Nickel Alloy Extruded Fin Tube , ASTM B163 NO8825 Incoloy 825 Heat Exchanger Application
| Attribute | Value |
|---|---|
| Base Tube Material Grade | NO8825, Incoloy825 |
| Base Tube Material Standard | ASTM B163, ASME SB163 |
| Type | Straight Tube, U Bend Tube, Coil Tube |
| Application | Air cooler, Cooling Tower, Heat Exchanger, Condenser |
| Fin type | Extruded Fin tube, Aluminum Extruded Fin tube, Fin tube |
| Fin Material | Aluminum, Copper, Stainless Steel, Carbon Steel |
Nickel Alloy Extruded Fin Tube, ASTM B163 NO8825 Incoloy 825 Heat Exchanger Application
NO8825 is a nickel-iron-chromium alloy with the addition of molybdenum and copper. The chemical composition of this nickel steel alloy is designed to provide superior resistance to many corrosive environments. It is similar to Alloy 800 but has higher water corrosion resistance. It has excellent resistance to reducing and oxidizing acids, stress corrosion cracking, and localized corrosion such as pitting and crevice corrosion. Alloy 825 Incoloy 825 is particularly resistant to sulfuric and phosphoric acid. This nickel steel alloy is used in chemical processing, pollution control equipment, oil and gas well piping, nuclear fuel reprocessing, acid production and pickling equipment.
The aluminum fin strip is tension wound and placed into a groove cut into the tube with approximately 0.4mm fluted depth.
The common application fields are:
- Heat exchangers units for power plant (electric, nuclear, thermal and geothermal power plants)
- High corrosive systems (condensers, evaporators, sea water desalinations, fertilizing, urea systems, ammonia, gas, corrosive acids)
- The petroleum, chemical and petrochemical industries
- The food processing and refrigeration industries
- Natural gas treatment
| Element | Ni | Cr | Mo | Cu | Ti | Fe | C | Mn | S | Si | Al |
|---|---|---|---|---|---|---|---|---|---|---|---|
| % | 38.0-46.0 | 19.5-23.5 | 2.5-3.5 | 1.5-3.0 | 0.6-1.2 | 22.0 min (~33%) | 0.05 max | 1.0 max | 0.03 max | 0.5 max | 0.2 max |
| Density / Specific Gravity | Melting Point |
|---|---|
| 8.1 kg/m³ 0.30 lb/in³ | 1370-1400℃ |
| Alloy State | Tensile Strength (Rm N/mm²) | Yield Strength (R P0.2N/mm²) | Elongation (A 5 %) | Brinell Hardness (HRB Max) |
|---|---|---|---|---|
| N08825 Hot Finished | 517 | 172 | 30 | 200 |
| N08825 Cold Finished | 586 | 241 | 30 | 200 |
Pipe Diameter: Min. OD 20mm to Max. OD 219mm.
Tube Thickness: Min. 2mm to 16mm
Pipe material: stainless steel, alloy steel, carbon steel, Corten steel, duplex steel, super duplex steel, Inconel, high chromium high nickel and some materials such as Incolloy, CK 20 material.
Fin Thickness: Min. 0.8 mm to max. 4 mm
Fin Height: 0.25" (6.35 mm) minimum to 1.5" (38 mm) maximum
Fin Density: Minimum 43 fins per meter, maximum 287 fins per meter
Materials: Carbon Steel, Stainless Steel, Alloy Steel, Weathering Steel, Duplex Steel and Incolloy.
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