Silicon Bronze Brazing Filler Rods (ERCuSi-A)

Technical Overview

Silicon bronze brazing filler rods (AWS A5.7 ERCuSi-A) are copper-based alloys containing approximately

2.8 – 4.0% silicon. They are widely used in brazing and braze-welding applications where controlled heat input

and joint integrity are required.

Key Advantages

- Lower working temperature (965-1035°C) reduces distortion and preserves base metal properties

- Excellent wetting and flow characteristics for uniform joints

- Moderate tensile strength (approx. 350MPa)

- Good corrosion resistance in atmospheric environments

Applications

- Automotive body repair

- HVAC brackets and components

- Sheet metal fabrication

- Marine and decorative metalwork

Process Considerations

- Shielding gas: Argon recommended (TIG/MIG)

- Clean surfaces required before brazing

- Prefer lap joint design

- Avoid overheating to maintain flow performance

Why XINXIN WELDING

- Controlled chemical composition

- Tight dimensional tolerance

- Stable melting behavior

- Reliable batch consistency

Contact

Tongling Xinxin Welding Materials Co., Ltd.

Website: https://www.superlionwelding.com/

Email: jasmine@xxhccn.com

WhatsApp: +86 13705623213