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Latrobe LSS™ O1 Tool Steel (ASTM O1)

Category Metal , Ferrous Metal , Alloy Steel , Carbon Steel , High Carbon Steel , Tool Steel , Oil-Hardening Steel
Manufacturer Latrobe Steel
Trade Name LSS™
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Latrobe LSS™ O1 Tool Steel (ASTM O1).pdf
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Material Notes:
TLS O1 tool steel is the original oil-hardening, "non-shrinking" tool steel that can be hardened to the Rockwell C 65 range from a low austenitizing temperature. TLS O1 is a general-purpose tool steel which is typically used in applications where alloy steels cannot provide sufficient hardness, strength, and wear resistance. Where greater dimensional stability in heat treatment or improved wear resistance are required, tool steels with higher alloy contents, such as A2 or D2 should be considered.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 62
62
Air Cooled from 774°C, 30 minutes
64
64
Air Cooled from 871°C, 30 minutes
65
65
Air Cooled from 802°C, 30 minutes
Modulus of Elasticity 214 GPa
31000 ksi
Machinability 85 - 90 %
85 - 90 %
1% Carbon Steel
Izod Impact Unnotched 27.1 J
20.0 ft-lb
Oil Quenched from 816°C; 150°C Temper Temperature
190 J
140 ft-lb
Oil Quenched from 816°C; 430°C Temper Temperature
Thermal Properties Metric English Comments
CTE, linear 10.73 µm/m-°C

@Temperature 38.0 - 260 °C
5.961 µin/in-°F

@Temperature 100 - 500 °F
14.11 µm/m-°C

@Temperature 38.0 - 538 °C
7.839 µin/in-°F

@Temperature 100 - 1000 °F
Component Elements Properties Metric English Comments
Carbon, C 0.94 %
0.94 %
Chromium, Cr 0.50 %
0.50 %
Iron, Fe 96.56 %
96.56 %
Manganese, Mn 1.2 %
1.2 %
Silicon, Si 0.30 %
0.30 %
Tungsten, W 0.50 %
0.50 %
Chemical Properties Metric English Comments
Critical Temperature 671 °C
1240 °F
Ar3
703 °C
1300 °F
Ar1
732 °C
1350 °F
Ac1
760 °C
1400 °F
Ac3
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