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Latrobe LSSâ„¢ 4142 Alloy Steel (AISI 4142)

Category Metal , Ferrous Metal , Alloy Steel , Carbon Steel , Medium Carbon Steel , Tool Steel
Manufacturer Latrobe Steel
Trade Name LSS™
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Latrobe LSSâ„¢ 4142 Alloy Steel (AISI 4142).pdf
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Material Notes:
TLS 4140 and 4142HT are versatile, alloy steels which are used in variety of tooling and other industrial applications. TLS 4140 is the classic AISI 4140 alloy steel which is sold in the annealed condition at a hardness less than or equal to 217 HBW. TLS 4142HT is a similar steel which is sold prehardened to 28 to 32 HRC (269 to 302 HBW). Pieces of TLS 4142HT which are greater than about 3 inches (76.2mm) in thickness typically exhibit a lower hardness in the central region of the cross section. Typical applications for these steels include break dies, bending dies, support tooling, die holders, gears, flanges, collets, arbors, spindles, axles, clutch parts, forming rolls, wrenches and other hand tools, and various machine tool components.Information Provided by Timken Latrobe Steel.Timken sold Latrobe in December 2006. They are now Latrobe Specialty Steels Co.
Physical Properties Metric English Comments
Specific Gravity 7.83 g/cc
7.83 g/cc
Density 7.83 g/cc
0.283 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell C 27
27
Oil Quenched from 843°C; 649°C Temper Temperature
60
60
Oil Quenched from 843°C; As Quenched
Modulus of Elasticity 200 GPa
29000 ksi
Machinability 60 - 65 %
60 - 65 %
1% Carbon Steel
Thermal Properties Metric English Comments
CTE, linear 12.22 µm/m-°C

@Temperature 21.0 - 100 °C
6.789 µin/in-°F

@Temperature 69.8 - 212 °F
Thermal Conductivity 51.9 W/m-K
360 BTU-in/hr-ft²-°F
Component Elements Properties Metric English Comments
Carbon, C 0.40 %
0.40 %
Chromium, Cr 1.0 %
1.0 %
Iron, Fe 97.15 %
97.15 %
Manganese, Mn 1.0 %
1.0 %
Molybdenum, Mo 0.20 %
0.20 %
Silicon, Si 0.25 %
0.25 %
Chemical Properties Metric English Comments
Critical Temperature 260 °C
500 °F
Mf
343 °C
649 °F
Ms
680 °C
1260 °F
Ar1
732 °C
1350 °F
Ac1
743 °C
1370 °F
Ar3
804 °C
1480 °F
Ac3
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