Special Metals NILO® Alloy 475 Controlled-Expansion Alloy

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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
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Physical Properties	Metric	English	Comments

Density	8.18 g/cc	0.296 lb/in³

Mechanical Properties	Metric	English	Comments
Tensile Strength, Ultimate	520 MPa	75400 psi	Annealed
Tensile Strength, Yield	180 MPa	26100 psi	Annealed; 0.2% offset.
Elongation at Break	37 %	37 %	Annealed

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000850 ohm-cm	0.0000850 ohm-cm

Thermal Properties	Metric	English	Comments
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-K	87.4 BTU-in/hr-ft²-°F
Melting Point	1450 °C	2640 °F

Component Elements Properties	Metric	English	Comments
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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