ISO 4957 Grade S2-9-2
ISO 4957 Grade S2-9-2 introduction
Very tough Mo-V-alloyed high speed steel with good cut accuracy and hot hardness.
Application: cutter, spiral drills, tapper, saw tooths
Equivalent material: GB W2Mo9Cr4V2, AFNOR Z100DCWV09-04-02-02, ISO HS2-9-2, UNI HS2-9-2, SS 2782, UNE F.5607, SAE M7, DIN HS2-9-2, DIN 1.3348, AFNOR HS2-9-2, AFNOR 2-9-2, BS HS2-9-2, AISI M7, JIS SKH58, EN HS2-9-2, EN 1.3348, GB/T T62942, GB/T W2Mo9Cr4V2, ASTM Type M7, UNS T11307
ISO 4957 Grade S2-9-2 general
| Property |
Temperature |
Value |
| Density |
20.0 °C |
Density of 8.12 g/cm³ |
ISO 4957 Grade S2-9-2 thermal
| Property |
Temperature |
Value |
Comment |
| Coefficient of thermal expansion |
-100.0 °C |
Coefficient of thermal expansion of 9.6E-6 1/K |
- |
| - |
20.0 °C |
Coefficient of thermal expansion of 1.05E-5 1/K |
- |
| - |
100.0 °C |
Coefficient of thermal expansion of 1.11E-5 1/K |
- |
| - |
200.0 °C |
Coefficient of thermal expansion of 1.16E-5 1/K |
- |
| - |
300.0 °C |
Coefficient of thermal expansion of 1.2E-5 1/K |
- |
| - |
400.0 °C |
Coefficient of thermal expansion of 1.24E-5 1/K |
- |
| - |
500.0 °C |
Coefficient of thermal expansion of 1.27E-5 1/K |
- |
| - |
600.0 °C |
Coefficient of thermal expansion of 1.3E-5 1/K |
- |
| Melting point |
- |
Melting point of 1370 - 1425 °C |
Typical for Tool And Machining Steel |
| Specific heat capacity |
23.0 °C |
Specific heat capacity of 420 - 460 J/(kg·K) |
Typical for Tool And Machining Steel |
| Thermal conductivity |
20.0 °C |
Thermal conductivity of 27.6 W/(m·K) |
- |
| - |
100.0 °C |
Thermal conductivity of 27.9 W/(m·K) |
- |
| - |
200.0 °C |
Thermal conductivity of 27.7 W/(m·K) |
- |
| - |
300.0 °C |
Thermal conductivity of 27.5 W/(m·K) |
- |
| - |
400.0 °C |
Thermal conductivity of 27 W/(m·K) |
- |
| - |
500.0 °C |
Thermal conductivity of 26.6 W/(m·K) |
- |
| - |
600.0 °C |
Thermal conductivity of 26.1 W/(m·K) |
- |
ISO 4957 Grade S2-9-2 chemical
| Property |
Value |
| Carbon |
Carbon of 0.97 - 1.07 % |
| Chromium |
Chromium of 3.5 - 4.2 % |
| Manganese |
Manganese of 0.4 % |
| Molybdenum |
Molybdenum of 8 - 9.2 % |
| Phosphorus |
Phosphorus of 0.03 % |
| Silicon |
Silicon of 0.45 % |
| Sulfur |
Sulfur of 0.03 % |
| Tungsten |
Tungsten of 1.5 - 2 % |
| Vanadium |
Vanadium of 1.8 - 2.2 % |
ISO 4957 Grade S2-9-2 electrical
| Property |
Temperature |
Value |
| Electrical resistivity |
20.0 °C |
Electrical resistivity of 5.24E-7 Ω·m |
| - |
100.0 °C |
Electrical resistivity of 5.81E-7 Ω·m |
| - |
200.0 °C |
Electrical resistivity of 6.64E-7 Ω·m |
| - |
300.0 °C |
Electrical resistivity of 7.51E-7 Ω·m |
| - |
400.0 °C |
Electrical resistivity of 8.44E-7 Ω·m |
| - |
500.0 °C |
Electrical resistivity of 9.41E-7 Ω·m |
| - |
600.0 °C |
Electrical resistivity of 1.04E-6 Ω·m |
ISO 4957 Grade S2-9-2 mechanical
| Property |
Temperature |
Value |
Comment |
| Elastic modulus |
20.0 °C |
Elastic modulus of 224 GPa |
- |
| - |
100.0 °C |
Elastic modulus of 220 GPa |
- |
| - |
200.0 °C |
Elastic modulus of 214 GPa |
- |
| - |
300.0 °C |
Elastic modulus of 207 GPa |
- |
| - |
400.0 °C |
Elastic modulus of 199 GPa |
- |
| - |
500.0 °C |
Elastic modulus of 191 GPa |
- |
| - |
600.0 °C |
Elastic modulus of 180 GPa |
- |
| Hardness, Rockwell C |
20.0 °C |
Hardness, Rockwell C of 58.5 - 68.5 [-] |
- |
| Plane-Strain Fracture Toughnes |
20.0 °C |
Plane-Strain Fracture Toughnes of 10.9 - 19.8 MPa·√m |
- |
| Poisson's ratio |
20.0 °C |
Poisson's ratio of 0.28 [-] |
- |
| Shear modulus |
23.0 °C |
Shear modulus of 79 GPa |
Typical for Tool And Machining Steel |
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