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Crucible Steel REX® M7N High Speed Steel, AISI M7

Category	Metal , Ferrous Metal , Tool Steel
Manufacturer	Crucible Steel
Trade Name
Port	Shanghai port,China
Trade Terms	FOB, CFR, CIF
Payment Terms	L/C, T/T, Western Union
Download PDF	Crucible Steel REX® M7N High Speed Steel, AISI M7.pdf
Price	EMAIL US sales@lookpolymers.com

Material Notes:

REX M7 is molybdenum type high speed steel designed with higher carbon and vanadium to provide higher hardness after heat treatment and improved wear resistance compared to M1 steel.Information provided by Crucible Industries

Physical Properties	Metric	English	Comments
Density	7.94 g/cc	0.287 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	229 - 248	229 - 248
Hardness, Rockwell C	57 @Tempering Temp. 621 °C	57 @Tempering Temp. 1150 °F	oil quenched from 2200°F then tempered
	60 @Tempering Temp. 607.2 °C	60 @Tempering Temp. 1125 °F	oil quenched from 2200°F then tempered
	62 @Tempering Temp. 593 °C	62 @Tempering Temp. 1100 °F	oil quenched from 2200°F then tempered
	64 @Tempering Temp. 579.4 °C	64 @Tempering Temp. 1075 °F	oil quenched from 2200°F then tempered
	65.2 @Tempering Temp. 566 °C	65.2 @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
CTE, linear	9.61 µm/m-°C @Temperature 37.8 - 260 °C	5.34 µin/in-°F @Temperature 100 - 500 °F
	11.4 µm/m-°C @Temperature 37.8 - 427 °C	6.35 µin/in-°F @Temperature 100 - 800 °F
	12.3 µm/m-°C @Temperature 37.8 - 538 °C	6.81 µin/in-°F @Temperature 100 - 1000 °F

Component Elements Properties	Metric	English	Comments
Carbon, C	1.0 %	1.0 %
Chromium, Cr	3.75 %	3.75 %
Iron, Fe	82 %	82 %	as balance
Manganese, Mn	0.30 %	0.30 %
Molybdenum, Mo	8.75 %	8.75 %
Silicon, Si	0.40 %	0.40 %
Tungsten, W	1.75 %	1.75 %
Vanadium, V	2.0 %	2.0 %

Chemical Properties	Metric	English	Comments
Critical Temperature	832 °C	1530 °F

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