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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

Equivalent Designations

Nilo 36, FeNi36, UNS K93600 & K93601, W. Nr. 1.3912

	PHYSICAL PROPERTIES

Specific Gravity

8.05

Magnetic Properties

Ferromagnetic

Curie Temperature

279 °C

	ELASTIC PROPERTIES

Tensile Modulus

140 GPa

Shear Modulus

57 GPa

Poisson Ratio

0.25

	ELECTRICAL PROPERTIES

Electrical Volume Resistivity

8e-7 ohm.m

	THERMAL PROPERTIES

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

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

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