ASTM B163 N08825 Extruded Finned Tube with Al1060 Fins for Refinery Air Coolers

Product Overview

YuHong’s ASTM B163 N08825 extruded finned tube combines the strong corrosion resistance of an Incoloy 825 (UNS N08825) base tube with the high thermal conductivity of Al1060 aluminum fins, using precision cold extrusion. This high-performance composite heat transfer component is engineered for reliable, efficient thermal management in demanding industrial settings where corrosive media, high temperatures, and a long service life are essential.

Here are some detailed Breakdowns:

1. Base Tube: ASTM B163 UNS N08825 (Incoloy 825) Seamless Tube

Chemical Composition (wt %)

ASTM B163 UNS N08825 (Incoloy 825) Seamless Tube

Mechanical Properties (Solution Annealed Condition, Room Temperature)

Typical Physical Properties

• Density: 8.14 g/cm³
• Melting Range: 1370 – 1400 °C
• Modulus of Elasticity: 196 GPa
• Thermal Conductivity: 11.1 W/m·K
• Coefficient of Thermal Expansion: 14.0 µm/m·°C (20 – 100 °C)

2. Key Performance Properties of ASTM B163 UNS N08825 (Incoloy 825) Seamless Tube:

• Superior Corrosion Resistance: Outstanding defense against both oxidizing and reducing acids (sulfuric, phosphoric), chloride-induced stress corrosion cracking, pitting, and crevice corrosion—ideal for sour gas, chemical processing, and marine conditions.
• Mechanical Strength: Excellent tensile and yield strength at both ambient and elevated temperatures (up to 540°C / 1000°F), with stable ductility and impact resistance.
• Structural Integrity: Full seamless tube construction ensures zero weak points, with high resistance to thermal shock and mechanical vibration.

3. Fin Material: Al1060 (Pure Aluminum)

Core Advantages:

• Ultra-High Thermal Conductivity: Maximizes heat exchange efficiency between the tube wall and process medium.
• Lightweight & Durable: Reduces overall component weight while maintaining structural rigidity.
• Corrosion Protection: Forms a stable, self-passivating oxide layer that shields the base tube from external oxidation and moisture penetration.

4. Key Performance Advantages

• Unmatched Corrosion Resilience: N08825 base tube withstands harsh chemical and high-temperature environments; Al1060 fins provide secondary barrier protection—delivering extended service life in aggressive applications.
• Maximized Heat Transfer Efficiency: Expanded external surface area (up to 15x the bare tube) combined with low thermal resistance yields significantly higher thermal performance than plain tubes.
• Superior Mechanical Durability: Resists thermal cycling, vibration, and mechanical shock; fins maintain structural integrity under frequent temperature fluctuations.
• Design Flexibility: Fully customizable fin parameters and tube dimensions to match project-specific heat duty, pressure, and space constraints.
• Low Maintenance & Longevity: Minimized fouling tendency and corrosion-related degradation reduce downtime and lifecycle costs.

5. Typical Industrial Applications

This product is engineered to be a high-reliability, high-efficiency solution for critical heat transfer applications where corrosion resistance and thermal performance are paramount—delivering consistent performance and value in the world’s toughest industrial operating conditions.

• Oil & Gas (Upstream & Downstream): Air-cooled heat exchangers, gas coolers, and condensers for offshore platforms, refineries, and petrochemical plants (especially compatible with PETRONAS and similar industry requirements).
• Chemical Processing: Heat exchangers handling sulfuric acid, phosphoric acid, chlorides, and other corrosive process fluids.
• Power Generation: Waste heat recovery units, boiler auxiliary heat exchangers, and industrial thermal systems.
• Marine & Offshore: Seawater-cooled condensers, desalination equipment, and marine HVAC systems.
• Pollution Control & Industrial Waste Treatment: Scrubbers, evaporators, and thermal processing units operating in corrosive exhaust environments.