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

Category Metal , Ferrous Metal , Alloy Steel , Low Alloy Steel , Carbon Steel , High Carbon Steel
Manufacturer Latrobe Steel
Trade Name Lescalloy®
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Latrobe Lescalloy® 300M - HS VAC-ARC High Strength Alloy Steel.pdf
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Material Notes:
LESCALLOY 300M-HS 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, which make it suitable for aircraft landing gear, flap tracks, and other structural components. This variant has been developed for applications requiring 287 ksi (1979 MPa) minimum tensile strength through stringent control of chemistry and processing parameters. The enhanced properties of Lescalloy 300M-HS VAC-ARC permit the design of lighter aircraft components that exhibit equivalent load carrying capacities compared to standard 300M components. 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 2010 - 2050 MPa
292000 - 298000 psi
302°C Temper Temperature
Tensile Strength, Yield 1696 - 1731 MPa

@Strain 0.200 %
246000 - 251100 psi

@Strain 0.200 %
302°C Temper Temperature
Elongation at Break 10 - 11 %
10 - 11 %
302°C Temper Temperature
Reduction of Area 31 - 34 %
31 - 34 %
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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