Equivalent Materials
European EN standard equivalents include C45, C45K, and CK45. These materials share similar chemical compositions and mechanical properties:
- Carbon content: 0.42-0.50% range
- Tensile strength: 570-700 MPa
- Brinell hardness: 170-210
- Similar machinability and weldability characteristics
Characteristics
1045 steel exhibits excellent machinability in both hot-rolled and normalized conditions. When welding, low-hydrogen electrodes should be used with post-weld stress relief at 550 C - 660 C. The material provides a practical balance between strength and cost-effectiveness, though it has limitations including low hardenability and inadequate nitriding response.
Heat treatment techniques optimize mechanical properties: quenching and tempering enhance strength and toughness; annealing improves machinability and reduces internal stress; flame hardening increases surface hardness for wear resistance; induction hardening provides a hardened surface while maintaining a ductile core.
Uses
- Axles
- Bolts
- Connecting rods
- Hydraulic clamps and rams
- Pins
- Rolls
- Studs
- Shafts
- Spindles
Mechanical Properties
Hardness range: 170-210 Brinell. Tensile strength range: 570-700 MPa.
| Grade | Condition | Ultimate Strength (ksi/MPa) | Yield Strength (ksi/MPa) | Elongation % | Rockwell Hardness |
|---|---|---|---|---|---|
| 1045 | HR (Hot Rolled) | 75/517 | 45/310 | 15 | 80 B |
| 1045 | CW (Cold Worked) | 90/621 | 80/552 | 5 | 90 B |
| 1045 | SR (Stress Relieved) | 80/552 | 70/483 | 8 | 85 B |
| 1045 | A (Annealed) | 65/448 | 35/241 | 20 | 72 B |
| 1045 | N (Normalized) | 75/517 | 48/331 | 15 | 80 B |
Chemical Composition
| Grade | Carbon % | Manganese % | Phosphorus max % | Sulfur max % |
|---|---|---|---|---|
| 1045 | 0.43-0.50 | 0.60-0.90 | 0.040 | 0.050 |
