Carpenter Speed Star® High Speed Steel (Red-Hard) (AISI M2)

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Carpenter Speed Star® High Speed Steel (Red-Hard) (AISI M2)
Categories:	Metal; Ferrous Metal; Tool Steel
Material Notes:	Speed Star high speed steel in a fine-grained "Moly"-Tungsten high-speed steel manufactured under close control. It has certain advantages over 18-4-1 high speed steels, some of which are lower cost, less weight per cubic inch, lower hardening temperature and somewhat easier machining. Applications: Lathe tools, Planer tools, Drills, Taps, Reamers, Broaches, Milling cutters, Form cutters, Thread chasers, End mills, Gear cutters, Wood knives Information provided by Carpenter Technology Corporation. Speed Star® is a registered trademark of Carpenter Technology Corporation.
Key Words:	UNS T11302
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Physical Properties	Metric	English	Comments

Specific Gravity	8.15 g/cc	8.15 g/cc

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell C	62	62	Tempered at 1150°F, Quenched at 2200°F
	65	65	As hardened, Quenched at 2200°F
Compressive Yield Strength	3250 MPa	471000 psi	when tempered at 300°F
Izod Impact Unnotched	67.0 J	49.4 ft-lb	when tempered at 300°F
Abrasion	25.8	25.8	loss in mm³, As-Hardened; ASTM G65
	77.7	77.7	loss in mm³, Tempered at 1275°F; ASTM G65

Thermal Properties	Metric	English	Comments
CTE, linear	10.0 µm/m-°C @Temperature 20.0 - 100 °C	5.56 µin/in-°F @Temperature 68.0 - 212 °F
	12.2 µm/m-°C @Temperature 20.0 - 500 °C	6.78 µin/in-°F @Temperature 68.0 - 932 °F
	12.6 µm/m-°C @Temperature 20.0 - 850 °C	7.00 µin/in-°F @Temperature 68.0 - 1560 °F

Component Elements Properties	Metric	English	Comments
Carbon, C	0.82 %	0.82 %
Chromium, Cr	4.25 %	4.25 %
Iron, Fe	81.33 %	81.33 %	As Balance
Manganese, Mn	0.30 %	0.30 %
Molybdenum, Mo	5.0 %	5.0 %
Silicon, Si	0.25 %	0.25 %
Tungsten, W	6.25 %	6.25 %
Vanadium, V	1.8 %	1.8 %

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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NCARN21 / 15860

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