LEADING COPPER NICKEL 90/10 & 70/30 PIPES, TUBES & CUNIFER BRAKE LINE COIL MANUFACTURER
Manufacturer, Exporter & Supplier of Copper-Nickel 90/10 & 70/30 Pipes, Tubes & CuNiFer Brake Line Coils
Why Copper-Nickel-Iron (CuNiFer) brake line coils outperform conventional steel brake tubing in corrosion resistance and formability — and why automotive OEMs worldwide are increasingly specifying it.
CuNiFer — short for Copper-Nickel-Iron, and also referred to as 90/10 CuNiFe — is a copper-base alloy nominally composed of ~88% copper, 9–11% nickel, with controlled iron and manganese additions for strength and corrosion resistance. It shares its core chemistry with Copper-Nickel 90/10 (UNS C70600) piping alloy, but is processed and sized specifically as small-diameter coiled tubing for automotive hydraulic brake and fuel line applications.
Conventional steel brake lines, even when zinc-plated or coated, are vulnerable to corrosion over time — particularly in regions that use road salt for winter de-icing, or in coastal/humid climates. Once the protective coating is breached (by a stone chip, abrasion, or simply age), the underlying steel begins to rust from the inside and outside. Because brake lines are thin-walled and carry the vehicle's hydraulic brake fluid under pressure, this corrosion can progress to a pinhole leak or a sudden line rupture — a genuine safety hazard. This corrosion-driven failure mode is one of the most common reasons brake lines are flagged in vehicle safety inspections.
| Property | Steel (coated) | Stainless Steel | CuNiFer (90/10 CuNiFe) |
|---|---|---|---|
| Corrosion Resistance | Moderate — coating-dependent | Good | Excellent |
| Formability / Double-Flaring | Moderate — can crack | Difficult — work-hardens | Excellent |
| Cost | Low | High | Moderate |
| Typical Service Life | 10–15 years (climate-dependent) | 15–20+ years | 20+ years |
| Ease of Field Repair | Moderate | Difficult | Easy |
CuNiFer brake line coils are manufactured as seamless tube, typically from 4.75mm (3/16") up to 12mm (1/2") OD, supplied in standard coil lengths such as 7.5m, 15m and 30m. They are sized and wall-thicknessed to handle automotive hydraulic brake system pressures with a substantial safety margin, and are equally suited to fuel lines, transmission oil cooler lines and hydraulic clutch lines.
Many European vehicle manufacturers began specifying CuNiFer brake lines from the 1990s onward, following widespread corrosion-related steel brake-line failures — particularly in regions with heavy winter road-salt use. Today, CuNiFer is widely recognised as the preferred upgrade material for both OEM production and aftermarket brake line replacement, especially for vehicles operating in corrosive or coastal environments.
CuNiFer (Copper-Nickel-Iron) brake line tubing is made from a 90/10 CuNiFe alloy — nominally 88% copper, 10% nickel, with controlled iron and manganese additions for strength and corrosion resistance.
Yes. CuNiFer does not rust, resists road salt and brake fluid corrosion far better than steel, and is easier to bend and double-flare during installation, while meeting the same pressure and performance requirements per SAE J527.
European manufacturers began specifying CuNiFer from the 1990s onward after widespread corrosion-related steel brake-line failures, particularly in regions using heavy road salt, driven by safety and warranty concerns.
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