ISO 4957 Grade 31CrV3

ISO 4957 Grade 31CrV3

ISO 4957 Grade 31CrV3 introduction

screwdriver, bils

Equivalent material: STAS 31CrV5, DIN 1.2208, EN 1.2208

ISO 4957 Grade 31CrV3 general

Property Temperature Value
Density 20.0 °C Density of 7.81 g/cm³

ISO 4957 Grade 31CrV3 thermal

Property Temperature Value Comment
Coefficient of thermal expansion -100.0 °C Coefficient of thermal expansion of 1.05E-5 1/K -
- 20.0 °C Coefficient of thermal expansion of 1.15E-5 1/K -
- 100.0 °C Coefficient of thermal expansion of 1.21E-5 1/K -
- 200.0 °C Coefficient of thermal expansion of 1.27E-5 1/K -
- 300.0 °C Coefficient of thermal expansion of 1.32E-5 1/K -
- 400.0 °C Coefficient of thermal expansion of 1.36E-5 1/K -
- 500.0 °C Coefficient of thermal expansion of 1.4E-5 1/K -
- 600.0 °C Coefficient of thermal expansion of 1.44E-5 1/K -
Melting point - Melting point of 1370 - 1425 °C Typical for Tool And Machining Steel
Specific heat capacity -100.0 °C Specific heat capacity of 423 J/(kg·K) -
- 20.0 °C Specific heat capacity of 461 J/(kg·K) -
- 100.0 °C Specific heat capacity of 479 J/(kg·K) -
- 200.0 °C Specific heat capacity of 499 J/(kg·K) -
- 300.0 °C Specific heat capacity of 517 J/(kg·K) -
- 400.0 °C Specific heat capacity of 536 J/(kg·K) -
- 500.0 °C Specific heat capacity of 558 J/(kg·K) -
- 600.0 °C Specific heat capacity of 587 J/(kg·K) -
Thermal conductivity 20.0 °C Thermal conductivity of 39.6 W/(m·K) -
- 100.0 °C Thermal conductivity of 41.6 W/(m·K) -
- 200.0 °C Thermal conductivity of 41.8 W/(m·K) -
- 300.0 °C Thermal conductivity of 40.3 W/(m·K) -
- 400.0 °C Thermal conductivity of 38.2 W/(m·K) -
- 500.0 °C Thermal conductivity of 36 W/(m·K) -
- 600.0 °C Thermal conductivity of 33.6 W/(m·K) -
Thermal diffusivity 20.0 °C Thermal diffusivity of 11 mm²/s -
- 100.0 °C Thermal diffusivity of 10.8 mm²/s -
- 200.0 °C Thermal diffusivity of 10.1 mm²/s -
- 300.0 °C Thermal diffusivity of 9.2 mm²/s -
- 400.0 °C Thermal diffusivity of 8.1 mm²/s -
- 500.0 °C Thermal diffusivity of 7 mm²/s -
- 600.0 °C Thermal diffusivity of 5.7 mm²/s -

ISO 4957 Grade 31CrV3 chemical

Property Value
Carbon Carbon of 0.28 - 0.35 %
Chromium Chromium of 0.4 - 0.7 %
Manganese Manganese of 0.4 - 0.6 %
Phosphorus Phosphorus of 0.03 %
Silicon Silicon of 0.25 - 0.4 %
Sulfur Sulfur of 0.03 %
Vanadium Vanadium of 0.07 - 0.12 %

ISO 4957 Grade 31CrV3 electrical

Property Temperature Value
Electrical resistivity 20.0 °C Electrical resistivity of 2.63E-7 Ω·m
- 100.0 °C Electrical resistivity of 3.08E-7 Ω·m
- 200.0 °C Electrical resistivity of 3.78E-7 Ω·m
- 300.0 °C Electrical resistivity of 4.66E-7 Ω·m
- 400.0 °C Electrical resistivity of 5.69E-7 Ω·m
- 500.0 °C Electrical resistivity of 6.87E-7 Ω·m
- 600.0 °C Electrical resistivity of 8.26E-7 Ω·m

ISO 4957 Grade 31CrV3 mechanical

Property Temperature Value Comment
Elastic modulus -100.0 °C Elastic modulus of 217 GPa -
- 20.0 °C Elastic modulus of 212 GPa -
- 100.0 °C Elastic modulus of 207 GPa -
- 200.0 °C Elastic modulus of 199 GPa -
- 300.0 °C Elastic modulus of 192 GPa -
- 400.0 °C Elastic modulus of 184 GPa -
- 500.0 °C Elastic modulus of 175 GPa -
- 600.0 °C Elastic modulus of 164 GPa -
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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