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Crucible Steel CPM® Rex M4 HC(HS) Tool Steel

Category Metal , Ferrous Metal , Carbon Steel , High Carbon Steel , Tool Steel
Manufacturer Crucible Steel
Trade Name CPM®
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Crucible Steel CPM® Rex M4 HC(HS) Tool Steel.pdf
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Material Notes:
CPM REX M4 HC(HS) is a high vanadium special purpose high speed steel exhibiting better wear resistance and toughness than M2 or M3 in cold work punches, die inserts and cutting applications involving high speed and light cuts.The high carbon (HC) modification to standard M4 is designed to provide optimum hardening response in larger cross-section tools or in vacuum or atmosphere heat treating.The high sulfur (HS) modification is standard for larger diameter bars, providing enhanced machinability and grindability.The CPM process produces very homogeneous, high quality steel characterized by superior dimensional stability, grindability, and toughness compared to steels produced by conventional processes.Information provided by Crucible Specialty Metals.
Physical Properties Metric English Comments
Density 7.97 g/cc
0.288 lb/in³
Mechanical Properties Metric English Comments
Hardness, Brinell 225 - 255
225 - 255
Annealed
Hardness, Rockwell C 63.5
63.5
Hardening Temperature- 1165°C; Tempering Temperature- 565°C
65.5
65.5
Hardening Temperature- 1205°C; Tempering Temperature- 550°C
Modulus of Elasticity 214 GPa
31000 ksi
Flexural Strength 5088 MPa
738000 psi
Hardening Temperature- 1205°C, Tempering Temperature- 550°C
5129 MPa
743900 psi
Hardening Temperature- 1165°C, Tempering Temperature- 565°C
Charpy Impact 27.0 J
19.9 ft-lb
Hardening Temperature- 1205°C; Tempering Temperature- 550°C
38.0 J
28.0 ft-lb
Hardening Temperature- 1165°C; Tempering Temperature- 565°C
Thermal Properties Metric English Comments
CTE, linear 11.5 µm/m-°C

@Temperature 40.0 - 260 °C
6.39 µin/in-°F

@Temperature 104 - 500 °F
12.1 µm/m-°C

@Temperature 40.0 - 540 °C
6.72 µin/in-°F

@Temperature 104 - 1000 °F
Thermal Conductivity 18.99 W/m-K
131.8 BTU-in/hr-ft²-°F
20.82 W/m-K

@Temperature 100 °C
144.5 BTU-in/hr-ft²-°F

@Temperature 212 °F
23.96 W/m-K

@Temperature 300 °C
166.3 BTU-in/hr-ft²-°F

@Temperature 572 °F
25.58 W/m-K

@Temperature 500 °C
177.5 BTU-in/hr-ft²-°F

@Temperature 932 °F
26.09 W/m-K

@Temperature 540 °C
181.1 BTU-in/hr-ft²-°F

@Temperature 1000 °F
Component Elements Properties Metric English Comments
Carbon, C 1.42 %
1.42 %
Chromium, Cr 4.0 %
4.0 %
Iron, Fe 79.47 %
79.47 %
As Remainder
Magnesium, Mg 0.30 - 0.70 %
0.30 - 0.70 %
Molybdenum, Mo 5.25 %
5.25 %
Sulfur, S 0.060 - 0.22 %
0.060 - 0.22 %
Tungsten, W 5.5 %
5.5 %
Vanadium, V 4.0 %
4.0 %
Descriptive Properties Value Comments
Grindability; Metal Removed/Wheel Worn 4
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