EN 10132-4 Grade C75S soft annealed or soft annealed and skin passed (+A or +A+LC)

EN 10132-4 Grade C75S soft annealed or soft annealed and skin passed (+A or +A+LC) introduction

The steel C75S is used as cold rolled strip for springs and special applications in thicknesses of up to 6 mm and as tempered cold strip in thicknesses from 0.30 to 3.00 mm. The cold-rolled steel strip for springs possess a very high precision of measurements and very good state of the surface.

Equivalent material: GB 75, GB U20752, IS 75C6, IS 5, ISO CS75, JIS S75CM, GOST 75, GOST 75A, ASTM A684 Grade 1074, AISI 1074, ASTM G10740, DIN Ck75, DIN 1.1248, DIN C75S, AFNOR C75S, AFNOR C75RR, AFNOR XC75, BS 70CS, BS 70HS, BS 060A78, BS C75S, BS CS70, BS 80, AISI 1070, AISI 1075, AISI 1078, SAE 1070, SAE 1075, SAE 1078, SAE 1074, JIS SWRH77B, EN 1.1248, GB/T 75, GB/T U20752, ASTM Grade 1074, ASTM Grade 1070M, UNS G10700, UNS G10750, UNS G10780, UNS G10740

EN 10132-4 Grade C75S soft annealed or soft annealed and skin passed (+A or +A+LC) general

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

EN 10132-4 Grade C75S soft annealed or soft annealed and skin passed (+A or +A+LC) 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 -

EN 10132-4 Grade C75S soft annealed or soft annealed and skin passed (+A or +A+LC) chemical

Property Value
Carbon Carbon of 0.7 - 0.8 %
Chromium Chromium of 0.4 %
Manganese Manganese of 0.6 - 0.9 %
Molybdenum Molybdenum of 0.1 %
Nickel Nickel of 0.4 %
Phosphorus Phosphorus of 0.03 %
Silicon Silicon of 0.15 - 0.35 %
Sulfur Sulfur of 0.025 %

EN 10132-4 Grade C75S soft annealed or soft annealed and skin passed (+A or +A+LC) 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

EN 10132-4 Grade C75S soft annealed or soft annealed and skin passed (+A or +A+LC) 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 -
Elongation A80 20.0 °C Elongation A80 of 15 % -
Hardness, Brinell 20.0 °C Hardness, Brinell of 93 [-] -
Hardness, Vickers 20.0 °C Hardness, Vickers of 200 [-] -
Poisson's ratio 23.0 °C Poisson's ratio of 0.29 [-] Typical for High Carbon Steel
Shear modulus 23.0 °C Shear modulus of 81 GPa Typical for High Carbon Steel
Tensile strength 20.0 °C Tensile strength of 640 MPa -
Yield strength Rp0.2 20.0 °C Yield strength Rp0.2 of 510 MPa -

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