Latrobe Lesco 53 VIM-VAR Premium Carburizing Steel

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Latrobe Lesco 53 VIM-VAR Premium Carburizing Steel
Categories:	Metal; Ferrous Metal; Alloy Steel; Carbon Steel
Material Notes:	LESCO 53 VIM-VAR is a premium quality alloy carburizing gear steel designed to resist softening at elevated service temperatures. It is double vacuum processed by vacuum induction melting followed by vacuum arc remelting to provide optimum metallurgical quality. Based on its combination of high-temperature performance, deep hardenability, and excellent toughness and fatigue resistance, Lesco 53 VIM-VAR find application in demanding helicopter and aerospace drive train components. Information Provided by Timken Latrobe Steel. Timken sold Latrobe in December 2006. They are now Latrobe Specialty Steels Co.
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Mechanical Properties	Metric	English	Comments

Hardness, Rockwell C	35	35	Core between 70°F and 600°F
	55	55	Case at 600°C
Tensile Strength, Ultimate	1170 MPa	170000 psi
Tensile Strength, Yield	965 MPa	140000 psi
Elongation at Break	16 %	16 %	in 2"
Reduction of Area	63.5 %	63.5 %
Charpy Impact	118 - 129 J	87.0 - 95.1 ft-lb	V-Notch

Thermal Properties	Metric	English	Comments
CTE, linear	11.26 µm/m-°C @Temperature 24.0 - 93.0 °C	6.256 µin/in-°F @Temperature 75.2 - 199 °F
	12.25 µm/m-°C @Temperature 24.0 - 316 °C	6.806 µin/in-°F @Temperature 75.2 - 601 °F
	13.05 µm/m-°C @Temperature 24.0 - 538 °C	7.250 µin/in-°F @Temperature 75.2 - 1000 °F

Component Elements Properties	Metric	English	Comments
Carbon, C	0.11 %	0.11 %
Chromium, Cr	1.0 %	1.0 %
Copper, Cu	2.0 %	2.0 %
Iron, Fe	90.24 %	90.24 %
Manganese, Mn	0.40 %	0.40 %
Molybdenum, Mo	3.25 %	3.25 %
Nickel, Ni	2.0 %	2.0 %
Silicon, Si	0.90 %	0.90 %
Vanadium, V	0.10 %	0.10 %

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NTIMK003 / 19351

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