DIN 17222 Grade C75 cold rolled and hardened
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DIN 17222 Grade C75 cold rolled and hardened

DIN 17222 Grade C75 cold rolled and hardened introduction

The steel C 75 is used as cold rolled steel strip for springs with high dimensional accuracy and surface condition up to 2.5 mm thicknesses.

Equivalent material: GOST 75A, ISO CS75, DIN 1.0605, AFNOR C75, BS 80CS, BS 80HS, AISI 1074, AISI 1075, SAE 1074, SAE 1075, JIS S75CM, EN 42, EN 1.0605, GOST 75, GB/T 75, GB/T U20752, ASTM Grade 1074, UNS G10740, UNS G10750, IS 80C6

DIN 17222 Grade C75 cold rolled and hardened general

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

DIN 17222 Grade C75 cold rolled and hardened 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 - Max service temperature of 500 °C Typical for Carbon Steel
Melting point - Melting point of 1289 - 1478 °C Typical for High Carbon 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 41.7 W/(m·K) -
- 100.0 °C Thermal conductivity of 43.4 W/(m·K) -
- 200.0 °C Thermal conductivity of 43.2 W/(m·K) -
- 300.0 °C Thermal conductivity of 41.4 W/(m·K) -
- 400.0 °C Thermal conductivity of 39.1 W/(m·K) -
- 500.0 °C Thermal conductivity of 36.7 W/(m·K) -
- 600.0 °C Thermal conductivity of 34.1 W/(m·K) -
Thermal diffusivity 20.0 °C Thermal diffusivity of 11.6 mm²/s -
- 100.0 °C Thermal diffusivity of 11.3 mm²/s -
- 200.0 °C Thermal diffusivity of 10.5 mm²/s -
- 300.0 °C Thermal diffusivity of 9.5 mm²/s -
- 400.0 °C Thermal diffusivity of 8.3 mm²/s -
- 500.0 °C Thermal diffusivity of 7.1 mm²/s -
- 600.0 °C Thermal diffusivity of 5.8 mm²/s -

DIN 17222 Grade C75 cold rolled and hardened chemical

Property Value
Carbon Carbon of 0.7 - 0.8 %
Manganese Manganese of 0.6 - 0.8 %
Phosphorus Phosphorus of 0.05 %
Silicon Silicon of 0.15 - 0.35 %
Sulfur Sulfur of 0.045 %

DIN 17222 Grade C75 cold rolled and hardened electrical

Property Temperature Value
Electrical resistivity 20.0 °C Electrical resistivity of 2.5E-7 Ω·m
- 100.0 °C Electrical resistivity of 2.95E-7 Ω·m
- 200.0 °C Electrical resistivity of 3.65E-7 Ω·m
- 300.0 °C Electrical resistivity of 4.53E-7 Ω·m
- 400.0 °C Electrical resistivity of 5.56E-7 Ω·m
- 500.0 °C Electrical resistivity of 6.74E-7 Ω·m
- 600.0 °C Electrical resistivity of 8.13E-7 Ω·m

DIN 17222 Grade C75 cold rolled and hardened mechanical

Property Temperature Value Comment
Elastic modulus -100.0 °C Elastic modulus of 217 GPa -
- 20.0 °C Elastic modulus of 206 - 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, Vickers 20.0 °C Hardness, Vickers of 700 [-] -
Poisson's ratio 23.0 °C Poisson's ratio of 0.29 [-] Typical for High Carbon Steel
Shear modulus 20.0 °C Shear modulus of 78 GPa -

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