Brazing aluminum strip is a composite material made by rolling a core alloy with one or more layers of brazing alloy (e.g. 4343, 4045, 7072). Designed for heat exchangers, cooling systems, and high-conductivity connections, it supports single-side, double-side, or multi-layer cladding based on application needs. It is widely used in automotive condensers, evaporators, liquid cooling plates, intercoolers, and HVAC systems.
Especially in the manufacturing of finned tubes (Fin Tubes), brazing aluminum strip serves as a core material with excellent formability, welding compatibility, and corrosion resistance, making it a key material in modern thermal management and energy-efficient heat exchange systems. Chalco offers brazing sheet, strip, and foil products in various structures and specifications. The base layer and cladding (brazing) alloys include the following:
| Brazing layer grade | Base grade | State | Coverage rate (%) | Thickness(mm) | Width(mm) | Plate length (mm) | Coil inner diameter (mm) | Coil outer diameter (mm) |
|
4A13 4A17 4A43 4A45 4045 4045 4047 4104 4343 |
3A11 3003 3003 6A02 6060 6082 6951 7A11 7072 |
O H12 H22 H14 H24 H24 H16 H26 |
3.0 ~ 25.0 | 0.050 ~ 6.000 | 7.0 ~ 1600.0 | ≤10, 000 |
75.0 150.0 200.0 250.0 300.0 400.0 500.0 505.0 |
2500.0 |
| The order of alloy structure is "brazing layer/substrate layer", such as 4343/3003 | ||||||||
| The 7072 grade is an anodic anti-corrosion layer, which is usually used as an outer layer in a three-layer or multi-layer structure. | ||||||||
Chalco can customize the brazing layer thickness, core material strength, strip width and surface treatment method according to different product structure requirements, providing customers with an integrated solution from alloy ratio to pipe making.
Chalco brazing aluminum strip product type recommendation
Chalco single-sided brazing clad aluminum strip
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It is suitable for products where only one side of the structural parts needs to be welded, such as single-sided heat exchange fins, simplified brazing components, etc. It has the characteristics of good cost control and excellent processing performance.
Wide range of cooperation areas: HVAC fins, heat exchanger structural plates, local welding support components
Hot selling alloy combination includes:
- 4343/3003
- 4343/3102
- 4343/6951
- 4045/6061
Double-side clad brazing strip
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Used for structures that require double-sided brazing to ensure welding integrity and structural rigidity. Commonly used in sandwich composite panels, cooling channel panels and intercooler structures.
Wide range of cooperation areas: multi-layer heat exchange sheet , high-strength double-sided heat dissipation structure , EV thermal control system shell composite structure
Hot selling alloy combination includes:
- 4343/3003/4343
- 4045/3102/4045
- 4343/6951/4343
- 4343/6061/4343
Functional brazing strip
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Integrate special properties into the brazed structure, including anti-corrosion coating (7072), Zn-modified core material, high thermal conductivity core material or surface pre-treatment coating (such as anode, black oxidation, hydrophilic/hydrophobic coating, etc.), suitable for complex working conditions or high performance requirements.
Typical application areas: heat exchangers in high salt mist environments, electric vehicle battery cooling pipes, precision welding electronic structures
Hot selling alloy combination includes:
- 4343/3003+Zn/7072
- 4045/3102/7072
- 4343/6951/7072
- 4343/6061/PET coating
Clad brazing strip for tube forming
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It is specially used for high frequency welded tube (HFW), liquid cooling flat tube, intercooler tube and other tube making applications, and can be directly used for subsequent rolling and welding forming. This kind of product has excellent forming ductility, surface cleanliness and welding compatibility, and is also one of the key raw materials for brazed fin tube (Fin Tube).
Typical applications: heat exchange fin tubes , battery cooling microchannel tubes , HVAC structural heat dissipation tubes , aircraft composite fluid piping systems
Hot selling alloy combination includes:
- 4343/3003/7072
- 4045/3003+Zn/7072
- 4343/3102/7072
- 4343/6061/4343
- 4343/6951/7072
Core alloy strip for brazing foil & strip
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Chalco not only provides clad brazing composite strips, but also supplies core aluminum strips with excellent performance separately, which are suitable for your material matching in self-composite or multi-layer precision lamination. Our core materials have excellent formability, thermal conductivity and mechanical stability, and are suitable for brazing foils, multi-layer composite strips, fin tube raw materials and other structures.
Main applications: multi-layer brazing foil composite core layer, high frequency welding tube core material (fin stock), heat exchange plate intermediate base material, multi-functional electronic heat sink internal base material
Hot selling alloys and features:
| Alloy | Features |
| 3003 | Universal rust-proof aluminum with good formability, suitable for all kinds of brazing structures |
| 3003+Zn | Modified core material, enhanced corrosion resistance, used for marine condensers and cooling modules |
| 3102 | High conductivity aluminum-manganese alloy , suitable for high current thermal control structure |
| 6061 | High-strength structural core material, suitable for pressure-bearing and anti-deformation scenarios |
| 6951 | Alloy for precision structures, excellent in corrosion resistance and formability, widely used in heat exchanger fins |
| 8011 | Moderate strength, suitable for composite strips and deep- drawing parts |
| 7072 | Can be used as a sacrificial anti-corrosion layer or in core composite structures |
Supply form:
- Aluminum coil
- The surface can be anodized, degreased, and pre-treated
- Supports fixed width and fixed thickness (thickness tolerance can be controlled within ±0.01mm)
Chalco brazing aluminum strip application cooperation areas
Chalco brazing aluminum strips are widely used in industries such as automotive thermal management, new energy systems, refrigeration and air conditioning, power electronics, and rail transportation, meeting a variety of composite brazing needs from high-frequency welded tubes (fin tubes), fins, cold plates to structural components.
New energy vehicle thermal management system (EV thermal management)
In new energy vehicle (EV) thermal management systems, brazing aluminum strip is widely used in battery cooling channels, liquid cooling plates, heat diffusion layers, and flexible cooling loops. Chalco offers multilayer composite solutions (e.g., 4343/3003+Zn/7072) or single-sided clad strips, delivering excellent thermal conductivity, corrosion resistance, and weldability.
- 4343/3003+Zn/7072 multifunctional composite welding strip
- 4343/3102 Single-sided composite aluminum strip
- 3003 core aluminum strip for Fin tube
Refrigeration and air conditioning equipment (HVAC & refrigeration)
In HVAC and refrigeration systems, brazing aluminum strip is commonly used in evaporators, condensers, headers, and bellows fins. Chalco provides high-consistency double-sided composite solutions (e.g., 4045/3102/4045), engineered to ensure excellent brazing structure stability.
- 4045/3003/4045 double-sided brazing strip
- 3003+Zn core material+ surface heat sealing or coating treatment
- Tube-forming Clad Strip
Electronics & power cooling
In electronics and power cooling applications such as IGBT module cooling plates, precision liquid cooling channels, and inductor shielding structures, Chalco offers 6061 core material combined with 4343/7072 cladding to ensure both structural strength and electrical compatibility.
- 4343/6061/7072 Three-layer brazing strip
- Clad strip for high frequency welding heat sink
- EMI thermal conductive soldering tape (customized coating supported)
Industrial heat exchangers
In industrial heat exchanger applications such as heat exchange cores, steam condensers, and industrial liquid cooling structures, Chalco provides wide multi-layer brazing strips designed for large-scale rolling processes and multiple heat treatment cycles.
- 4343/6951/7072 Multilayer composite strip
- 4045/3102/7072 High corrosion resistance brazing strip
- Custom thickness core strip for brazing forming
In addition to high-quality brazing strips, we also offer a variety of brazing materials, including brazing aluminum foil, filler rods, and welding wires, fully meeting your diverse needs across different brazing processes. Explore our brazing materials range and let us help enhance your production efficiency and welding quality.Quick Quote
Chalco brazing aluminum strip production capabilities and customization services
In order to meet the manufacturing needs of various high-performance brazing structural parts (such as headers, cooling plates, finned tubes, and flexible heat exchange structures), Chalco has established a complete brazing aluminum strip production and processing system, covering the entire process of alloy design → multi-layer composite → precision rolling → surface treatment → slitting and packaging, supporting standard and customized batch supply.
Overview of main production capabilities
| Project | Capability parameters |
| Alloy Support | 1100, 3003, 3102, 6061, 6951, 4343, 4045, 7072, etc. |
| Aluminum Strip Thickness Range | 0.05 mm – 3.0 mm (supports three-layer composite structure) |
| Width range | The maximum width of aluminum coil base material is more than 1500 mm, which can be cut according to project requirements |
| Composite structure | Single-layer coating/Double-layer coating/Three-layer composite/Zn modified brazing strip |
| Interlayer uniformity | The composite layer thickness tolerance is ±0.003 mm, and the edge alignment accuracy is ≤±0.2 mm. |
| Surface state | Soft (O) / H14 / H18 / H22 / H24 etc. |
| Coating method | Roll-pressed composite, cladding composite, directional symmetrical composite, support for zoned cladding |
| Cutting accuracy | ±0.3 mm, suitable for high-speed pipeline equipment and automated processing requirements |
Surface treatment and post-processing services
- Degreasing: Improve welding cleanliness and bonding interface stability
- Anodizing/electrophoresis/nano coating: enhancing anti-corrosion performance and surface function
- Color coating (carbon coating/sintered conductive film): used for high-performance cold plates or battery housings
- Adhesive/ heat-sealing film pre-coating : suitable for quick bonding or multi-layer structure stacking
- Rolls/cut-to-length sheets/ die-cut strips : Flexible delivery methods based on project requirements
Packaging and delivery logistics
- Packaging: moisture-proof vacuum film + stretch film + export wooden box, suitable for global transportation
- Delivery cycle: 7-10 working days for conventional products, and the delivery time will be clear after the customized structure is confirmed
- Testing support: with alloy composition analysis, thickness report, composite layer control report, mechanical properties testing, etc.
Chalco brazing composite belt product technical parameters and performance indicators
Chalco can provide single-sided/double-sided coated and three-layer composite brazing aluminum strips . Its mechanical properties, composite layer accuracy and welding adaptability meet or exceed industry standards and are widely used in high-demand brazing structures.
Chalco brazing aluminum strip coverage deviation
| Coverage rate (%) | Coverage rate tolerance (%) |
| 3.0～6.0 | ±1.2 |
| >6.0～8.0 | ±1.5 |
| >8.0～13.0 | ±2.0 |
| >13.0～25.0 | ±3.0 |
Chalco brazing aluminum strip thickness deviation
| Thickness(mm) | ≤1000 mm width deviation | >1000～1320 mm width deviation | >1320～1600 mm width deviation |
| 0.050～0.100 | ±0.006 | ±0.006 | ±0.006 |
| >0.100～0.200 | ±0.015 | ±0.015 | ±0.015 |
| >0.200～0.400 | ±0.020 | ±0.030 | ±0.040 |
| >0.400～0.700 | ±0.030 | ±0.040 | ±0.050 |
| >0.700～1.000 | ±0.040 | ±0.050 | ±0.060 |
Room temperature tensile mechanical properties of Chalco composites
| Temper | Thickness(mm) | Tensile strength Rm (N/mm²) | Specified non-proportional elongation strength Rp0.2 (N/mm²) | Elongation after fracture A50mm (%) |
| O | 0.050～0.100 | 95～160 | 35 | ≥6.0 |
| >0.100～0.200 | 95～160 | 35 | ≥10.0 | |
| >0.200～1.300 | 95～160 | 35 | ≥18.0 | |
| >1.300～6.000 | 95～160 | 35 | ≥20.0 | |
| H12 | 0.050～0.100 | 120～170 | 90 | ≥1.0 |
| >0.100～0.200 | 120～170 | 90 | ≥3.0 | |
| >0.200～1.300 | 120～170 | 90 | ≥4.0 | |
| >1.300～6.000 | 120～170 | 90 | ≥5.0 | |
| H22 | 0.050～0.100 | 120～170 | 80 | ≥2.0 |
| >0.100～0.200 | 120～170 | 80 | ≥6.0 | |
| >0.200～1.300 | 120～170 | 80 | ≥6.0 | |
| >1.300～6.000 | 120～170 | 80 | ≥7.0 | |
| H14 | 0.050～0.100 | 150～200 | 125 | ≥0.5 |
| >0.100～0.200 | 150～200 | 125 | ≥1.0 | |
| >0.200～1.300 | 150～200 | 125 | ≥2.0 | |
| >1.300～6.000 | 150～200 | 125 | ≥5.0 | |
| H24 | 0.050～0.100 | 150～200 | 115 | ≥1.0 |
| >0.100～0.200 | 150～200 | 115 | ≥3.0 | |
| >0.200～1.300 | 150～200 | 115 | ≥3.0 | |
| >1.300～6.000 | 150～200 | 115 | ≥5.0 | |
| H16 | 0.050～0.100 | 170～230 | 150 | ≥0.5 |
| >0.100～0.200 | 170～230 | 150 | ≥1.0 | |
| >0.200～1.300 | 170～230 | 150 | ≥2.0 | |
| >1.300～6.000 | 170～230 | 150 | ≥2.0 | |
| H26 | 0.050～0.100 | 170～230 | 140 | ≥1.0 |
| >0.100～0.200 | 170～230 | 140 | ≥2.0 | |
| >0.200～1.300 | 170～230 | 140 | ≥3.0 | |
| >1.300～6.000 | 170～230 | 140 | ≥5.0 | |
| H18 | >0.100～0.200 | ≥200 | 170 | ≥0.5 |
| >0.200～6.000 | ≥200 | 170 | ≥1.0 |
Room temperature tensile mechanical properties of composite materials
| Temper | Thickness(mm) | Tensile strength Rm (N/mm²) | Specified non-proportional elongation strength Rp0.2 (N/mm²) | Elongation after fracture A50mm (%) |
| O | 0.050～0.100 | 95～165 | 35 | ≥6.0 |
| >0.100～0.200 | 95～165 | 35 | ≥10.0 | |
| >0.200～1.300 | 95～165 | 35 | ≥18.0 | |
| >1.300～6.000 | 95～165 | 35 | ≥20.0 | |
| H12 | 0.050～0.100 | 125～205 | 90 | ≥1.0 |
| >0.100～0.200 | 125～205 | 90 | ≥2.0 | |
| >0.200～1.300 | 125～205 | 90 | ≥3.0 | |
| >1.300～6.000 | 125～205 | 90 | ≥6.0 | |
| H22 | 0.050～0.100 | 125～205 | 80 | ≥2.0 |
| >0.100～0.200 | 125～205 | 80 | ≥3.0 | |
| >0.200～1.300 | 125～205 | 80 | ≥7.0 | |
| H14 | 0.050～0.100 | 145～225 | 125 | ≥1.0 |
| >0.100～0.200 | 145～225 | 125 | ≥2.0 | |
| >0.200～1.300 | 145～225 | 125 | ≥4.0 | |
| H24 | 0.050～0.100 | 145～225 | 115 | ≥2.0 |
| >0.100～0.200 | 145～225 | 115 | ≥3.0 | |
| >0.200～1.300 | 145～225 | 115 | ≥5.0 |
Room temperature tensile mechanical properties of composite materials
| Temper | Thickness(mm) | Tensile strength Rm (N/mm²) | Specified non-proportional elongation strength Rp0.2 (N/mm²) | Elongation after fracture A50mm (%) |
| O | 0.200~6.000 | ≤160 | 85 | 16.0 |
Typical grades, states, coverage and dimensions of composite strips for pipe making
| Brazing layer grade | Base grade | state | Thickness (mm) | Width (mm) | Coverage rate (%) |
| 4A13, 4A17, 4A43, 4A45, 4004, 4045, 4047, 4104, 4343 | 3B11, 3003, 3005, 7072 | H14 | >0.200～ 3.000 | 7.0～ 1400.0 | 3.0～20.0 |
| H24 |
FAQ for purchasing Chalco brazing aluminum strip
What brazing aluminum strip structures and specifications are available?
Chalco can provide single-clad, double-clad, three-layer composite and special multi-functional brazing aluminum strips with typical thickness range of 0.05-3.0 mm and width range of 20-1350 mm, supporting customized coil length, fixed width, edge tolerance and surface pre-treatment.
Can you customize brazing strips for pipe making?
Of course. We provide typical alloy structures such as 4343/3003, 4045/3003, 4343/6951, which are widely used in heat exchange tube/flat tube manufacturing, suitable for rolling, welding and tube forming processes, and support customized coverage and aluminum strip state (such as H14/H24).
Can brazed aluminum strip be used in fin manufacturing?
Yes. We can provide high-strength brazing aluminum strips that meet the requirements of fin forming, including a composite structure of fin core material (such as 3003, 6951, etc.) and a cladding layer, supporting thin strip stripping, high flatness control and surface anti-oxidation treatment.
What is the minimum order quantity for brazing aluminum strip?
The minimum order quantity for standard alloy structures is 1 ton. Special structures or small batch proofing can be negotiated on demand to support fast delivery.
Can you provide test reports that comply with international standards?
All Chalco brazing aluminum strip products can provide test reports such as chemical composition analysis, mechanical properties testing, metallographic inspection, coverage verification, etc. according to customer needs, and support delivery in accordance with GB/T, ASTM, EN and other standards.
Chalco has a mature composite aluminum strip production system and comprehensive customized processing capabilities, and can provide you with high-quality single-sided/double-sided/multi-layer brazing aluminum strips, core aluminum strips, and aluminum strip solutions for tube making. Whether you are from the automotive thermal management, heat exchanger manufacturing, air conditioning and refrigeration, or new energy cooling industries, we can provide the most matching material support for your product structure.
Welcome to contact us for samples, drawing consultation or customized suggestions. Chalco technical and sales team will provide you with one-to-one professional support and quick response service.
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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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