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Crucible Steel REX® M7N High Speed Steel, AISI M7
| 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® M7N High Speed Steel, AISI M7.pdf  |
| Price | EMAIL US sales@lookpolymers.com |
Material Notes:
REX M7 is molybdenum type high speed steel designed with higher carbon and vanadium to provide higher hardness after heat treatment and improved wear resistance compared to M1 steel.Information provided by Crucible Industries
| Physical Properties | Metric | English | Comments |
|---|---|---|---|
| Density | 7.94 g/cc | 0.287 lb/in³ |
| Mechanical Properties | Metric | English | Comments |
|---|---|---|---|
| Hardness, Brinell | 229 - 248 | 229 - 248 | |
| Hardness, Rockwell C | 57 @Tempering Temp. 621 °C |
57 @Tempering Temp. 1150 °F |
oil quenched from 2200°F then tempered |
| 60 @Tempering Temp. 607.2 °C |
60 @Tempering Temp. 1125 °F |
oil quenched from 2200°F then tempered | |
| 62 @Tempering Temp. 593 °C |
62 @Tempering Temp. 1100 °F |
oil quenched from 2200°F then tempered | |
| 64 @Tempering Temp. 579.4 °C |
64 @Tempering Temp. 1075 °F |
oil quenched from 2200°F then tempered | |
| 65.2 @Tempering Temp. 566 °C |
65.2 @Tempering Temp. 1050 °F |
oil quenched from 2200°F then tempered | |
| 66 @Tempering Temp. 538 °C |
66 @Tempering Temp. 1000 °F |
oil quenched from 2200°F then tempered | |
| 66 @Tempering Temp. 551.7 °C |
66 @Tempering Temp. 1025 °F |
oil quenched from 2200°F then tempered | |
| Modulus of Elasticity | 207 GPa | 30000 ksi |
| Thermal Properties | Metric | English | Comments |
|---|---|---|---|
| CTE, linear | 9.61 µm/m-°C @Temperature 37.8 - 260 °C |
5.34 µin/in-°F @Temperature 100 - 500 °F |
|
| 11.4 µm/m-°C @Temperature 37.8 - 427 °C |
6.35 µin/in-°F @Temperature 100 - 800 °F |
||
| 12.3 µm/m-°C @Temperature 37.8 - 538 °C |
6.81 µin/in-°F @Temperature 100 - 1000 °F |
| Component Elements Properties | Metric | English | Comments |
|---|---|---|---|
| Carbon, C | 1.0 % | 1.0 % | |
| Chromium, Cr | 3.75 % | 3.75 % | |
| Iron, Fe | 82 % | 82 % | as balance |
| Manganese, Mn | 0.30 % | 0.30 % | |
| Molybdenum, Mo | 8.75 % | 8.75 % | |
| Silicon, Si | 0.40 % | 0.40 % | |
| Tungsten, W | 1.75 % | 1.75 % | |
| Vanadium, V | 2.0 % | 2.0 % |
| Chemical Properties | Metric | English | Comments |
|---|---|---|---|
| Critical Temperature | 832 °C | 1530 °F |
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