Latrobe LSS™ H11 Hot Work Tool Steel (ASTM H11)

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Latrobe LSS™ H11 Hot Work Tool Steel (ASTM H11)
Categories:	Metal; Ferrous Metal; Alloy Steel; Tool Steel; Hot Work Steel
Material Notes:	TLS H11 hot work tool steel is a 5% chromium hot work steel that is characterized by excellent impact toughness. It contains less vanadium than the widely-used H13 hot work tool steel. This provides for the higher toughness, with some reduction in wear resistance and temper resistance. TLS H11 hot work tool steel is a deep-hardening, air-hardening steel that exhibits minimal size change during heat treatment. It has good resistance to thermal fatigue cracking (heat checking) and excellent resistance to gross cracking and thermal shock when water cooled in service. TLS H11 hot work tool steel is recommended for hot tooling applications where maximum resistance to cracking is required. Such applications include hot punches, die casting dies, forging dies, hot shear blades, hot gripper dies, and extrusion tooling. 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	7.80 g/cc	7.80 g/cc
Density	7.81 g/cc	0.282 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell C	52.5	52.5	Air Cooled from 982°C, 45 minutes
	56	56	Air Cooled from 1010°C, 45 minutes
	57	57	Air Cooled from 1038°C, 45 minutes
Modulus of Elasticity	207 GPa	30000 ksi
	159 GPa @Temperature 538 °C	23000 ksi @Temperature 1000 °F
	190 GPa @Temperature 204 °C	27500 ksi @Temperature 400 °F
Machinability	75 - 80 %	75 - 80 %	1% Carbon Steel
Charpy Impact	13.6 J	10.0 ft-lb	V-Notch; Air Cooled from 1010°C; 535°C Temper Temperature
	27.1 J	20.0 ft-lb	V-Notch; Air Cooled from 1010°C; 650°C Temper Temperature
	33.9 J	25.0 ft-lb	V-Notch; Air Cooled from 1010°C; 370 Temper Temperature

Thermal Properties	Metric	English	Comments
CTE, linear	11.82 µm/m-°C @Temperature 21.0 - 204 °C	6.567 µin/in-°F @Temperature 69.8 - 399 °F
	13.1 µm/m-°C @Temperature 21.0 - 538 °C	7.28 µin/in-°F @Temperature 69.8 - 1000 °F
Thermal Conductivity	17.58 W/m-K @Temperature 27.0 °C	122.0 BTU-in/hr-ft²-°F @Temperature 80.6 °F
	23.84 W/m-K @Temperature 204 °C	165.4 BTU-in/hr-ft²-°F @Temperature 399 °F
	26.78 W/m-K @Temperature 1200 °C	185.9 BTU-in/hr-ft²-°F @Temperature 2190 °F

Processing Properties	Metric	English	Comments
Processing Temperature	732 °C	1350 °F	Critical Temperaure Ar3
	793 °C	1460 °F	Critical Temperaure Ar1
	830 °C	1530 °F	Critical Temperaure Ac1
	852 °C	1570 °F	Critical Temperaure Ac3

Component Elements Properties	Metric	English	Comments
Carbon, C	0.40 %	0.40 %
Chromium, Cr	5.0 %	5.0 %
Iron, Fe	91.5 %	91.5 %
Manganese, Mn	0.30 %	0.30 %
Molybdenum, Mo	1.3 %	1.3 %
Silicon, Si	1.0 %	1.0 %
Vanadium, V	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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NTIMK081 / 19428

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