MIG Brazing Wire C9 CuSi3 – 5kg 0.8mm Copper Silicon Spool

This MIG Brazing Wire C9 (CuSi3Mn1) is a high-quality copper silicon brazing wire designed for automotive and sheet metal applications where low heat input and corrosion resistance are essential.

Commonly used by UK car bodyshops, fabrication workshops and vehicle repair specialists, this wire is ideal for MIG brazing galvanised steel, zinc-coated panels and high-strength Boron steels.

Because MIG brazing operates at a lower temperature than conventional steel welding, it significantly reduces distortion and helps preserve the mechanical properties of modern high-strength automotive steels.

Shielding Gas: Pure Argon Required
Supplied on a 5kg spool 0.8MM Diameter

Other diameters and spool sizes are available – give us a call on 028 9046 0541

Key Applications

• Automotive body panel repair

• Boron steel brazing

• Galvanised and zinc-coated steel

• Thin sheet metal fabrication

• Artistic and decorative copper alloy work

Benefits of C9 MIG Brazing Wire

Lower Heat Input

The reduced melting point (980°C) minimises panel distortion and burn-through on thin automotive steel.

Maintains Base Metal Strength

As the parent metal is not fully melted, tensile strength in high-strength steels is preserved — essential for safety-critical vehicle structures.

Excellent Corrosion Resistance

The copper-silicon composition protects galvanised coatings and improves long-term durability.

Clean, Smooth Finish

Produces low-spatter, bright copper-toned welds requiring minimal finishing.

Strong Gap Bridging Performance

Excellent wetting and flow characteristics make it ideal for thin or dissimilar materials.

Remember Health and Safety is important when welding, please see HSE welding safety recommendations before welding.