Crucible Steel REX® M42 High Speed Steel, AISI M42

Category	Metal , Ferrous Metal , Tool Steel
Manufacturer	Crucible Steel
Trade Name
Port	Ningbo port,China
Trade Terms	FOB, CFR, CIF
Payment Terms	L/C, T/T, Western Union
Download PDF	Crucible Steel REX® M42 High Speed Steel, AISI M42.pdf
Price	EMAIL US sales@lookpolymers.com
	Online Service lookpolymers 27660005

Material Notes:

REX M42 is a super cobalt high speed steel which may be heat treated to HRC 68. This makes REX M42 outstanding for special purpose cutting tools, with requirements beyond the capability of general purpose high speed steels.Information provided by Crucible Industries

Physical Properties	Metric	English	Comments
Density	8.00 g/cc	0.289 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	235 - 255	235 - 255
Hardness, Rockwell C	66	66	oil quenched from 2050°F
	50 @Tempering Temp. 621 °C	50 @Tempering Temp. 1150 °F	oil quenched from 2050°F then tempered
	54 @Tempering Temp. 593 °C	54 @Tempering Temp. 1100 °F	oil quenched from 2050°F then tempered
	60 @Tempering Temp. 566 °C	60 @Tempering Temp. 1050 °F	oil quenched from 2050°F then tempered
	63 @Tempering Temp. 551.7 °C	63 @Tempering Temp. 1025 °F	oil quenched from 2050°F then tempered
	64.5 @Tempering Temp. 538 °C	64.5 @Tempering Temp. 1000 °F	oil quenched from 2050°F then tempered
Tensile Strength, Ultimate	2560 MPa	372000 psi	hardened at 2175°F
	3080 MPa	446000 psi	hardened at 2100°F
Modulus of Elasticity	207 GPa	30000 ksi
Charpy Impact	6.78 J	5.00 ft-lb	hardened at 2175°F; C-notch
	9.49 J	7.00 ft-lb	hardened at 2100°F; C-notch

Component Elements Properties	Metric	English	Comments
Carbon, C	1.08 %	1.08 %
Chromium, Cr	3.75 %	3.75 %
Cobalt, Co	8.0 %	8.0 %
Iron, Fe	74 %	74 %	as balance
Manganese, Mn	0.30 %	0.30 %
Molybdenum, Mo	9.5 %	9.5 %
Silicon, Si	0.30 %	0.30 %
Sulfur, S	0.030 %	0.030 %
Tungsten, W	1.6 %	1.6 %
Vanadium, V	1.15 %	1.15 %

Chemical Properties	Metric	English	Comments
Critical Temperature	849 °C	1560 °F

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