Latrobe LSS™ D5 Tool Steel (ASTM D5)

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Latrobe LSS™ D5 Tool Steel (ASTM D5)
Categories:	Metal; Ferrous Metal; Alloy Steel; Carbon Steel; High Carbon Steel; Tool Steel; Air-Hardening Steel
Material Notes:	TLS D5 tool steel is an air hardening, high-carbon, high-chromium, tool steel that is characterized by a cobalt addition which provides unique resistance to galling and pick-up. The cobalt also imparts some resistance to tempering, which makes TLS D5 suitable for some semi-hot work tooling applications. 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	7.73 g/cc	7.73 g/cc
Density	7.72 g/cc	0.279 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell C	62	62	Air Cooled from 1038°C, 30 minutes
	62.5	62.5	Air Cooled from 982°C, 45 minutes
	63	63	Air Cooled from 996°C, 30 minutes
Modulus of Elasticity	207 GPa	30000 ksi
Machinability	45 - 50 %	45 - 50 %	1% Carbon Steel
Izod Impact Unnotched	54.2 J	40.0 ft-lb	Air Cooled from 1010°C; 483°C Temper Temperature
	70.5 J	52.0 ft-lb	Air Cooled from 1010°C; 145°C Temper Temperature
	119 J	88.0 ft-lb	Air Cooled from 1010°C; 593°C Temper Temperature

Thermal Properties	Metric	English	Comments
CTE, linear	9.88 µm/m-°C @Temperature 38.0 - 260 °C	5.49 µin/in-°F @Temperature 100 - 500 °F
	12.02 µm/m-°C @Temperature 38.0 - 538 °C	6.678 µin/in-°F @Temperature 100 - 1000 °F

Processing Properties	Metric	English	Comments
Processing Temperature	754 °C	1390 °F	Critical Temperaure Ar1
	832 °C	1530 °F	Critical Temperaure Ac1

Component Elements Properties	Metric	English	Comments
Carbon, C	1.5 %	1.5 %
Chromium, Cr	11.65 %	11.65 %
Cobalt, Co	2.8 %	2.8 %
Iron, Fe	82.4 %	82.4 %
Manganese, Mn	0.35 %	0.35 %
Molybdenum, Mo	0.80 %	0.80 %
Silicon, Si	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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NTIMK109 / 19456

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