HenanChalco supplies flat-oval aluminum radiator tube for radiator core manufacturing, serving automotive, commercial vehicle, and construction equipment radiator projects. These thin-wall welded aluminum tubes can be specified with a brazing-clad aluminum material system to suit project requirements. Support includes:
- Flat / flat-oval tube supply to specified dimensions
- Matching existing tube profiles and dimensions
- Project development based on drawings or samples
- Confirmation of brazing-clad aluminum material construction
Selecting aluminum radiator tube involves more than W × H × T dimensions. Tube profile, wall thickness, material construction, weld quality, and brazing compatibility must all be considered to meet core assembly, brazing, and service requirements.
Aluminum Radiator Flat Tube Specifications
| Item | Specification Range / Details |
| Tube Profile | Flat / flat-oval tube |
| Width Range | 12–40 mm |
| Height Range | 1.45–2.00 mm |
| Wall Thickness Range | 0.20–0.40 mm |
| Material Form | Brazing-clad aluminum |
| Common Material Constructions | 4343/3003/7072; 4343/3005/7072 |
| Manufacturing Method | Thin-wall high-frequency welded aluminum tube |
| Primary Application | Radiator core manufacturing |
| Development Basis | Confirmation based on drawings, samples, or project requirements |
Common Tube Sizes
Common sizes accommodate different radiator core designs, including small thin-wall tubes, medium-size radiator tubes, and larger profiles for applications with higher strength requirements.
| Tube Profile | Common Sizes (W × H, mm) | Wall Thickness Range (mm) |
| Flat-Oval Tube | 12×1.7 | 0.20–0.26 |
| Flat-Oval Tube | 14×1.6 | 0.20–0.26 |
| Flat-Oval Tube | 14.55×1.45 / 1.5 | 0.20–0.25 |
| Flat-Oval Tube | 16×1.5 | 0.20–0.28 |
| Flat-Oval Tube | 16×1.8 | 0.20–0.38 |
| Flat-Oval Tube | 16×2.0 | 0.20–0.40 |
| Flat-Oval Tube | 18×2.0 | 0.26–0.35 |
| Flat-Oval Tube | 20×1.5 / 2.0 | 0.25–0.30 |
| Flat-Oval Tube | 22×1.8 | 0.25–0.35 |
| Flat-Oval Tube | 22×2.0 | 0.24–0.40 |
| Flat-Oval Tube | 23.5×2.0 | 0.25–0.40 |
| Flat-Oval Tube | 26×2.0 | 0.25–0.40 |
| Flat-Oval Tube | 32×2.0 | 0.30–0.32 |
| Flat-Oval Tube | 34×1.8 | 0.32 |
| Flat-Oval Tube | 36×1.6 | 0.30–0.35 |
| Flat-Oval Tube | 40×2.0 | 0.30–0.40 |
Specifying aluminum flat tube for radiators requires consideration of the complete tube profile and material system as well as the external dimensions. HenanChalco can match existing flat-oval tube specifications based on customer drawings, samples, or technical requirements, and supports specification development for special projects.
Related Radiator Tube Profiles
If a standard flat-oval radiator tube does not suit your radiator core structure, available space, or heat transfer requirements, alternative cross-sectional profiles can be evaluated against the project requirements.
B-Type Radiator Tube
B-Type tube has a specialized cross section suited to certain radiator and heat exchanger core designs. Suitability can be confirmed against project drawings and specifications
Hourglass Radiator Tube
Hourglass tube has a distinctive waisted cross section for radiator applications with specific space and structural requirements.
Microchannel / Multi-Port Tube
Microchannel tube has multiple internal channels and belongs to a different family of aluminum heat exchange tubes from conventional welded flat tube. It is commonly used in high-efficiency heat exchange systems.
For specialized radiator tube profiles, HenanChalco can confirm specifications based on customer drawings, samples, and application requirements, and help identify a suitable aluminum radiator tube solution.
Brazing-Clad Material Construction for Aluminum Radiator Tubes
Aluminum flat tubes for radiator core manufacturing typically use brazing-clad aluminum. Different alloy layers are combined to meet brazed joining, forming, and long-term service requirements.
Brazing-Clad Aluminum Tube Structure
Aluminum radiator tubes can use multilayer brazing-clad aluminum, with individual alloy layers providing brazing, structural support, and corrosion resistance.
- 4343 Brazing Layer: An Al-Si cladding layer supplies the filler metal needed for joining during controlled atmosphere brazing (CAB).
- 3003 / 3005 Core Layer: Forms the main body of the tube, balancing formability and structural strength.
- 7072 Sacrificial Layer: An Al-Zn cladding layer improves tube corrosion resistance through sacrificial protection.
The layer construction is not fixed. It should be selected according to the radiator core design, tube profile, and service environment.
Common Material Combinations
| Common Material Construction | Layer Structure | Typical Applications |
| 4343/3003/7072 | Brazing layer + 3003 core + sacrificial corrosion-protection layer | Automotive and conventional radiator tubes |
| 4343/3005/7072 | Brazing layer + 3005 core + sacrificial corrosion-protection layer | Automotive applications and projects with different core material performance requirements |
| 4343/3003/4343 | 4343 cladding on both sides + 3003 core | Selected tube profiles for automotive, heavy-duty vehicle, and construction equipment applications |
| 4343/3005/4343 | 4343 cladding on both sides + 3005 core | Selected tube profiles for automotive, heavy-duty vehicle, and construction equipment applications |
| 4045/3003 | 4045 brazing layer + 3003 core | Automotive and construction equipment radiator projects |
| 4045/3005 | 4045 brazing layer + 3005 core | Radiator projects with different core material performance requirements |
| 4045/3005/7072 | 4045 brazing layer + 3005 core + 7072 sacrificial corrosion-protection layer | Radiator projects with brazing performance and corrosion resistance requirements |
Radiator tube material selection should be confirmed in conjunction with the core design, brazing process, and service environment.
High-Frequency Welding and Quality Control
Thin-wall aluminum radiator tubes require close control of cross-sectional dimensions, weld quality, and lot-to-lot consistency. High-frequency welding processes and finished-product inspection can be used to control the profile dimensions, weld condition, and pressure-bearing performance of flat-oval tubes.
High-Frequency Welded Tube Manufacturing Process
Flat-oval radiator tubes are continuously formed and high-frequency welded from brazing-clad aluminum strip. Sizing then controls the finished cross section and dimensions.
Brazing-Clad Aluminum Strip → Roll Forming → High-Frequency Welding → Sizing and Shaping → Cut to Length → Final Inspection
Thin-wall aluminum tube supply support for radiator and heater cores can be provided according to project needs. Specific production and inspection capabilities must be confirmed against project requirements.
Finished-Product Inspection and Quality Verification
Finished-product inspection focuses on dimensional profile, weld integrity, and pressure-bearing performance. Vision measurement and optical projection check tube dimensions and cross sections; dual-channel eddy current testing checks weld quality; burst testing verifies pressure-bearing performance; and metallographic examination provides further assessment of the weld and cross section.
Lot Records and Consistency
For volume production, supply can be organized to the approved drawings, dimensions, material specifications, and inspection requirements, with product consistency controlled across lots. Records of dimensional inspection, eddy current testing, burst testing, and lot traceability requirements can be confirmed according to the project's quality requirements.
Aluminum Radiator Tube Applications
Flat-oval aluminum radiator tube is primarily used in radiator core manufacturing. Common applications include automotive, commercial vehicle, and construction equipment radiators. Tube sizes, profiles, and material options can be confirmed for each project according to the core structure, available space, and service environment.
Automotive Radiators
Flat-oval aluminum radiator tubes are widely used in automotive radiators, heater cores, and related cooling systems.
The tubes must meet requirements for thin-wall forming, welding stability, and brazing-clad material construction to support core assembly and long-term operation.
Construction Equipment and Heavy-Duty Vehicle Radiators
Radiators for construction equipment and heavy-duty vehicles generally require greater structural reliability and dimensional stability.
Flat-oval tube sizes and material constructions can be selected to suit different core designs.
Industrial Cooling Equipment
Flat-oval aluminum tube can also be used in certain industrial cooling equipment and custom cooling systems.
For projects requiring special specifications, tube specifications can be matched to customer drawings, samples, and application requirements.
Aluminum Radiator Tube Project Requirements
Radiator projects differ in their requirements for tube profile, dimensions, and material construction. Providing basic project information helps identify a suitable aluminum radiator tube solution more quickly.
When confirming specifications, the key points typically include:
- Tube Profile: Flat-oval tube structure and cross-sectional requirements;
- Tube Size: Key dimensions, including width, height, and wall thickness;
- Material Requirements: Clad aluminum construction and performance requirements;
- Drawing or Sample: For matching existing specifications or confirming replacement requirements.
For new project development or replacement of existing radiator tubes, HenanChalco can provide specification matching and project development support according to project requirements.
Aluminum Radiator Tube FAQ
Can You Match an Existing Flat-Oval Tube from My Radiator Tube Sample or Drawing?
Yes.
For existing radiator core replacement projects or a change of supplier, flat-oval tube dimensions, profiles, and material constructions can be matched and confirmed using customer samples, cross-sectional information, or drawings.
Which Dimensions Should Be Specified for Flat-Oval Aluminum Radiator Tube, and How Do I Select the Right Size?
Aluminum radiator flat tube specifications typically require confirmation of width, height, and wall thickness (W × H × T), together with the tube profile and material requirements.
For existing projects, suitable dimensions can generally be confirmed from the original tube specifications, product drawings, or samples. For new projects, tube sizes should be matched to the radiator core design.
What Information Is Needed When Purchasing Aluminum Radiator Tube for a New Project or an Alternative Supply Source?
To identify a suitable aluminum radiator tube solution, provide the required tube profile, dimensions, material requirements, and product drawings or samples.
Complete project information helps confirm the tube construction, material combination, and subsequent supply arrangement.
Why Do Automotive Radiator Tubes Use Brazing-Clad Material Constructions Such as 4343/3003/7072?
Aluminum radiator tubes typically use brazing-clad aluminum to meet joining requirements during core manufacturing and long-term service needs.
Different alloy layers provide brazing, structural support, and corrosion resistance. The specific material combination should be selected according to the radiator design, brazing process, and service environment.
How Are Weld Quality and Lot-to-Lot Consistency Controlled in High-Frequency Welded Flat-Oval Radiator Tubes?
High-frequency welded radiator tubes require close control of profile dimensions, weld condition, and production consistency.
Product quality can be verified during production through dimensional inspection, eddy current testing, and burst testing. The corresponding inspection records can be confirmed according to project requirements.
Can Custom Sizes Be Developed If My Existing Radiator Tube Falls outside the Standard Size Range?
Yes.
For special sizes or nonstandard projects, specifications can be confirmed from customer drawings, samples, and technical requirements. A custom solution can then be evaluated based on the material construction and production conditions.
