DIN 17222 Grade Ck85 cold rolled and hardened
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DIN 17222 Grade Ck85 cold rolled and hardened

DIN 17222 Grade Ck85 cold rolled and hardened introduction

The steel Ck 85 is used as cold rolled steel strip for springs with high dimensional accuracy and surface condition up to 2.5 mm thicknesses.

Equivalent material: GB 85, BS CS80, GOST 85A, ISO CS85, UNI C90, JIS SK5-CSP, SAE 1086, DIN 1.1269, DIN C85S, AFNOR C85S, AFNOR XC90, AFNOR C90RR, BS C85S, BS 80HS, BS 80CS, AISI 1086, JIS SK85-CSP, JIS SWRH82A, EN C85S, EN 1.1269, ISO C85S, GOST 85, GB/T 85, GB/T U20852, UNS G10860

DIN 17222 Grade Ck85 cold rolled and hardened general

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

DIN 17222 Grade Ck85 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 Ck85 cold rolled and hardened chemical

Property Value
Carbon Carbon of 0.8 - 0.9 %
Manganese Manganese of 0.45 - 0.65 %
Phosphorus Phosphorus of 0.04 %
Silicon Silicon of 0.15 - 0.35 %
Sulfur Sulfur of 0.035 %

DIN 17222 Grade Ck85 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 Ck85 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 730 [-] -
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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