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Special Metals NILO® Alloy 475 Controlled-Expansion Alloy  (discontinued **)
Categories: Metal; Nonferrous Metal; Nickel Alloy; Superalloy; Iron Base

Material Notes: Inflection point 360°C. A nickel-iron-chromium controlled-expansion alloy containing 47% nickel. It is designed to have thermal-expansion characteristics that closely match those of the soft glasses of the lead or soda-lime type up to their annealing temperatures. The alloy is a particularly good match with L92 glass. Used for various glass-to-metal seals and for anode-cavity caps in television tubes. The standard product form is strip.

Data provided by the manufacturer, Special Metals.

Key Words: DIN 17745; Werkstoff Nr. 2.4486; AFNOR NF A54-301
Vendors: Visit metalmen for your metals needs. Products include special chemistry, tight tolerances, custom tempers, odd dimensions/forms, and small quantities. Phone 1-800-767-9494.

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Physical PropertiesMetricEnglishComments
Density 8.18 g/cc0.296 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Tensile Strength, Ultimate 520 MPa75400 psiAnnealed
Tensile Strength, Yield 180 MPa26100 psiAnnealed; 0.2% offset.
Elongation at Break 37 %37 %Annealed
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.0000850 ohm-cm0.0000850 ohm-cm
 
Thermal PropertiesMetricEnglishComments
CTE, linear  8.20 µm/m-°C
@Temperature 20.0 - 100 °C
4.56 µin/in-°F
@Temperature 68.0 - 212 °F
 9.75 - 10.35 µm/m-°C
@Temperature 20.0 - 450 °C
5.42 - 5.750 µin/in-°F
@Temperature 68.0 - 842 °F
Thermal Conductivity 12.6 W/m-K87.4 BTU-in/hr-ft²-°F
Melting Point 1450 °C2640 °F
 
Component Elements PropertiesMetricEnglishComments
Chromium, Cr 4.8 %4.8 %
Iron, Fe 48 %48 %nominal; adjustable to meet expansion requirements
Nickel, Ni 47 %47 %nominal; adjustable to meet expansion requirements

**
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NIND23 / 17527

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