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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 |
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 | Comments |
|---|---|---|---|
| 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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