ASTM A213 Grade T11 Alloy Steel Seamless Extruded Finned Tubes
The base tube is made of Austenitic Alloy Steel ASTM A213 Grade T11 (ASME SA213 Grade T11) material, and aluminum fins are rolled out using an extrusion process. It is mainly used in industrial air-cooled heat exchangers.
- Standard Specification: ASTM A213 / ASME SA213 Grade T11
- Base Tube Form: Seamless hot-rolled or cold-drawn
- Base Tube Outside Diameter (OD): 12.7 mm – 60 mm
- Fin Height: 6.35 mm – 15.87 mm (1/4″ to 5/8″)
Datang-ASTM A213 T11 Seamless Alloy Finned Tubes-Extruded Fins Professional Manufacturer
ASTM A213 T11 seamless alloy extruded bimetallic finned tubes are high-performance heat transfer component engineered specifically for high-temperature, high-pressure, and corrosive environments. It integrates the robust high-temperature pressure resistance of ASTM A213 T11 low-alloy steel base tubes with the superior heat dissipation and corrosion resistance of extruded aluminum fins. Utilizing a bimetallic composite process, the outer aluminum tube is mechanically extruded under intense pressure to tightly encapsulate the base tube and form integral fins, achieving zero-gap thermal resistance. This product is widely used across core industrial sectors, including power generation and petrochemical processing.
ASTM A213 T11 Seamless Alloy Extruded Bimetallic Finned Tubes Material & Technical Specifications
| Feature / Parameter | Specification / Technical Metric | Key Performance Highlights |
| Base Tube Material | ASTM A213 Gr. T11 (1.25Cr-0.5Mo) | Seamless low-alloy steel tube engineered for elevated temperatures and high pressures; superior creep resistance. |
| Fin Material | Aluminum 1060 / 1100 / 6063 | Pure aluminum or high-conductivity aluminum alloys offering excellent thermal conductivity and ductility. |
| Manufacturing Process | Extruded Bimetallic Composite | Aluminum sleeve is fitted over the base tube and cold-extruded into fins, fully enclosing the outer surface of the base tube. |
| Max Operating Temp. | Up to 280°C – 300°C | Limited by aluminum creep strength and thermal expansion differentials; alternative fin types are recommended for higher temperatures. |
| Corrosion Resistance | Superior (Full Coverage Protection) | The underlying aluminum layer completely shields the base tube from atmospheric exposure and corrosive elements. |
ASTM A213 Seamless Alloy Steel Pipe Performance & Core Characteristics
ASTM A213 T11 is a low-carbon chromium-molybdenum alloy steel with a precisely balanced chemical composition containing 1.00%–1.50% Chromium (Cr) and 0.44%–0.65% Molybdenum (Mo). This precise alloying ratio delivers the following key performance advantages:
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High-Temperature Resistance & Creep Resistance: Maintains stable mechanical strength and exceptional creep resistance during long-term service under elevated temperatures ranging from 540°C to 593°C (tensile strength ≥ 415 MPa).
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Oxidation & Corrosion Resistance: Chromium forms a dense chromium oxide (Cr2O3) protective layer on the steel surface, significantly enhancing its resistance to high-temperature flue gas oxidation and sulfur-bearing corrosive media.
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Stable Mechanical Properties: Following standardized heat treatment, the material achieves a tensile strength of 415 MPa, yield strength of 205 MPa, and elongation of 30%, offering an optimal balance of high structural strength and excellent ductility.
ASTM A213 T11 Seamless Alloy Extruded Bimetallic Finned Tubes Advantages
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Zero Contact Thermal Resistance: The aluminum sleeve undergoes plastic deformation during extrusion, creating a powerful mechanical bond with the A213 T11 base tube to guarantee stable, long-term heat transfer performance.
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Complete Base Tube Protection: The un-extruded aluminum base completely covers the T11 alloy pipe, preventing moisture, acid mist, and corrosive gases from coming into direct contact with the base tube.
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Easy Cleaning & Erosion Resistance: Smooth, sturdy extruded fins tolerate periodic high-pressure water washing or soot blowing without fin bending or mechanical damage.
ASTM A213 T11 Seamless Alloy Finned Tubes-Extruded Fins Applications
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Power Generation & Industrial Boilers: Economizers, air preheaters, and waste heat recovery sections.
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Petrochemical & Oil Refineries: Air-Cooled Heat Exchangers (ACHE) in hydrocracking, catalytic reforming, and processing units.
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Gas Processing & Chemical Engineering: Gas coolers, condensers, and Heat Recovery Steam Generators (HRSG).
Purchasing Guidelines & Quality Control Recommendations
When sourcing high-specification industrial tubing, we recommend prioritizing the following quality assurance criteria:
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Manufacturer Qualifications & Process Expertise: Verify that the supplier holds relevant international manufacturing certifications. Prioritize integrated manufacturers capable of advanced joining and forming processes—such as High-Frequency Resistance Welding (HFW), Laser Welding, and Bimetallic Extrusion—to meet complex operating demands.
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Traceable Mill Test Certificates (MTC): Thoroughly review the product quality documentation (MTC EN 10204 3.1/3.2) provided with each shipment. Ensure it contains clear re-test reports for chemical composition, verified mechanical property and heat treatment records, and non-destructive testing (NDT) certifications.
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Testing & Quality Acceptance: Focus on key quality indicators including first-time weld pass rates, intergranular corrosion test reports, and physical inspections (verifying pipe numbers, heat numbers, and dimensional tolerances). Strict compliance ensures every segment integrated into your industrial system remains safe and reliable.
Do you need products compatible with extruded finned tubes?
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Secondary Fabrication: U-Bending for Extruded Finned TubesWe offer comprehensive secondary processing services for extruded finned tubes, including high-precision U-bending customized to your heat exchanger design and engineering specifications for seamless site assembly.
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Boost your heat exchanger tube production with our advanced Extruded Finned Tube Machine. Built for high-speed output, extreme precision, and long-term durability, it produces top-tier bimetallic finned tubes tailored for boilers, air coolers, and petrochemical processing systems.
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The Fin Stripping Machine is specifically engineered for efficient finned tube end preparation, precisely removing outer aluminum or steel fins to expose the bare base tube. It guarantees smooth, burr-free tube ends—an essential requirement for subsequent welding, tube-sheet expansion, and seamless assembly in heat exchangers and boilers.
Extruded Aluminum Fin Tube Advantages
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30 Advanced Production Lines: Large-scale automated production capability operates at high efficiency to effortlessly handle both high-volume orders and urgent requests.
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Ultra-Fast Delivery: Supported by extensive raw material inventory and flexible scheduling, standard orders can be delivered in as fast as 15–30 days, significantly shortening project and maintenance timelines.
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Precision Extrusion Quality: Cold rotary extrusion ensures a tight, seamless bond between the base tube and fins, achieving zero contact resistance, superior corrosion resistance, and exceptional heat transfer efficiency.
Customizable Extruded Copper Fin Tube
We can customize the material, specification and length according to your requirements.Solve your problems anytime and anywhere. Customize fin tubes and equipment according to your needs. Provide free technical guidance. Welcome to customize with drawings, so that you can purchase without worries.
Strict Quality Inspection
Hydrostatic Pressure Test: The inner base tube is filled with water and tested at 1.5x design pressure (or per ASTM A1016), held for 10–30 seconds to guarantee zero leakage or permanent deformation along the tube and welds.
Pneumatic Underwater Air Test: Pressurized with dry compressed air (0.6–1.0 MPa) and fully submerged in water for over 1 minute—ensuring absolute zero bubble leakage for maximum operational integrity.
Extruded Copper Finned Tubes Package
To ensure seamless global delivery, your extruded copper finned tubes are packaged in fumigation-free wooden cases (or heavy-duty steel frame crates) lined with custom comb separators and moisture-proof film, combined with protective pipe end caps. This guarantees zero fin damage, prevents bending along extra-long tubes, and ensures worry-free moisture protection during ocean freight and custom clearance.
Clear shipping marks and handling labels (moisture-proof/fragile) are stenciled on the exterior to fully meet all ocean transport requirements for rust prevention, anti-deformation, and customs quarantine.
ASTM A213 T11 Seamless Alloy Finned Tubes-Extruded Fins Quality Checks
Each of our extruded fin tube is subjected to stringent quality checks.Inspection and Tests Performed:
1.Chemical Composition inspection.
2.Mechanical Properties Test(Tensile Strength, Yield Strength, Elongation, Flaring, Flattening, Hardness, Impact Test).
3.Surface and Dimension Test.
4.No-destructive Test.
5.Hydrostatic Test.
Case Study
Case Study: 15.875×1.65x17697mm bimetal extruded fin tubes custom-made by Datang for Pakistan. Zero thermal resistance & full QA/QC loading video inside. Backed by 19 years of expertise and CNAS-certified testing, our premium tubes guarantee exceptional heat transfer efficiency and long-term reliability.
Boosting Efficiency with High-Performance Extruded Fin Tubes
When our client from Singapore approached us, they faced a critical challenge: their existing heat exchange equipment was inefficient, leading to escalating energy consumption and higher operational costs. They needed a solution that could maximize heat transfer within their current system constraints.
Tired of frequent downtime caused by corroded fin tubes? Read this case study to see how Datang’s robust extruded aluminum finned tubes saved a major Pakistan paper manufacturing plant from high maintenance costs. Discover how our 19 years of industry expertise and premium materials deliver lasting reliability and efficiency for your critical operations.
Discover how our custom air cooled heat exchangers with copper-aluminum extruded fin tubes optimized cooling for an Algerian refinery. Operating in intense desert heat, high-strength extruded fins completely shield inner copper tubes from sandstorms, boosting cooling capacity by 20% and maintaining maximum processing throughput during punishing peak-temperature months.
Extruded (Bimetallic) Finned Tubes Application
Cooling oil radiators element of the Extruded fin tubes.It can transfer heat quickly and improve the efficiency of thermal energy utilization.
The main advantages of Extruded fin tubes for refinery air coolers include high efficiency, corrosion resistance, low noise, energy saving and environmental protection.
Extruded fin tubes for drying radiators,The extrusion process ensures a tight connection between the fins and the tube body, thereby greatly increasing the heat dissipation area and significantly improving the heat exchange efficiency. This design allows heat to be transferred to the material faster and improves drying efficiency
Extruded finned tubes for waste heat recovery equipment,aluminum extruded fin tubes have the characteristics of high heat transfer performance and low thermal resistance, which can quickly absorb and dissipate heat, further improving the heat exchange efficiency.
Extruded finned tubes for heat exchangers in food factories,The steel-aluminum extruded finned tube adopts a compact structure design, which can achieve efficient heat exchange in a limited space. At the same time, its compact structure is also easy to install and maintain.
Extruded finned tubes for milk pasteurization heat exchangers,extruded spiral fin tubes have excellent thermal conductivity and corrosion resistance, and can operate stably for a long time in harsh working environments.
Extruded fin tubes for thermal oil heat exchangers,aluminum fins have good thermal conductivity and can effectively transfer heat from the inside of the tube to the outside of the tube, thereby improving heat exchange efficiency. At the same time, the design of the fins can increase the heat exchange area and further improve the heat exchange performance.
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Extruded Fin Tube FAQs
A: Extruded fin tube production line 30.
A: We can provide extruded fin tube samples for free.
A: After you confirm extruded fin tube sample details, the samples will be ready for delivery in 3-7days,and will be sent to you via express and arrive in 3-5days.
A: extruded fin tube can be customized, we can make the new thermoforming or extruding mode based on your drawings and we can sign a confidentiality agreement about your patented product, pls contact us for any further information.
A: Always a pre-production sample,before mass production;always final inspection before shipment.
Inspection & Guarantee Certificate is supplied with shipment, and the Third Party Inspection is available.