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Grade Cq15 Cold-Drawn Steel – Spheroidized Carbides, Annealed, Slightly Skin-Passed

The cold-upsettable steel Cq 15 is suitable for the manufacture of screws, nuts and small parts (valve spring plates, bearing sleeves) used in automobile, motor and equipment construction and in general engineering. For lower requirements and smaller sections, carbon steel is sufficient if the requirements for strength increase and for larger dimensions, alloyed steel of sufficient hardenability must be used.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.85 g/cm³

Mechanical

PropertyTemperatureValue

Elastic modulus

-100.0 °C

217 GPa

20.0 °C

212 GPa

100.0 °C

207 GPa

200.0 °C

199 GPa

300.0 °C

192 GPa

400.0 °C

184 GPa

500.0 °C

175 GPa

600.0 °C

164 GPa

Poisson's ratio

20.0 °C

0.28 [-]

Reduction of area

20.0 °C

65 %

Tensile strength

20.0 °C

470 - 490 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

-100.0 °C

1.08E-5 1/K

20.0 °C

1.19E-5 1/K

100.0 °C

1.25E-5 1/K

200.0 °C

1.3E-5 1/K

300.0 °C

1.36E-5 1/K

400.0 °C

1.41E-5 1/K

500.0 °C

1.45E-5 1/K

600.0 °C

1.49E-5 1/K

Melting point

1480 - 1526 °C

Typical for Low Carbon Steel

Specific heat capacity

-100.0 °C

423 J/(kg·K)

20.0 °C

461 J/(kg·K)

100.0 °C

479 J/(kg·K)

200.0 °C

499 J/(kg·K)

300.0 °C

517 J/(kg·K)

400.0 °C

536 J/(kg·K)

500.0 °C

558 J/(kg·K)

600.0 °C

587 J/(kg·K)

Thermal conductivity

20.0 °C

56.9 W/(m·K)

100.0 °C

56.4 W/(m·K)

200.0 °C

53.5 W/(m·K)

300.0 °C

49.4 W/(m·K)

400.0 °C

45.2 W/(m·K)

500.0 °C

41.3 W/(m·K)

600.0 °C

37.6 W/(m·K)

Thermal diffusivity

20.0 °C

15.7 mm²/s

100.0 °C

14.5 mm²/s

200.0 °C

12.9 mm²/s

300.0 °C

11.2 mm²/s

400.0 °C

9.6 mm²/s

500.0 °C

7.9 mm²/s

600.0 °C

6.3 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

1.83E-7 Ω·m

100.0 °C

2.27E-7 Ω·m

200.0 °C

2.95E-7 Ω·m

300.0 °C

3.8E-7 Ω·m

400.0 °C

4.81E-7 Ω·m

500.0 °C

5.99E-7 Ω·m

600.0 °C

7.38E-7 Ω·m

Magnetic

PropertyValueComment

Curie temperature

770 °C

Typical for Low Carbon Steel

Chemical properties

PropertyValue

Carbon

0.12 - 0.18 %

Manganese

0.3 - 0.6 %

Phosphorus

0.04 %

Silicon

0.4 %

Sulfur

0.035 %


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