Latrobe LSS™ O1 Tool Steel (ASTM O1)

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Latrobe LSS™ O1 Tool Steel (ASTM O1)
Categories:	Metal; Ferrous Metal; Alloy Steel; Carbon Steel; High Carbon Steel; Tool Steel; Oil-Hardening Steel
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.
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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

Processing Properties	Metric	English	Comments
Processing Temperature	671 °C	1240 °F	Critical Temperaure Ar3
	703 °C	1300 °F	Critical Temperaure Ar1
	732 °C	1350 °F	Critical Temperaure Ac1
	760 °C	1400 °F	Critical Temperaure Ac3

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 %

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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NTIMK115 / 19462

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