CK-45

CK-45 Grade Introduction:

Carbon Steel CK 45 is suitable for mean strained parts of higher dimensions (heavy forged parts) and complexed forms in vehicle manufacturing and machine engineering (e.g. ship shafts, transmission parts, wheel hubs). Lowest application temp. -25 °C, favorable creep behavior up to 480 °C.

CK-45 Grade Application:

  • Cutting Tools: Suitable for manufacturing various strong cutting tools that are wear-resistant and impact-resistant.
  • Used for making:Scrapers
  • Serrated knives
  • Iron knives
  • Drill bits
  • Forging industry: forging die.
  • Screw industry: heading forming mold, such as teeth, punch.

CK-45 Equivalent Grades:

Standard German Japan China ISO
ASTM A681 DIN 17350 JIS G4403 GB/T 1299 ISO 4957
1045 CK45 S45C 45 C45E4

CK-45 Chemical Composition:

Element C Si Mn P S
Content (%) 0.42-0.5 0.4 0.5-0.8 0.04 0.03

Mechanical Properties:

Property Value Condition
Elastic Modulus 217 GPa -100 °C
Elongation 4 - 8 % 20 °C
Poisson’s Ratio 0.29 [-] 20 °C
Shear Modulus 75 – 80 GPa 20 °C
Tensile Strength 580 – 770 MPa 20 °C
Yield Strength 330 – 640 MPa 20 °C

Physical Properties:

Property Value Unit
Thermal Expansion Coefficient 10 – 10 e-6/K
Thermal Conductivity 25 – 25 W/m·K
Specific Heat 460 – 460 J/kg·K
Melting Temperature 1450 – 1510 °C
Density 7700 – 7700 kg/m³

Thermal Properties:

Property Value Condition
Coefficient of Thermal Expansion 1.08E-5 1/K -100 °C
Thermal Conductivity 41.7 W/(m·K) 20 °C
Thermal Diffusivity 11.6 mm²/s 20 °C

Forging Properties:

At first, Pre-Heating to 552℃，Then heat to forged temperature. Next, Soak at 820-870 °C , ensure heat thorough. Then start forged, the forged temperature no low than 560℃. After forging, cool slowly.

Stress Relieving:

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