Crucible Steel REX® M2 S 1.0C High Speed Steel, AISI M2

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Crucible Steel REX® M2 S 1.0C High Speed Steel, AISI M2
Categories:	Metal; Ferrous Metal; Tool Steel
Material Notes:	REX M2S (1.0C) is a sulfur-bearing high carbon version of the regular CRUCIBLE REX M2 high speed steel. The sulfur addition provides good grindability and an improvement in machinability of 25 to 35 percent over a comparable nonsulfurized grade. The increase in carbon content produces higher attainable hardness, increased wear resistance and red hardness which contribute to significant gains in cutting tool performance. The higher carbon offers improved hardenability in larger tool sections. Information provided by Crucible Industries
Key Words:	AISI M2
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Physical Properties	Metric	English	Comments

Density	8.14 g/cc	0.294 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	229 - 255	229 - 255
Hardness, Rockwell C	61 @Tempering Temp. 607.2 °C	61 @Tempering Temp. 1125 °F	oil quenched from 2200°F then tempered
	63 @Tempering Temp. 593 °C	63 @Tempering Temp. 1100 °F	oil quenched from 2200°F then tempered
	64.3 @Tempering Temp. 579.4 °C	64.3 @Tempering Temp. 1075 °F	oil quenched from 2200°F then tempered
	65.5 @Tempering Temp. 566 °C	65.5 @Tempering Temp. 1050 °F	oil quenched from 2200°F then tempered
	66 @Tempering Temp. 538 °C	66 @Tempering Temp. 1000 °F	oil quenched from 2200°F then tempered
	66 @Tempering Temp. 551.7 °C	66 @Tempering Temp. 1025 °F	oil quenched from 2200°F then tempered
Modulus of Elasticity	207 GPa	30000 ksi

Thermal Properties	Metric	English	Comments
CTE, linear	11.5 µm/m-°C @Temperature 21.1 - 260 °C	6.40 µin/in-°F @Temperature 70.0 - 500 °F
	11.8 µm/m-°C @Temperature 21.1 - 427 °C	6.58 µin/in-°F @Temperature 70.0 - 800 °F
	12.1 µm/m-°C @Temperature 21.1 - 538 °C	6.72 µin/in-°F @Temperature 70.0 - 1000 °F

Processing Properties	Metric	English	Comments
Processing Temperature	829.4 °C	1525 °F	Critical Thermal Treatment Temperature

Component Elements Properties	Metric	English	Comments
Carbon, C	1.0 %	1.0 %
Chromium, Cr	4.15 %	4.15 %
Iron, Fe	80.8 %	80.8 %	as balance
Manganese, Mn	0.30 %	0.30 %
Molybdenum, Mo	5.0 %	5.0 %
Silicon, Si	0.30 %	0.30 %
Sulfur, S	0.10 %	0.10 %
Tungsten, W	6.4 %	6.4 %
Vanadium, V	1.95 %	1.95 %

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NCRUC925 / 160376

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