Datasheet | invar36 invar36-from Ni institute NILO and NILOMAG alloys Invar-AM |
| General Information | Binary nickel-iron alloy containing 36% nickel. It has a very low room-temperature thermal expansion coefficient. |
| Precautions | This material should not be used above its thermal inflection point of 190C |
| Chemical Composition | Fe 36Ni |
| Name of Manufacturer | AcelorMittal
5 Rue Luigi Cherubini, 93212 Saint Denis Cedex, France +33 (0) 71920000 info@imphy.com www.imphy.com Special Metals Corporation 3200 Riverside Drive, Huntington, WV, U.S.A. 25705-1771 +1 (304) 526-5100, +1 (800) 334-4626 +1 (304) 526-5643 www.specialmetals.com |
| EXPERIENCE IN PRACTICE |
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| Equivalent Designations | Nilo 36, FeNi36, UNS K93600 & K93601, W. Nr. 1.3912 |
| PHYSICAL PROPERTIES |
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| Specific Gravity | 8.05 |
| Magnetic Properties | Ferromagnetic |
| Curie Temperature | 279 °C |
| ELASTIC PROPERTIES |
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| Tensile Modulus | 140 GPa |
| Shear Modulus | 57 GPa |
| Poisson Ratio | 0.25 |
| ELECTRICAL PROPERTIES |
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| Electrical Volume Resistivity | 8e-7 ohm.m |
| THERMAL PROPERTIES |
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| Thermal Conductivity | 10 W/m.K Data Quality: Manufacturer's data |
| Thermal Expansion Coefficient | 1.5 to 10.1 μstrain/°C Data Quality: Manufacturer's data |
| Melting Range | 1430 °C |
| RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY |
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| Stress Corrosion Status | High Resistance to SCC: Table 1
Remark: acc. to ECSS-Q-ST-70-36C Data Quality: Design Data |
| Machinability | Before machining, the welded structures must be fully annealed. The machinability of Invar is similar to austenitic stainless steel such as AISI 304. |
| Welding | Invar 36 can be welded by the conventional methods. Caution must be taken so as not to overheat the molten metal. This will avoid spattering of the molten metal and pits in the welded area. When filler rod is required , Invar-rod has been used. |
| Brazing | Silver and zinc-free alloys have been used for brazing Invar 36. This alloy should be annealed prior to brazing. |
| Plating | Alloy 36 can be chromium, silver and nickel plated by the usual methods used for ferrous alloys. |
| FLUID SYSTEMS COMPATIBILITY |
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| Gaseous Oxygen (GOX) | Meets the mechanical impact requirements. No batch test required. |
| Liquid Oxygen (LOX) | Meets the mechanical impact requirements. No batch test required. |
| Low Pressure Hydrogen (LOH2) | Fails some mechanical impact requirements. Needs batch test |
| High Pressure Hydrogen (HIH2) | Fails mechanical impact |