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Crucible Steel REX® M4 High Speed Steel

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® M4 High Speed Steel.pdf
Price	EMAIL US sales@lookpolymers.com
	Online Service lookpolymers 27660005

Material Notes:

REX M4 is a special purpose high speed steel designed to give high wear resistance in tools. Its high vanadium and carbon content provide for high resistance to cratering and wear in cold work punches, die inserts, and cutting applications involving high speeds and light cuts. It is designed to give maximum performance working with abrasive materials, exhibiting better wear resistance than M2 or M3.Information provided by Crucible Industries

Physical Properties	Metric	English	Comments
Density	7.92 g/cc	0.286 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell C	63 @Tempering Temp. 568.3 °C	63 @Tempering Temp. 1055 °F	hardened at 2120°F, then quenched and tempered
	65 @Tempering Temp. 551.7 °C	65 @Tempering Temp. 1025 °F	hardened at 2200°F, then quenched and tempered
Modulus of Elasticity	214 GPa	31000 ksi
Charpy Impact	11.5 J @Tempering Temp. 551.7 °C	8.50 ft-lb @Tempering Temp. 1025 °F	hardened at 2200°F, then tempered; C-notch
	14.9 J @Tempering Temp. 568.3 °C	11.0 ft-lb @Tempering Temp. 1055 °F	hardened at 2120°F, then tempered; C-notch

Thermal Properties	Metric	English
CTE, linear	9.58 µm/m-°C @Temperature 37.8 - 260 °C	5.32 µin/in-°F @Temperature 100 - 500 °F
	11.2 µm/m-°C @Temperature 37.8 - 427 °C	6.24 µin/in-°F @Temperature 100 - 800 °F
	12.0 µm/m-°C @Temperature 37.8 - 538 °C	6.64 µin/in-°F @Temperature 100 - 1000 °F
	12.3 µm/m-°C @Temperature 37.8 - 649 °C	6.82 µin/in-°F @Temperature 100 - 1200 °F
	12.6 µm/m-°C @Temperature 37.8 - 816 °C	6.99 µin/in-°F @Temperature 100 - 1500 °F

Component Elements Properties	Metric	English	Comments
Carbon, C	1.3 %	1.3 %
Chromium, Cr	4.3 %	4.3 %
Iron, Fe	79.7 %	79.7 %	as balance
Manganese, Mn	0.30 %	0.30 %
Molybdenum, Mo	4.5 %	4.5 %
Silicon, Si	0.30 %	0.30 %
Tungsten, W	5.6 %	5.6 %
Vanadium, V	4.0 %	4.0 %

Chemical Properties	Metric	English	Comments
Critical Temperature	840.6 °C	1545 °F	Ac<sub>1</sub>

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