DIN 1652-3 Grade 20MoCr4 cold-drawn or peeled and treated to ferrite-pearlite structure
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DIN 1652-3 Grade 20MoCr4 cold-drawn or peeled and treated to ferrite-pearlite structure

DIN 1652-3 Grade 20MoCr4 cold-drawn or peeled and treated to ferrite-pearlite structure introduction

The steel 20 MoCr 4 respectively 20 MoCr 5 (mat. no. 1.7321) is used for wear loaded parts in the vehicle and mechanical engineering with medium core strength, high toughness and high fatigue strength (e.g. gears, shafts, axles).
The lowest application amounts to -60 °C, the best application up to 60 mm nominal size.

Equivalent material: NBN 20MoCr4, BS 805M20, JIS SNCM220, SS 2506-03, UNE F.1523-20MoCr4, DIN 1.7321, AFNOR 20MoCr4, BS 20MoCr4, AISI 4118H, AISI 4118, SAE 4118H, SAE 4118, EN 20MoCr4, EN 1.7321, GB/T B10200, GB/T G20CrMo, GB/T 20CrMo, ASTM 4118H, ASTM 4118, UNS H41180, UNS G41180

DIN 1652-3 Grade 20MoCr4 cold-drawn or peeled and treated to ferrite-pearlite structure general

Property Temperature Value
Density 20.0 °C Density of 7.83 g/cm³

DIN 1652-3 Grade 20MoCr4 cold-drawn or peeled and treated to ferrite-pearlite structure 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 -
Max service temperature, long - Max service temperature, long of -60 - 0 °C -
Melting point - Melting point of 1382 - 1529 °C Typical for Chromium Molybdenum 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 41 W/(m·K) -
- 100.0 °C Thermal conductivity of 42.7 W/(m·K) -
- 200.0 °C Thermal conductivity of 42.8 W/(m·K) -
- 300.0 °C Thermal conductivity of 41.6 W/(m·K) -
- 400.0 °C Thermal conductivity of 39.9 W/(m·K) -
- 500.0 °C Thermal conductivity of 37.8 W/(m·K) -
- 600.0 °C Thermal conductivity of 35.6 W/(m·K) -
Thermal diffusivity 20.0 °C Thermal diffusivity of 11.4 mm²/s -
- 100.0 °C Thermal diffusivity of 11 mm²/s -
- 200.0 °C Thermal diffusivity of 10.3 mm²/s -
- 300.0 °C Thermal diffusivity of 9.5 mm²/s -
- 400.0 °C Thermal diffusivity of 8.5 mm²/s -
- 500.0 °C Thermal diffusivity of 7.3 mm²/s -
- 600.0 °C Thermal diffusivity of 6 mm²/s -

DIN 1652-3 Grade 20MoCr4 cold-drawn or peeled and treated to ferrite-pearlite structure chemical

Property Value
Carbon Carbon of 0.17 - 0.22 %
Chromium Chromium of 0.3 - 0.6 %
Manganese Manganese of 0.7 - 1 %
Molybdenum Molybdenum of 0.4 - 0.5 %
Phosphorus Phosphorus of 0.04 %
Silicon Silicon of 0.4 %
Sulfur Sulfur of 0.035 %

DIN 1652-3 Grade 20MoCr4 cold-drawn or peeled and treated to ferrite-pearlite structure electrical

Property Temperature Value
Electrical resistivity 20.0 °C Electrical resistivity of 2.54E-7 Ω·m
- 100.0 °C Electrical resistivity of 3E-7 Ω·m
- 200.0 °C Electrical resistivity of 3.69E-7 Ω·m
- 300.0 °C Electrical resistivity of 4.51E-7 Ω·m
- 400.0 °C Electrical resistivity of 5.45E-7 Ω·m
- 500.0 °C Electrical resistivity of 6.54E-7 Ω·m
- 600.0 °C Electrical resistivity of 7.78E-7 Ω·m

DIN 1652-3 Grade 20MoCr4 cold-drawn or peeled and treated to ferrite-pearlite structure 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 -
Hardness, Brinell 20.0 °C Hardness, Brinell of 140 - 187 [-] -
Poisson's ratio 23.0 °C Poisson's ratio of 0.29 [-] Typical for Chromium Molybdenum Steel

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