# Copper Clad Steel Wire

> IACS 21% – 55% · ASTM B452 · 0.10 – 4.00 mm

Copper bonded to steel. That's the whole idea. Except our cladding doesn't peel, crack, or thin out at the radius — because we don't electroplate after drawing. The bond is metallurgical. Formed at temperature. Continuous process, reel to reel. If your CATV drop, overhead ground, or 5G tower harness has ever failed because the copper separated from the core, you weren't running ours.

## Key Features

- **Four grades. One phone call.**: 21% IACS for lightning arrest and high-tension ground. 30% for substation grids and messenger. 40% for coax center conductors. 55% for automotive harness that needs to carry RF without the weight of solid copper. Tell us the application — we'll tell you the grade.
- **The bond isn't glued. It's grown.**: Continuous molten-copper cladding. Steel wire passes through a bath of liquid copper at 1120°C. Oxygen-free interface. No flux, no filler, no intermediate layer. When you look at the cross-section under a microscope, you can't tell where the steel ends and the copper begins.
- **ASTM B452 traceability to heat and lot.**: Each reel ships with a cert that traces back to the heat number and the hour it ran. When your QA auditor shows up at 7am unannounced — ours do that, by the way — you can hand them the binder and go get coffee.

## Technical Data

| Parameter | Value |
|---|---|
| Conductivity | 21 / 30 / 40 / 55% IACS |
| Diameter range | 0.10 – 4.00 mm |
| Diameter tolerance | ±0.003 mm to ±0.020 mm |
| Copper cladding thickness | ≥ 10% by volume (all grades) |
| Tensile strength | 600 – 1400 MPa (grade-dependent) |
| Elongation (min) | 1.0 – 15% |
| Elastic modulus | 150 – 200 GPa |
| Density | 8.15 g/cm³ |

## IACS Grades

| Grade | IACS | Tensile | Application |
|---|---|---|---|
| CCS 21% | 21% | 1200 - 1400 MPa | Overhead ground, lightning arrest |
| CCS 30% | 30% | 900 - 1100 MPa | Substation grounding, CATV messenger |
| CCS 40% | 40% | 700 - 900 MPa | Coaxial center conductor, CATV drop |
| CCS 55% | 55% | 600 - 800 MPa | High-frequency RF, automotive harness |