Latrobe CM-50™ ASTM M50 High Speed Steel

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Latrobe CM-50™ ASTM M50 High Speed Steel
Categories:	Metal; Ferrous Metal; Alloy Steel; Carbon Steel; High Carbon Steel; Tool Steel
Material Notes:	CM-50 is classified as an intermediate type high speed steel of the molybdenum chromium- vanadium variety. It is recommended for applications with moderate cutting conditions, such as woodworking tools, where toughness is of prime importance and where there is less need for red hardness. 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	7.84 g/cc	7.84 g/cc
Density	7.83 g/cc	0.283 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell C	64	64	Oil Quenched from 1149°C
	64.5	64.5	Oil Quenched from 1038°C
	65	65	Oil Quenched from 1107°C
Modulus of Elasticity	203 GPa	29500 ksi
Machinability	65 - 75 %	65 - 75 %	1% Carbon Steel
Izod Impact Unnotched	36.6 J	27.0 ft-lb	Oil Quenched at 1121°C; 482°C Temper Temperature
	67.8 J	50.0 ft-lb	Oil Quenched at 1121°C; 594°C Temper Temperature
	74.6 J	55.0 ft-lb	Oil Quenched at 1121°C; 622°C Temper Temperature

Thermal Properties	Metric	English	Comments
CTE, linear	11.3 µm/m-°C @Temperature 21.0 - 204 °C	6.28 µin/in-°F @Temperature 69.8 - 399 °F
	12.98 µm/m-°C @Temperature 21.0 - 538 °C	7.211 µin/in-°F @Temperature 69.8 - 1000 °F

Processing Properties	Metric	English	Comments
Processing Temperature	730 °C	1350 °F	Critical Temperaure Ar1
	751 °C	1380 °F	Critical Temperaure Ar3
	810 °C	1490 °F	Critical Temperaure Ac1
	846 °C	1550 °F	Critical Temperaure Ac3

Component Elements Properties	Metric	English	Comments
Carbon, C	0.84 %	0.84 %
Chromium, Cr	4.1 %	4.1 %
Iron, Fe	89.01 %	89.01 %
Manganese, Mn	0.30 %	0.30 %
Molybdenum, Mo	4.25 %	4.25 %
Silicon, Si	0.50 %	0.50 %
Vanadium, V	1.0 %	1.0 %

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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NTIMK073 / 19420

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