Latrobe Double Six™ ASTM M2 High Speed Steel

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Latrobe Double Six™ ASTM M2 High Speed Steel
Categories:	Metal; Ferrous Metal; Alloy Steel; Carbon Steel; High Carbon Steel; Tool Steel
Material Notes:	DOUBLE SIX (M2) is a tungsten-molybdenum high speed steel with a well balanced composition suitable for a wide variety of applications. World wide, the M2 type is by far the most popular high speed steel having replaced T1 high speed in most applications because of its superior properties and relative economy. Typical applications for Double Six high speed steel include twist drills, taps, milling cutters, reamers, broaches, saws, and knives. 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	8.14 g/cc	8.14 g/cc
Density	8.14 g/cc	0.294 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell C	64	64	Oil Quenched from 1121°C
	64.5	64.5	Oil Quenched from 1232°C
	66	66	Oil Quenched from 1177°C
Modulus of Elasticity	207 GPa	30000 ksi
Machinability	50 - 60 %	50 - 60 %	1% Carbon Steel
Izod Impact Unnotched	51.5 J	38.0 ft-lb	Oil Quenched at 1232°C; 482°C Temper Temperature
	55.6 J	41.0 ft-lb	Oil Quenched at 1232°C; 545°C Temper Temperature
	56.9 J	42.0 ft-lb	Oil Quenched at 1232°C; 622°C Temper Temperature
	56.9 J	42.0 ft-lb	Oil Quenched at 1177°C; 482°C Temper Temperature
	66.4 J	49.0 ft-lb	Oil Quenched at 1177°C; 622°C Temper Temperature
	96.3 J	71.0 ft-lb	Oil Quenched at 1177°C; 566°C Temper Temperature

Thermal Properties	Metric	English	Comments
CTE, linear	10.95 µm/m-°C @Temperature 21.0 - 204 °C	6.083 µin/in-°F @Temperature 69.8 - 399 °F
	12.54 µm/m-°C @Temperature 21.0 - 358 °C	6.967 µin/in-°F @Temperature 69.8 - 676 °F

Processing Properties	Metric	English	Comments
Processing Temperature	749 °C	1380 °F	Critical Temperaure Ar3
	777 °C	1430 °F	Critical Temperaure Ar1
	832 °C	1530 °F	Critical Temperaure Ac1
	877 °C	1610 °F	Critical Temperaure Ac3

Component Elements Properties	Metric	English	Comments
Carbon, C	0.85 %	0.85 %
Chromium, Cr	4.15 %	4.15 %
Iron, Fe	81.42 %	81.42 %
Manganese, Mn	0.28 %	0.28 %
Molybdenum, Mo	5.0 %	5.0 %
Silicon, Si	0.30 %	0.30 %
Tungsten, W	6.15 %	6.15 %
Vanadium, V	1.85 %	1.85 %

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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NTIMK062 / 19409

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