Chalco supplies a complete range of aluminum welding and brazing materials for industrial joining applications. Our product portfolio includes welding wire, filler rods, electrodes, brazing sheets, clad materials, flux, and preforms, supporting reliable performance in automotive, heat exchangers, HVAC systems, and general aluminum fabrication.
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Products: Welding wire, MIG wire, TIG filler rods, electrodes
Typical alloys: ER4043, ER5356, ER4943, ER4643, ER5183
Applications: automotive, structural parts, fabrication
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Products: Brazing rods, rings, clad materials, brazing sheets, flux
Typical alloys: 4xxx series aluminum-silicon alloys
Applications: heat exchangers, HVAC, battery cooling systems
These materials are designed for different joining requirements. Welding is used for structural joining requiring high strength, while brazing is preferred for heat exchangers and thermal management systems where controlled melting and precise joint formation are required. For material selection support and project-specific solutions, feel free to contact our team.
Aluminum Welding Materials (Wire, Rods)
Chalco Aluminum offers a complete range of aluminum welding consumables for MIG, TIG, and Stick (SMAW) welding processes.
Aluminum Welding Material Forms
Chalco provides a complete portfolio of aluminum welding consumables for MIG, TIG, and Stick welding. Our product range includes aluminum welding wire, TIG filler rods, and stick welding electrodes for structural, fabrication, and repair applications.
Aluminum Welding Alloys
Chalco offers a range of ER-series aluminum welding alloys designed to meet different strength, corrosion resistance, and application requirements for MIG, TIG, and Stick welding.
- ER4043: Excellent fluidity and crack resistance, suitable for general welding of 6xxx series alloys
- ER5356: High strength and corrosion resistance, widely used for marine and structural welding
- ER4943: Enhanced weld strength compared to ER4043, ideal for automotive and structural components
- ER4643: Heat-treatable alloy providing higher post-weld strength for demanding applications
- ER5183: High toughness and durability, suitable for marine, offshore, and heavy-duty structures
Applications of Aluminum Welding Materials
Aluminum welding materials are used in a wide range of structural and fabrication applications. Different welding alloys are selected based on strength requirements, corrosion resistance, and service conditions.
Automotive structures: ER4043 and ER4943 are commonly used for good weldability and balanced strength in vehicle frames, body structures, and aluminum assemblies.
Structural components and fabrication: ER5356 and ER5183 provide higher strength for load-bearing components such as frames, supports, and industrial aluminum structures.
Marine and offshore: ER5356 and ER5183 offer excellent corrosion resistance for ship structures, offshore platforms, and marine equipment.
General repair and fabrication: ER4043 is widely used for its fluidity and ease of welding in maintenance, workshop repair, and on-site aluminum joining.
Get high-quality aluminum welding materials designed for structural strength, fabrication, and reliable performance across industrial applications.
Aluminum Brazing Materials (Clad sheet Coil, Rods & Flux)
Chalco supplies aluminum brazing materials for heat exchangers and thermal management.
Clad Aluminum Brazing Materials
Clad aluminum materials are the core solution for heat exchanger manufacturing. By combining a high-strength core alloy with a low-melting aluminum-silicon cladding layer, these materials enable efficient brazing, stable joint formation, and consistent thermal performance in large-scale production.
- Forms: brazing sheet, strip, coil, foil
- Cladding alloys: 4343, 4045, 4047 (excellent flowability and brazing performance)
- Core alloys: 3003, 3A11, 6951 (good strength and heat conductivity), 6061
- Corrosion protection: 7072 cladding layer for enhanced corrosion resistance
- Typical structures: 4045/3003/4045, 4045/3003/7072, 4045/6951/4045
Typical clad brazing material forms for different production and application requirements:
Clad aluminum brazing sheet
For automotive radiators, air conditioners, and heat exchangers
Clad aluminum brazing coil / strip
Suitable for HVAC systems and condenser production
Clad aluminum brazing foil
Used for battery cooling and precision thermal systems
Aluminum Brazing Filler Alloys
Chalco provides aluminum-silicon brazing alloys designed for controlled melting range, excellent flowability, and reliable joint formation in various brazing processes.
- 4343: Standard brazing alloy for heat exchangers and clad materials
- 4045: Common cladding alloy for composite brazing sheets and fins
- 4047: High-silicon alloy with excellent fluidity and leak resistance
- 4004: Cladding alloy used to improve corrosion resistance
- 4A13 / 4A17 / 4A43 / 4A45: Specialized brazing alloys with different melting ranges
Aluminum Brazing Rods, Flux & Preforms
For localized brazing, repair, and assembly processes, Chalco provides a complete range of brazing consumables including rods, fluxes, and preformed components.
Standard Aluminum Brazing Rod
Low-Temperature Aluminum Brazing Rod
Flux-Coated Aluminum Brazing Rod
Flux-Cored Aluminum Brazing Rod
Aluminum Brazing Rings & Preforms
Aluminum Brazing Flux
Applications of Aluminum Brazing Materials
Aluminum brazing materials are widely used in thermal management and lightweight systems, supported by Chalco's integrated solutions including clad materials, precision tubes, and brazing consumables.
- Automotive thermal management: Used in radiators, condensers, and EV battery cooling systems, supported by clad brazing sheets, micro-channel tubes, HF welded tubes, Battery cold plate blanks and complete heat exchanger material solutions.
- Power electronics cooling: Applied in inverters, IGBT modules, and liquid cooling plates, supported by high-precision clad materials and brazing filler rods for reliable thermal performance.
- Industrial HVAC & chillers: Used in evaporators, condensers, and refrigeration systems, supported by brazing clad strips and pre-treated tubes for durable operation.
- Renewable energy systems: Suitable for energy storage, power modules, and inverter cooling, supported by clad aluminum materials and shaped filler alloys for compact heat exchange systems.
Source aluminum brazing materials optimized for heat exchangers, HVAC systems, and advanced thermal management applications.
Aluminum Welding & Brazing Material Selection Guide
Selecting the right aluminum joining material depends on application requirements, joint performance, and production process. The following guidelines help engineers choose suitable welding or brazing solutions.
- Choose welding for structural strength: Suitable for load-bearing applications such as frames, supports, and heavy-duty aluminum structures.
- Choose brazing for thermal systems: Ideal for heat exchangers, HVAC systems, and battery cooling applications requiring controlled melting and high thermal efficiency.
- Select alloys based on performance: Use ER4043 for general welding, ER5356 for high strength, and 4xxx series alloys for brazing and heat exchanger applications.
- Match product form to process: Welding wire and rods for fabrication and repair; clad sheets and brazing alloys for mass production and heat exchanger manufacturing.
Technical Support & Production Capability
Chalco provides full-process technical support and integrated manufacturing capability for aluminum welding and brazing materials. From alloy design to finished wire, rod, clad sheet, tube, or structural assembly, every production step is controlled in-house—ensuring stable metallurgy, consistent properties, and reliable performance across all joining processes.
Our engineering team offers professional guidance on alloy selection, filler material selection, wire and rod customization, clad ratio design, brazing process compatibility, and joint performance optimization. Whether you are using MIG, TIG, Stick (SMAW), torch brazing, induction brazing, CAB/Nocolok, or vacuum brazing, Chalco provides tailored solutions to match your application requirements.
With large-scale extrusion, rolling, cladding, drawing, and annealing lines, Chalco supports high-volume production of sheets, coils, tubes, foils, brazing strips, wires, and rods. We also supply micro-channel tubes, HF-welded tubes, cold plate materials, and brazed components for automotive radiators, condensers, battery cooling systems, HVAC coils, and industrial heat exchangers.
In addition to aluminum-based materials, Chalco also supplies multi-metal brazing solutions including silver brazing rods, copper brazing rods, and high-activity brazing fluxes, supporting multi-material joining applications in HVAC, electronics, refrigeration, and industrial systems.
For customized joining solutions or multi-material brazing requirements, please contact our engineering team for project consultation and quotation.
Technical Data for Aluminum Welding & Brazing Materials
To support material selection, alloy matching, and process optimization, Chalco provides complete technical data for both aluminum welding fillers and brazing alloys. The tables below summarize chemical composition, melting ranges, and recommended applications to help engineers identify the most suitable filler metal for their joining process.
Aluminum Welding Alloy Technical Data
Mechanical properties and melting characteristics vary across ER-series welding alloys. The following table summarizes common grades used for MIG/TIG welding of aluminum plates, extrusions, and castings.
| Alloy | Chemical Composition | Melting Range | Typical Use |
| ER4043 | Al–5%Si | 573–625 °C | General-purpose welding; reduced cracking; good flow |
| ER5356 | Al–5%Mg | 555–635 °C | High strength; marine grade; 5xxx to 6xxx welding |
| ER5183 | Al–4.5%Mg–Mn | 535–630 °C | High-strength structural welding; cryogenic service |
| ER4943 | Al–4.5%Si–Mg | 560–620 °C | Higher strength upgrade to 4043 |
| ER4643 | Al–5%Si–Mg modified | 560–620 °C | Good fluidity with improved strength for castings |
| ER4047 | Al–12%Si | 573–582 °C | Low-melting; excellent fluidity; ideal for filling gaps |
Aluminum Brazing Alloy Technical Data
Aluminum–silicon brazing alloys are selected based on melting temperature, flow behavior, and compatibility with 3xxx and 6xxx core materials. The following data covers the main brazing filler layers used in clad sheets, wire, rings, and flux-assisted brazing.
| Alloy | Chemical Composition | Melting Range | Typical Use |
| 4043 | Al–5%Si | 573–625 °C | General brazing filler; controlled atmosphere brazing (CAB) |
| 4045 | Al–10%Si | 575–605 °C | Cladding alloy for heat-exchanger fins and sheets |
| 4047 | Al–12%Si | 573–582 °C | Low-melting brazing sheet, wires, and rings |
| 4343 | Al–7.5%Si | 577–585 °C | Most widely used clad alloy for radiators & condensers |
| 4004 | Al–9%Si–Cu | 577–613 °C | Composite sheets and fin materials for automotive HVAC |
| 4A13 | Al–11%Si–Cu | 570–600 °C | Brazing strip & foil for high-strength joints |
| 4A17 | Al–12%Si–Cu | 555–580 °C | Lower melting brazing foil for controlled flow |
Need detailed datasheets or alloy-matching recommendations? Contact our engineering team for customized welding or brazing data.
Chalco can provide you the most comprehensive inventory of aluminum products and can also supply you customized products. Precise quotation will be provided within 24 hours.
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