4343/3003 Aluminum brazing sheet coil strip for radiator fin

The Aluminum brazing sheet coil strip is a multilayered composite sheet, typically encompassing diverse metallic alloys that are seamlessly fused through brazing processes. This method ensures the optimal utilization of the unique properties of each alloy, while satisfying the demanding requirements of high thermal conductivity and corrosion resistance. Consequently, it finds extensive applications in automobiles, construction machinery, power stations, as well as residential and commercial air conditioning heat exchange systems, where heat transfer efficiency and corrosion resistance are paramount.

The utilization of 4343/3003/4045 aluminum brazing plates serves as a prevalent example in the realm of brazed composite materials, particularly in their application as radiator fins. Radiators typically consist of heat pipes, fins, side plates, and motherboards, with the fins systematically arranged in an orderly fashion. This design facilitates the integration of various metal layers, each boasting distinct properties like exceptional thermal conductivity and corrosion resistance, to cater to specific operational demands. Notably, 3003 aluminum serves as the backbone, while 4343 aluminum fulfills the role of brazing clad for CAB applications.

Specification of Brazing Aluminum Sheet Coil Strip
Alloy Temper Thickness (mm) Width (mm) Length (mm)
Core 3003 3003+Zn 3003MOD O,H12,H14,H16,H18,H22,H24,H26 0.5~5.0mm 500-1200mm C
Brazing clad for CAB 4343 4045 
Contact-water clad 7072
Clad Rate 4-18% per side, or customer requested
Packaing Export standard package
Normal Alloys Plates 4045/3003, 4343/3003, 4045/3003/4045, 4343/3003/4343, 4343/3003 and etc.


Performance index of radiator fin material
Alloy Temper Thickness(mm) Tolerance(mm) Clad rate(%) Mechanical property
Tensile Strength (MPa) Yield Strength(MPa) Elongation Min.(%)
3003 H14 0.06-0.10 ±0.005 None 150~200 ≥120 1
4343/3003/4045 H14 0.06-0.10 ±0.005 8-12 150~200 ≥120 1
Performance index of radiator board material
Alloy Temper Thickness(mm) Tolerance(mm) Clad rate(%) Mechanical property
Tensile Strength (MPa) Yield Strength(MPa) Elongation Min.(%)
4343/3003 O 1.2-3.0 ±0.03 5-10 100~150 ≥45 25
4343 can be replaced by 4045/4047etc, according to customer’s requirement.
Alloyspecification and mechanical property can be customized according to different requirement.
Advantages of Brazing Aluminum Sheet Coil Strip
1. Brazed aluminum plate has good heat resistance and high temperature resistance, and has certain corrosion resistance;
2. Excellent collapse resistance during brazing;
3. Brazed aluminum coils have good mechanical properties and surface conditions
4. Brazed aluminum plate has high strength, excellent welding performance, and perfect strength after brazing.
5.Mingtai Aluminum provides various specifications for fin and brazing aluminum plate coil strip.

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