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Latrobe Lescalloy® 300M VAC-ARC High Strength Alloy Steel

Category Metal , Ferrous Metal , Alloy Steel , Carbon Steel , High Carbon Steel
Manufacturer Latrobe Steel
Trade Name Lescalloy®
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Latrobe Lescalloy® 300M VAC-ARC High Strength Alloy Steel.pdf
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Material Notes:
LESCALLOY 300M VAC-ARC steel is a modified 4340 steel with added silicon allowing for use of a higher tempering temperature. The steel has high hardenability and strength with good ductility and toughness in heavy sections. It is used primarily in the 270/300 ksi (1862/2068) tensile strength range for aircraft landing gears, flap tracks and other structural applications. Vacuum arc remelting (VAR) is used 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.
Physical Properties Metric English Comments
Density 7.83 g/cc
0.283 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell C 57.5
57.5
1" from quench end; Jominy End Quench Hardenability
58
58
1/2" from quenched end; Jominy End Quench Hardenability
59
59
1/8" from quenched end; Jominy End Quench Hardenability
Tensile Strength, Ultimate 1970 - 1990 MPa
286000 - 288000 psi
302°C Temper Temperature
Tensile Strength, Yield 1655 - 1689 MPa

@Strain 0.200 %
240000 - 245000 psi

@Strain 0.200 %
302°C Temper Temperature
Elongation at Break 8.5 - 11 %
8.5 - 11 %
302°C Temper Temperature
Reduction of Area 31 - 39 %
31 - 39 %
302°C Temper Temperature
Thermal Properties Metric English Comments
CTE, linear 11.34 µm/m-°C

@Temperature -17.8 - 93.0 °C
6.300 µin/in-°F

@Temperature -0.0400 - 199 °F
Specific Heat Capacity 0.448 J/g-°C
0.107 BTU/lb-°F
Thermal Conductivity 37.49 W/m-K
260.2 BTU-in/hr-ft²-°F
Component Elements Properties Metric English Comments
Carbon, C 0.42 %
0.42 %
Chromium, Cr 0.80 %
0.80 %
Iron, Fe 94.11 %
94.11 %
Manganese, Mn 0.75 %
0.75 %
Molybdenum, Mo 0.40 %
0.40 %
Nickel, Ni 1.8 %
1.8 %
Silicon, Si 1.65 %
1.65 %
Vanadium, V 0.070 %
0.070 %
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