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Latrobe DuraTechâ„¢ M4 Powder Metal High Speed Steel (ASTM M4)

Category Metal , Ferrous Metal , Alloy Steel , Carbon Steel , High Carbon Steel , Tool Steel
Manufacturer Latrobe Steel
Trade Name DuraTech™
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Latrobe DuraTechâ„¢ M4 Powder Metal High Speed Steel (ASTM M4).pdf
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Material Notes:
DuraTech M4 high speed steel is an extremely versatile high speed steel which provides a unique combination of high wear resistance with high impact toughness and transverse bend strength. A large volume of vanadium carbides provides the high wear resistance. The high impact toughness and high transverse bend strength are results of the fine grain size, small carbides, and superior cleanliness of the powder metallurgy (PM) microstructure. DuraTech M4 offers improved cutting tool life compared to conventionally-wrought M1, M2, M7, and other lower-alloyed high speed steels. DuraTech M4 also excels in cold work tooling applications, where it provides better toughness and wear resistance than high-carbon, high-chromium die steels such as D2 and D3.Information Provided by Timken Latrobe Steel.Timken sold Latrobe in December 2006. They are now Latrobe Specialty Steels Co.
Physical Properties Metric English Comments
Specific Gravity 7.92 g/cc
7.92 g/cc
Density 7.92 g/cc
0.286 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell C 57
57
538°C Test Temperature; Oil Quenched from 1204°C; 552°C Triple Temper Temperature
65.5
65.5
22°C Test Temperature; Oil Quenched from 1204°C; 552°C Triple Temper Temperature
20

@Temperature 704 °C
20

@Temperature 1300 °F
Oil Quenched from 1204°C; 552°C Triple Temper Temperature
Modulus of Elasticity 214 GPa
31000 ksi
Machinability 40 - 45 %
40 - 45 %
1% Carbon Steel
Thermal Properties Metric English Comments
CTE, linear 9.53 µm/m-°C

@Temperature 38.0 - 260 °C
5.29 µin/in-°F

@Temperature 100 - 500 °F
12.24 µm/m-°C

@Temperature 38.0 - 649 °C
6.800 µin/in-°F

@Temperature 100 - 1200 °F
Component Elements Properties Metric English Comments
Carbon, C 1.45 %
1.45 %
Chromium, Cr 4.5 %
4.5 %
Iron, Fe 79 %
79 %
Manganese, Mn 0.25 %
0.25 %
Molybdenum, Mo 5.2 %
5.2 %
Silicon, Si 0.25 %
0.25 %
Tungsten, W 5.5 %
5.5 %
Vanadium, V 3.85 %
3.85 %
Chemical Properties Metric English Comments
Critical Temperature 840 °C
1540 °F
Ac1
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