Precision CNC Machining for 45# Steel (AISI 1045 / C45) – Strong & Wear-Resistant Parts
45# steel (equivalent to AISI 1045 / DIN C45) is a medium carbon steel with good strength, toughness, and wear resistance. It is widely used for shafts, gears, studs, and structural components where higher strength than low‑carbon steel is required. At Ranglink, we specialize in CNC machining of 45# steel for prototypes and production runs – from simple turned parts to complex milled components.
– Good tensile and yield strength after heat treatment.
– Excellent machinability in normalized or pre‑hardened condition.
– Cost‑effective compared to alloy steels.
– Can be hardened (induction or flame) for wear‑resistant surfaces.
– Widely available in bars, rods, and plates.
Key Properties of 45# Steel (AISI 1045 / C45)
| Property | Value / Rating |
|---|---|
| Tensile strength (as‑rolled) | ≥ 600 MPa |
| Yield strength (as‑rolled) | ≥ 355 MPa |
| Elongation (as‑rolled) | ≥ 16% |
| Hardness (as‑rolled, Brinell) | 170–210 HB |
| Hardness (quenched & tempered) | Up to 55 HRC (surface induction hardening) |
| Density | 7.85 g/cm³ |
| Machinability rating (relative to 1212 steel) | ~65% (good, especially in normalized condition) |
| Weldability | Fair (preheating recommended) |
Our CNC Machining Capabilities for 45# Steel
| Parameter | Specification |
|---|---|
| Max part size (milling) | 1100 × 600 × 500 mm |
| Max turning diameter | Ø230 mm |
| Standard tolerance | ±0.05 mm |
| Precision tolerance | ±0.005 mm (on request) |
| Surface roughness (as machined) | Ra 1.6 μm |
| Lead time (prototypes) | 3 business days |
Processes available: CNC Turning · CNC Milling (3‑axis, 4‑axis, full 5‑axis) · CNC Drilling & Tapping · EDM · Grinding (for precision finish).
Surface Treatment & Post-Processing for 45# Steel
Note: 45# steel is susceptible to rust. For outdoor or high‑humidity applications, specify corrosion protection such as zinc plating, black oxide, or powder coating.
Common Applications of CNC Machined 45# Steel
Quality Assurance
- ISO 9001:2015 certified – audited quality management system.
- Full traceability – material certificates (EN 10204 3.1) and inspection reports.
- Inspection equipment – CMM, hardness tester, calipers, micrometers.
- Every part inspected – we ensure dimensional accuracy and desired mechanical properties.
Why Choose Ranglink for 45# Steel CNC Machining?
Ready to Start Your 45# Steel CNC Project?
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