EN 10277-5 Grade 38Cr2 cold drawn

EN 10277-5 Grade 38Cr2 cold drawn

EN 10277-5 Grade 38Cr2 cold drawn introduction

Steel 38 Cr 2 is suitable for a little higher strained parts of lower dimension in vehicle manufacturing, engine and machine engineering (e.g. transmission parts, axles, shafts). Lowest application temp. -25 °C.

Equivalent material: NBN 38Cr2, AFNOR 38C2, BS 128M36, UNI 38Cr2, DIN 1.7003, AFNOR 38Cr2, BS 38Cr2, AISI 5140, SAE 5140, EN 38Cr2, EN 1.7003, ISO 37Cr2E, UNS G51400

EN 10277-5 Grade 38Cr2 cold drawn general

Property Temperature Value
Density 20.0 °C Density of 7.8 g/cm³

EN 10277-5 Grade 38Cr2 cold drawn thermal

Property Temperature Value Comment
Coefficient of thermal expansion -100.0 °C Coefficient of thermal expansion of 1.08E-5 1/K -
- 20.0 °C Coefficient of thermal expansion of 1.19E-5 1/K -
- 100.0 °C Coefficient of thermal expansion of 1.25E-5 1/K -
- 200.0 °C Coefficient of thermal expansion of 1.3E-5 1/K -
- 300.0 °C Coefficient of thermal expansion of 1.36E-5 1/K -
- 400.0 °C Coefficient of thermal expansion of 1.41E-5 1/K -
- 500.0 °C Coefficient of thermal expansion of 1.45E-5 1/K -
- 600.0 °C Coefficient of thermal expansion of 1.49E-5 1/K -
Max service temperature, long - Max service temperature, long of -25 - 0 °C -
Melting point - Melting point of 1382 - 1529 °C Typical for Chromium 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 44.9 W/(m·K) -
- 100.0 °C Thermal conductivity of 46.2 W/(m·K) -
- 200.0 °C Thermal conductivity of 45.5 W/(m·K) -
- 300.0 °C Thermal conductivity of 43.1 W/(m·K) -
- 400.0 °C Thermal conductivity of 40.4 W/(m·K) -
- 500.0 °C Thermal conductivity of 37.7 W/(m·K) -
- 600.0 °C Thermal conductivity of 34.9 W/(m·K) -
Thermal diffusivity 20.0 °C Thermal diffusivity of 12.5 mm²/s -
- 100.0 °C Thermal diffusivity of 12 mm²/s -
- 200.0 °C Thermal diffusivity of 11 mm²/s -
- 300.0 °C Thermal diffusivity of 9.8 mm²/s -
- 400.0 °C Thermal diffusivity of 8.6 mm²/s -
- 500.0 °C Thermal diffusivity of 7.3 mm²/s -
- 600.0 °C Thermal diffusivity of 5.9 mm²/s -

EN 10277-5 Grade 38Cr2 cold drawn chemical

Property Value
Carbon Carbon of 0.35 - 0.42 %
Chromium Chromium of 0.4 - 0.6 %
Manganese Manganese of 0.5 - 0.8 %
Phosphorus Phosphorus of 0.04 %
Silicon Silicon of 0.4 %
Sulfur Sulfur of 0.03 %

EN 10277-5 Grade 38Cr2 cold drawn electrical

Property Temperature Value
Electrical resistivity 20.0 °C Electrical resistivity of 2.32E-7 Ω·m
- 100.0 °C Electrical resistivity of 2.77E-7 Ω·m
- 200.0 °C Electrical resistivity of 3.47E-7 Ω·m
- 300.0 °C Electrical resistivity of 4.35E-7 Ω·m
- 400.0 °C Electrical resistivity of 5.38E-7 Ω·m
- 500.0 °C Electrical resistivity of 6.56E-7 Ω·m
- 600.0 °C Electrical resistivity of 7.95E-7 Ω·m

EN 10277-5 Grade 38Cr2 cold drawn mechanical

Property Temperature Value
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 [-]
Tensile strength 20.0 °C Tensile strength of 820 - 880 MPa

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