C45
C45 Steel Applications:
| Application |
|---|
| Automotive Parts |
| Gears |
| Pinions |
| Shaftings |
| Axles |
| Crankshafts |
| Connecting Rods |
| Bolts & Studs |
| Hydraulic Components |
| Machine Parts |
C45 Steel Equivalent Grades:
| Country | Standard | Grade |
|---|---|---|
| USA | ASTM A29 | 1045 |
| British | EN 10083-2 | C45 / 1.1191 |
| Japan | JIS G4051 | S45C |
| Australia | AS 1442 | 1045 |
| Germany | DIN 17200 | CK45 |
| France | NFA 33-101 | AF65-C45 |
| China | GB/T 699 | 45# |
| Russia | GOST 1050 | 45 |
C45 Steel Additional Grades (Similar Steels)
| Additional 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, DIN 1.2714, P20, P20+S, P20+Ni, SCM420, ASTM SA-36, ASTM SA-105, SAE 1018, SAE 4140, SAE 8620, 16MnCr5, 20MnCr5, C20, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55Mn75, SAE 52100, S40C, S355J2G3. |
C45 Steel Chemical Composition:
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.42 – 0.50 |
| Manganese (Mn) | 0.60 – 0.90 |
| Silicon (Si) | ≤ 0.40 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.050 |
| Chromium (Cr) | ≤ 0.40 |
| Molybdenum (Mo) | ≤ 0.10 |
| Nickel (Ni) | ≤ 0.40 |
| Iron (Fe) | Balance |
C45 Steel Mechanical Properties:
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 570 – 700 MPa | 82,700 – 101,500 psi |
| Yield Strength | 310 MPa | 44,900 psi |
| Elongation at Break | 16% | 16% |
| Reduction of Area | 40% | 40% |
| Brinell Hardness (HBW) | 170 – 210 | 170 – 210 |
| Rockwell Hardness (HRC) | 20 – 25 | 20 – 25 |
| Impact Strength (Charpy) | 35 J | 25.8 ft-lb |
C45 Steel Heat Treatment:
| Heat Treatment | Temperature Range (°C) | Process Details |
|---|---|---|
| Normalizing | 850 – 900°C | Air cooling |
| Annealing | 650 – 700°C | Slow cooling in furnace |
| Hardening | 820 – 860°C | Water / oil quenching |
| Tempering | 550 – 660°C | Air cooling to desired hardness |
C45 Steel Forging Process:
| Process | Details |
|---|---|
| Initial Forging Temperature | 1150 – 1200°C |
| Final Forging Temperature | 850 – 900°C |
| Cooling Method | Slow cooling after forging to avoid cracks |
C45 Steel Physical Properties:
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
| Melting Point | 1,510°C | 2,750°F |
| Specific Heat Capacity | 480 J/kg-K | 0.114 BTU/lb-°F |
| Thermal Conductivity | 46 W/m-K | 26.6 BTU/hr-ft-°F |
| Electrical Resistivity | 0.21 μΩ·m | 0.21 μΩ·m |
Advantages of C45 Steel:
- High strength and wear resistance
- Good machinability
- Good mechanical properties
- Suitable for surface hardening
- Economical compared to alloy steels
Disadvantages of C45 Steel:
- Limited corrosion resistance (not suitable for marine applications)
- Needs heat treatment for higher hardness
- Not ideal for welding (requires preheating)
Applications in Industries:
| Industry | Usage |
|---|---|
| Automotive | Crankshafts, gears, shafts |
| Manufacturing | Machine components, bolts, nuts |
| Construction | Structural steel, hydraulic parts |
| Aerospace | Engine parts, mechanical fittings |
| Agriculture | Tractor parts, axles |
Commonly Available Forms of C45 Steel:
| Form | Available Sizes |
|---|---|
| Round Bars | 10mm to 300mm diameter |
| Flat Bars | 20mm to 200mm width |
| Square Bars | 10mm to 150mm side |
| Sheets / Plates | 5mm to 100mm thickness |
| Forged Blocks | Custom sizes available |
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Conclusion:
C45 steel is a versatile medium carbon steel known for its good mechanical properties, excellent strength, and reasonable wear resistance. It is widely used in automotive, manufacturing, construction, and aerospace industries. Heat treatment can significantly enhance its mechanical properties, making it ideal for high-stress applications like gears, shafts, and hydraulic components.
C45 steel Related Products
SAE 1018, 16MnCr5, 20MnCr5, C20 Steel, C35 Steel, C45 Steel, E350 Steel, EN15 Steel, EN16T Steel, EN16 Steel, EN18 Steel, EN19 Steel, EN24 Steel, EN8D Steel, SR E250BR Steel, E250BR Steel, IS2062 E350, IS2062 E250, SAE 4140, SAE1030, 8.8 Grade Steel, ST52 Steel, 40CR1 Steel, 40CR4 Steel, EN1A Non-Leaded, 8.8T Grade Steel, 10.9 Steel, 10.9T Steel, EN24T Steel.
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