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| Brand Name: | Yuhong |
| Model Number: | ASTM A179 Embedded G Finned Tube with Al1060 Fins |
| MOQ: | 200~500 KGS |
| Price: | Negotiable |
| Payment Terms: | TT, LC |
| Supply Ability: | According to Clients' requirements |
ASTM A179 Embedded G Finned Tube with Al1060 Fins For Air-cooled Heat Exchangers
The ASTM A179 Embedded G-Type Finned Tube utilizing Al1060 fins represents a specific solution to the problem of differential thermal expansion between a steel pressure boundary and an aluminum heat distribution surface.
1. Base Tube Metallurgy: ASTM A179 (Not Just "Carbon Steel")
(1). Chemical Composition Requirements (Ladle Analysis) – ASTM A179
| Element | Composition Range (%) | Metallurgical Function |
| Carbon (C) | 0.06 – 0.18 | Provides matrix strength without excessive carbide formation; maintains cold workability |
| Manganese (Mn) | 0.27 – 0.63 | Solid solution strengthener; essential for achieving tensile minimum without quench and temper |
| Phosphorus (P) | ≤ 0.035 | Controlled to minimize embrittlement; upper bound strictly enforced for cold forming |
| Sulfur (S) | ≤ 0.035 | Maintained low to prevent hot shortness and inclusion stringers during drawing |
| Silicon (Si) | ≤ 0.25 | Residual deoxidizer; not an intentional alloying addition in this grade |
(2). Mechanical & Physical Verification:
Unlike standard structural carbon steel, ASTM A179 mandates verification of drawability.
Tensile Strength (Rm): ≥ 325 MPa (47 ksi)
Yield Strength (Rp0.2): ≥ 180 MPa (26 ksi)
Elongation: ≥ 35% (in 2 inches) – This high ductility is crucial; the tube must deform locally to "backfill" the groove over the fin root without rupture.
Hardness: ≤ 72 HRB (or 72 HBW). This upper limit prevents work hardening to a degree that would make groove cutting erratic.
2. The table below breaks down its key components and characteristics about the fins:
| Component / Feature | Specification / Description | Key Details |
| Fin Material | Al1060 (Aluminum 1060) | High-purity aluminum (≥99.6%). Excellent thermal conductivity and corrosion resistance |
| Design Type | G-Type Embedded (Embedded G Fin) | Fins are tension-wound into a pre-cut spiral groove on the tube, then the groove edge is rolled back ("backfilled") to lock the fin in place mechanically |
| Operating Temp | Up to 400°C (750°F) | Some suppliers specify a max of 450°C. Superior to adhesive-bonded or wrapped fins |
| Fin Geometry | Typical Range |
Height: -17mm Thickness: 0.4mm (standard); Density: 2.1–5mm pitch (approx. 6–11 FPI) |
| .Key Advantage | Mechanical Strength & Stability | High pull-out resistance (>70N). Resists vibration, thermal cycling, and cleaning without unwinding |
3. How It Works (The “Embedded G” Difference)
Unlike "L-Type" fins which are wrapped around the tube, or extruded fins which require a bimetallic bond, the G-Type physically embeds the fin into the tube wall. This creates a near-metallurgical bond with minimal air gap, ensuring excellent heat transfer even at high temperatures where other fin types might fail due to differential expansion.
Applications of ASTM A179 Embedded G-Type Finned Tube with Al1060 Fins
This specialized heat exchanger component serves a distinct set of industrial applications where the combination of a carbon steel pressure boundary and high-purity aluminum extended surfaces provides an optimal balance of thermal performance, mechanical durability, and economic efficiency. The application scope is defined not by universal suitability, but by specific operational parameters where the G-type embedment mechanism and Al1060 fin metallurgy deliver measurable advantages over alternative fin attachment methods.
1. Air-Cooled Heat Exchangers in Hydrocarbon Processing
The predominant application for this tube configuration is air-cooled heat exchangers (ACHEs) serving the petroleum refining and petrochemical sectors
2. Power Generation Dry Cooling Systems
Air-cooled condensers in thermal and nuclear power plants represent a second major application cluster
3. Compressed Gas Cooling Systems
Reciprocating and rotary compressor intercoolers and aftercoolers routinely specify this finned tube configuration .
4. HVAC and Refrigeration Systems
Large-scale commercial and industrial HVAC installations utilize these tubes in ammonia-based refrigeration systems and chilled water applications.
5. High-Temperature Process Gas Cooling
Waste incineration facilities and steel mill flue gas handling systems employ this tube configuration for air preheaters and heat recovery equipment operating with inlet gas temperatures up to 300-400°C.
6. Natural Gas Treatment Facilities
Gas processing plants utilize these finned tubes in cooler bundles where process gas streams require temperature reduction prior to dehydration or fractionation.
