AISI 1045 is a medium-carbon steel offering a useful combination of strength, toughness, machinability, and wear resistance. It is commonly used for shafts, axles, gears, pins, and general engineering components.
AISI 1045 is a medium-carbon engineering steel widely used in mechanical and industrial applications where greater strength and hardness potential are required than in low-carbon steels. Its carbon content allows it to respond to suitable heat treatments, making it appropriate for components that require improved mechanical performance and resistance to wear.
The material is frequently used to manufacture transmission shafts, axles, gears, rollers, pins, machine components, and structural parts. Depending on the supplied condition and processing method, AISI 1045 can be machined and heat-treated to meet specific engineering requirements. Material selection should account for the required hardness, strength, section size, and operating environment. Typical Applications: Shafts, axles, gears, rollers, pins, machinery components, and industrial equipment.Final chemical, mechanical properties, dimensions and tolerances are confirmed against the governing specification and purchase order.
| Element | Min (%) | Max (%) |
|---|---|---|
| Carbon (C) | 0.43% | 0.50% |
| Manganese (Mn) | 0.60% | 0.90% |
| Phosphorus (P) | — | 0.040% |
| Sulfur (S) | — | 0.050% |
| Silicon (Si) | 0.15% | 0.35% |
| Iron (Fe) | Balance | Balance |
| Property | Metric Value | Imperial Value |
|---|---|---|
| Tensile Strength (Ultimate) | 570 – 700 MPa | 82,700 – 101,500 psi |
| Yield Strength | 310 – 450 MPa | 45,000 – 65,000 psi |
| Elongation at Break (in 50 mm) | 16% – 20% | 16% – 20% |
| Reduction of Area | 40% – 45% | 40% – 45% |
| Hardness (Brinell - HBW) | 163 – 217 HB | 163 – 217 HB |
| Hardness (Rockwell B - HRB) | 84 – 95 HRB | 84 – 95 HRB |
| Modulus of Elasticity (Young's | ) 200 GPa | 29,000 ksi |
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
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