SAE/AISI 1345 Carbon Steel (UNS G13450)
SAE/AISI 1345 is a medium-carbon steel prized for its excellent strength, hardenability, and machinability. It offers reliable performance in various industrial applications while remaining cost-effective and widely accessible, making it a practical choice for engineers and manufacturers.
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| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Iron | 97.2% | 97.8% |
| Carbon | 0.43% | 0.48% |
| Manganese | 1.60% | 1.90% |
| Phosphorous | —— | 0.035% |
| Silicon | 0.15% | 0.35% |
| Sulfur | —— | 0.04% |
The following table provides a list of SAE/AISI 1345 properties in both SI and US customary/Imperial units.
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| Physical Properties | Metric |
|---|---|
| Density | 7850 kg/m3 |
| Mechanical Properties | Metric |
| Young’s Modulus (E) | 190 - 210 GPa |
| Bulk Modulus (K) | 140 GPa |
| Shear Modulus (G) | 80 GPa |
| Poisson’s Ratio (ν) | 0.27 - 0.30 |
| Brinell Hardness | 180 - 240 |
| Thermal Properties | Metric |
| Thermal Conductivity | 50 W/m·K |
| Specific Heat Capacity (Cp) | 470 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 1.2×10-5 1/°C |
| Electrical Properties | Metric |
| Electrical Conductivity | 4.18×106 S/m |
| Electrical Resistivity | 2.4×10-7 Ω·m |
The values in this table are approximate and can vary depending on various factors such as the specific manufacturing process and heat treatment applied to the alloy.
Advantages & Disadvantages of 1345 Carbon Steel
| Advantages | Disadvantages |
|---|---|
| High strength | Low ductility |
| Good machinability | Susceptible to corrosion |
| Good weldability | |
| Wide range of applications |
Applications of 1345 Carbon Steel
1345 carbon steel is a versatile material that can be used in a wide range of applications, including:
- Machinery and equipment: Used in engines, pumps, compressors, and structural frames of machinery.
- Structural components: Utilized in beams, columns, trusses, and construction of bridges and buildings.
- Automotive parts: Applied in axles, crankshafts, connecting rods, car bodies, and other automotive components.
- Tools and dies: Suitable for cutting tools, stamping dies, forging dies, machine tools, and precision equipment.
- Pipelines: Employed in oil, gas, and water pipelines, as well as corrosion-resistant structures.
- Bearings: Used in ball, roller, and needle bearings, and other strength-demanding components.
- Springs: Applied in compression, extension, torsion springs, and other flexible yet strong components.
- Wire: Used for electrical, welding, reinforcing wire, and components requiring strength and conductivity.