ASTM B163 N04400 Seamless Nickel Alloy Embedded G-Type Fin Tube with Al99.5 Fin For Flue Gas Heat Recovery Equipment
ASTM B163 N04400 Seamless Nickel Alloy Embedded G-Type Fin Tube with Al99.5 Fin
I. Product Overview
●Technical Overview: Monel 4400 G-Type Finned Tubes
The ASTM B163 UNS N04400 Embedded G-Type Finned Tube is a high-performance heat exchange component engineered for aggressive environments where thermal efficiency and corrosion resistance are non-negotiable. This specific configuration utilizes a seamless Nickel-Copper alloy base tube integrated with high-conductivity aluminum fins.
● Material Specifications
Base Tube: Seamless Nickel Alloy UNS N04400 (Monel 400) manufactured to ASTM B163 standards. This alloy is renowned for its exceptional resistance to hydrofluoric acid, lye, and seawater, making it ideal for marine and chemical processing.
Fin Material: Aluminum (Al 99.5). Aluminum provides a lightweight, high-thermal-conductivity surface to maximize heat dissipation.
●The "G-Type" Embedded Construction:
The "G-Type" (Groot) finning process involves machining a shallow helical groove into the outer wall of the N04400 base tube. The aluminum fin strip is then mechanically tensioned into this groove.
● Key Advantages of G-Type Finning:
● High Thermal Stability: Because the fin is locked into the tube wall, it maintains excellent heat transfer performance at metal temperatures up to 400°C (750°F).
● Mechanical Integrity: Unlike L-foot or tension-wrapped fins, the embedded design prevents the fin from loosening due to thermal cycling or vibration
● Atmospheric Protection: The groove is backfilled during the tensioning process, providing a robust bond that resists atmospheric corrosion at the interface.
II. Chemical & Mechanical Properties
Base Tube Chemical Composition (NO4400 / Monel 400) (%)
| Element | Ni (incl. Co) | Cu | Fe (max) | Mn (max) | Si (max) | C (max) | S (max) |
| Range | 63.0–70.0 | 28.0–34.0 | 2.5 | 2.0 | 0.5 | 0.3 | 0.024 |
Fin Material Chemical Composition ( Al99.5) (%)
| Element | Al (min) | Si | Cu (max) | Mn (max) | Fe (max) | Zn (max) |
| Range | 99.50 | 0.25 | 0.05 | 0.03 | 0.4 | 0.05 |
Mechanical Properties (Base Tube – Annealed)
| Tensile Strength (min) | Yield Strength (min) | Elongation (min) |
| 480 MPa (70 ksi) | 170 MPa (25 ksi) | 35% |
III. Equivalent Materials of NO4400 (Monel 400)
|
Standard |
EN/DIN |
GB |
ISC |
UNS |
|
ASTM B163 Monel400 |
NiCu30Fe (2.4360) |
NS 6400 |
H 04400 |
UNS N04400 |
Ⅳ. Key Applications
● Marine & Offshore Engineering – Seawater cooling systems, desalination plant heat exchangers, and marine condensers, leveraging Monel 400’s excellent seawater corrosion resistance.
● Chemical Processing Industry – Heat exchangers and condensers handling aggressive media such as sulfuric acid, hydrofluoric acid, and other corrosive chemicals.
● Oil & Gas – Air-cooled heat exchangers in hydrotreating units, hydrocarbon processing, and equipment resistant to hydrogen sulfide (H₂S) and sour gas environments.
● Power Generation – Steam condensers, boiler feed water heaters, and flue gas waste heat recovery systems in power plants.
● HVAC & Refrigeration – High-efficiency air-cooled heat exchangers in industrial refrigeration and HVAC systems, especially where compact design is needed.
● Waste Heat Recovery – Capturing industrial waste heat in steel mills, chemical plants, and other energy-intensive facilities to improve overall thermal efficiency.
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