1. What is ASTM A249 TP304 Extruded Fin Tube?
ASTM A249 TP304 Extruded Fin Tube is a high-integrity heat transfer solution for corrosive and high-purity applications. It features a seamless austenitic stainless steel base tube (ASTM A249 TP304) with integrally extruded aluminum fins metallurgically bonded through high-pressure thermal processing. This monolithic design eliminates interfacial resistance, achieving 98% thermal contact efficiency while providing superior chloride corrosion resistance and FDA-compliant surface finish for pharmaceutical, food processing, and chemical systems up to 260°C (500°F).
2. Chemical & Mechanical Properties
Dimensional Specifications:
| Bare Tube Diameter:9-51mm |
| Fin Height::<17mm | Fin Thickness: 0.2-0.4mm | Fin Pitch: 1.6-10mm | Tube Ends: Plain Ends / Beveled Ends |
| No Fin Area (Both Ends): As Customer’s Request and Drawing |
Chemical Composition (%)
| Element | C | Si | Mn | P | S | Cr | Ni |
| Range | ≤ 0.08 | ≤ 1.00 | ≤2.00 | ≤ 0.045 | ≤0.030 | 18.0–20.0 | 8.0–11.0 |
Mechanical Properties
| Tensile Strength | Yield Strength | Elongation | Hardness | Max Service Temp. |
| ≥515 MPa | ≥205MPa | ≥35% | ≤ 192 HB | 260°C (500°F) |
3. Key Applications & Competitive Advantages
· Pharmaceutical: Clean steam heat exchangers (FDA 21 CFR compliance).
· Food & Beverage: Pasteurizer coils for dairy/juice processing.
· Chemical Processing: HCl coolers with chloride resistance.
· HVAC: Hospital ventilation heating coils.
· Semiconductor: Ultra-pure water heat exchangers.
4. Why Choose ASTM A249 TP304 Extrurded Fin Tube?:
A:Company Competitiveness:
Yuhong Holding Group has more than 35 years experience for steel pipe and tube , fin tube , main application for Petrochemical , Oil refinary, Furnace, heating, boiler, heat exchanger, air cooler,.., till now YUHONG brand products already exported more than 85 countries, which like UK, ITALY, SPAIN , USA, MEXICO , COLOMBIA , BRAZIL, SAUDI ARANBIA , OMAN, QATAR, U.A.E, KOREA, ...., YUHONG brand already won good reputation in the market.
B:Product Competitiveness:
· Zero Contamination Risk: Electropolished surface (Ra ≤0.4μm) per ASME BPE.
· 30+ Year Lifespan: Resists pitting in 100ppm chlorides (ASTM G48 Method A).
· Energy Saving: 40% higher HTC vs. welded fins (HTRI Field Data).
· Rapid Stock Delivery: 100+ FDA-compliant sizes (OD 19–63.5mm) in warehouse.
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ASTM A249 TP304 Welded Austenitic Steel Extruded Finned Tube For Heat Exchangers Images
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