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.
Grade Application
Suitable for manufacturing various strong cutting tools with wear-resistant, resistant to impact. Advanced punching die, screw die, the toughness and complicated shape of the punch, etc. Roll cutting tool industry: scraper, serrated knife, iron knives, drill bits, etc.
Forging Industry: Forging Die
Screw industry: heading forming mold, such as teeth, punch.
Equivalent Grades
| USA | German | Japan | China | ISO |
| ASTM A681 | DIN 17350 | JIS G4403 | GB/T 1299 | ISO 4957 |
| 1045 | CK45 | S45C | 45 | C45E4 |
Our Supply Range
We supply to automotive ancillaries and OEM customers. The products we manufacture are used as input for manufacturing of automotive and general engineering components. These components are further assembled into systems fitted in automobiles and other engineering applications.
| Product Type | Size Range |
|---|---|
| Forged Round Bars | 140mm Dia and above |
| Rolled Round Bars | 12mm Dia and above |
| Forged Flat Bars | Thickness: 32mm to 510mm, Width: 65mm to 1050mm |
| Rolled Flat Bars | Thickness: 6mm to 110mm, Width: 25mm to 810mm |
Chemical Composition
The following table shows the chemical composition of CK45 steel:
| Element | C | Si | Mn | P | S |
| Content(%) | 0.42-0.5 | 0.4 | 0.5-0.8 | 0.04 | 0.03 |
Hardness
Hardness, Rockwell C (Water quenched on 820-870°C, 5 minutes): 201~269HB
Heat Treatment
Heat Treatment of AISI 1045 (CK45) followed by furnace cooling at 50ºF (28ºC) per hour, to 1200ºF (650ºC) soaking and air cooling. Hardening of this grade is carried out from an austenitizing temperature of 1475-1550ºF (800-845ºC) and oil or water quenching.
Hardening
Hardening of this grade is carried out from an austenitizing temperature of 1475-1550ºF (800-845ºC) and oil or water quenching.
Flame and induction hardening may be carried out by heating quickly to the desired case depth and quenching in water or oil. This should be followed by a tempering treatment at 300-400ºF (150-200ºC) to reduce stresses in the case without affecting its hardness. A surface hardness of Rc 58 may be obtained by this treatment.
Tempering
Tempering temperature / ℃ : 552
After tempering hardness HRC or higher: 201-269HB.
Normalizing
840-870°C
Machinability
Machinability is good, rated at 80% that of the AISI 1112 alloy used as a 100% machining rated steel.
Annealing
Full annealing of small C1045 forgings is carried out from 1450-1600ºF (790-870ºC) followed by furnace cooling at 50ºF (28ºC) per hour, to 1200ºF (650ºC) soaking and air cooling.
Mechanical Properties
| Elastic modulus | 217 GPa at – 100 °C |
| Elongation | 4 -8 % at 20 °C |
| Poisson’s ratio | 0.29 [-] at 20 °C |
| Shear modulus | 75 – 80 GPa at 20 °C |
| Tensile strength | 580 – 770 MPa at 20 °C |
| Yield strength | 330 – 640 MPa at 20 °C |
Physical Properties
Quantity |
Value |
Unit |
Thermal expansion |
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 |
Resistivity |
0.55 – 0.55 |
Ohm.mm2/m |
Thermal Properties
- Coefficient of thermal expansion α 1.08E-5 1/K at -100 °C
- Thermal conductivity λ 41.7 W/(m·K) at 20 °C
- Thermal diffusivity αdiff 11.6 mm²/s at 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.
Density
Density 7.8 g/cm³ at 20 °C
Supply Cities
Ambattur, Bangalore, Chennai, Chengalpattu, Coimbatore, Dindigul, Guindy, Madurai, Nellore, Hyderabad, Hosur, Tiruvallur, Tirupur, Tuticorin, Andhra Pradesh, Karnataka, Puducherry, Kerala, Kanyakumari, Telangana, Salem, Thanjavur, Trichy, Erode, Vellore, Karur, Nagercoil, Kanchipuram, Karaikudi, Pudukottai, Nagapattinam, Nemili Thiruvanmiyur, Perungudi, Kurichi, Kakkalur, Keelanagachi, Paramakudi, Thandarai, Alathur, Kodur, Mallur, Gangaikondan, Sriperumbudur, Oragadam,Irungattukottai, Vallam Vadagal, Siruseri,Eraiyur, Manapparai, Perundurai, Ranipet, Gummidipoondi, Cheyyar, Manamadurai, Tindivanam , Mappedu , Thervoykandigai , Nilakottai, Shoolagiri, Kurubarapalli, Bargur, Thirumudivakkam, Cuddalore, Pillaipakkam.
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Addition to other grades
MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS, M2, M35, M42, DIN1.2714, P20, P20+S, P20+Ni, SCM420, ASTMSA-36, ASTMSA-105, SAE1018, SAE4140, SAE8620, 16MNCR5, 20MNCR5, C20, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE52100, S40C, S355J2G3.
