Aluminum Welding Rods - 5% Silicon (Si)

Our reliable aluminum welding rod with 5% silicon is the most widely used filler material for gas welding a broad spectrum of aluminum alloys. The silicon content is added to give the melt fantastic fluidity and drastically reduce the risk of solidification cracking during cooling.

This rod is the natural choice for those seeking an easy-to-handle, highly fluid melt, especially for castings repairs or when joining sheets where tightness and a beautiful finish are top priorities.

Properties and benefits:

• Exceptional fluidity: The high silicon content lowers the melting point and makes the weld pool extremely fluid, making it easy to create smooth and clean transitions.
• Crack resistance: Silicon minimizes the material's shrinkage during solidification, which drastically reduces the risk of hot cracking in the weld.
• Leak-proof joints: Very good ability to penetrate and seal, making it ideal for liquid containers, pump housings, and pipes.
• Easy to work with: A forgiving welding rod that is easy to handle even during more complex repairs.

Important for a successful result: For gas welding in aluminum, our aluminum flux must be used. This is to break down the tough oxide layer and allow the silicon alloy to flow out and fuse perfectly with the base material.

Specifications & Sizes:

This rod is stocked in a heavy-duty dimension that covers most needs in aluminum gas welding:

• Dimensions: 3.2 mm diameter (Length: 1000 mm).
• Packaging: Choose between 0.5 kg and 1.0 kg.
• Alloy: Aluminum with 5% Silicon (Si).
• Welding method: Oxy-acetylene welding.

Pro tip: Warm the end of the rod and dip it into the aluminum flux. By quickly heating the flux on the rod so that it melts and flows down along the rod, you can weld longer distances with a steady and even flow of flux without interruption.