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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
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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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