Precision CNC Machining for Cold Rolled Steel – Smooth, Tight‑Tolerance Carbon Steel Parts
Cold rolled steel is low‑carbon steel that has been processed at room temperature to achieve superior surface finish, tighter dimensional tolerances, and increased strength compared to hot rolled steel. It is widely used for precision brackets, enclosures, panels, and structural components where a clean, smooth surface and consistent dimensions are critical. At Ranglink, we specialize in CNC machining of cold rolled steel for prototypes and production runs.
– Excellent surface finish (smooth, scale‑free).
– Tighter dimensional consistency (better than hot rolled).
– Good machinability (similar to low‑carbon steel).
– Suitable for bending, stamping, and welding.
– Cost‑effective for precision sheet metal and machined parts.
Key Properties of Cold Rolled Steel (Typical Low‑Carbon Grade)
| Property | Value / Rating |
|---|---|
| Tensile strength (typical) | ~400–550 MPa (depending on temper) |
| Yield strength (typical) | ~300–450 MPa |
| Elongation (%) | ~15–25% |
| Hardness (Rockwell B) | ~60–80 |
| Density | 7.85 g/cm³ |
| Machinability rating (relative to 1212 steel) | ~70% (good, use sharp tools and proper feeds) |
| Weldability | Excellent (low carbon content) |
| Corrosion resistance | Low (requires coating/painting for outdoor use) |
Our CNC Machining Capabilities for Cold Rolled 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 · Sheet metal fabrication (laser cutting, bending) · Grinding (for ultra‑smooth finish).
Surface Treatment & Post-Processing for Cold Rolled Steel
Note: Cold rolled steel rusts easily without protection. For outdoor or humid environments, always specify protective coating.
Common Applications of CNC Machined Cold Rolled 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, calipers, micrometers, surface roughness testers.
- Every part inspected – we verify dimensions, surface finish, and edge quality.
Why Choose Ranglink for Cold Rolled Steel CNC Machining?
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