Latrobe Lescalloy® 6305 VAC-ARC ; High Strength Alloy Steel

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Latrobe Lescalloy® 6305 VAC-ARC ; High Strength Alloy Steel
Categories:	Metal; Ferrous Metal; Alloy Steel; Carbon Steel; High Carbon Steel
Material Notes:	LESCALLOY 6305 VAC-ARC steel is a modified 4140 steel with higher molybdenum and a vanadium addition. The alloy steel is generally used in the 160/180,000 psi tensile strength range obtained with an 1100°F temper where good toughness is critical, such as jet engine shafts. It is produced by the consumable electrode vacuum arc remelting process to provide optimum cleanliness and preferred ingot structure. Information Provided by Timken Latrobe Steel. Timken sold Latrobe in December 2006. They are now Latrobe Specialty Steels Co.
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Physical Properties	Original Value	Comments

Density	0.283 lb/in³

Mechanical Properties	Original Value	Comments
Hardness, Rockwell C	30	1300°F Temper
	45	600°F Temper
Tensile Strength, Ultimate	141 ksi	13"x11", 700°F
	160 ksi	13"x11", RT
	139 ksi @Thickness 50.8 mm, Temperature 371 °C
	164 ksi @Thickness 50.8 mm, Temperature 21.1 °C
Tensile Strength, Yield	938 MPa @Strain 0.2 %	13"x11", RT
	765 MPa @Strain 0.2 %, Temperature 371 °C
	800 MPa @Strain 0.2 %, Temperature 371 °C	13"x11"
	958 MPa @Strain 0.2 %, Temperature 21.1 °C
	765 MPa @Strain 0.2 %, Thickness 50.8 mm
	958 MPa @Strain 0.2 %, Thickness 50.8 mm
Elongation at Break	15 %	13"x11", RT
	30 %	13"x11", 700°F
	16.2 % @Thickness 50.8 mm, Temperature 21.1 °C
	22.3 % @Thickness 50.8 mm, Temperature 371 °C
Reduction of Area	51.2 %	13"x11", RT
	72.6 % @Temperature 371 °C	13"x11"
	53.3 % @Thickness 50.8 mm, Temperature 21.1 °C
	75.2 % @Thickness 50.8 mm, Temperature 371 °C

Thermal Properties	Original Value	Comments
CTE, linear	11.34 µm/m-°C @Temperature -17.8 - 93.0 °C
Specific Heat Capacity	0.110 BTU/lb-°F
Thermal Conductivity	37.5 W/m-K

Component Elements Properties	Original Value	Comments
Carbon, C	0.44 %
Chromium, Cr	0.95 %
Iron, Fe	97.03 %
Manganese, Mn	0.55 %
Molybdenum, Mo	0.50 %
Silicon, Si	0.25 %
Vanadium, V	0.28 %

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NTIMK041 / 19389

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