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Ensinger PEI

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Aperam Invar® Controlled Expansion Alloys Iron-Nickel Alloys
Categories: Metal; Ferrous Metal

Material Notes: Invar® presents the particularity to have a very high temperature coefficient. At 300°C for example, its resistivity has already increased of 2.65 times its value when cold. This particularity makes it very interesting for the use of emergent heaters because its power will fall when hot. It is in this respect auto regulating. Typical application is electric blanket.

Information provided by Aperam

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Physical PropertiesOriginal ValueComments
Density 8.11 g/cc
 
Mechanical PropertiesOriginal ValueComments
Tensile Strength 500 MPa
Tensile Strength, Yield 300 MPa
Elongation at Break 25 %on 100 mm
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 0.000080 ohm-cmTemperature coefficient = 0.00135/°C from 20 - 100°C
 
Thermal PropertiesOriginal ValueComments
CTE, linear 1.50 µm/m-°C
@Temperature 20.0 - 1000 °C
Thermal Conductivity 11.0 W/m-K
@Temperature 120 °C
Melting Point 1425 °C
 
Component Elements PropertiesOriginal ValueComments
Iron, Fe 64 %
Nickel, Ni 36 %

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