UNS N08825 seamless condenser nickel alloy tube
UNS N08825 seamless condenser nickel alloy tube
UNS N08825 seamless nickel alloy condenser tubes are made from Alloy 825 (also known as Incoloy 825), a nickel-iron-chromium alloy with added molybdenum, copper, and titanium. This alloy offers excellent corrosion resistance in a wide range of environments, meeting standards such as ASTM B163 or ASME SB-163, making it suitable for applications such as condensers and heat exchangers. The titanium helps prevent sensitization and intergranular corrosion, making it suitable for high-temperature and demanding chemical processes.
What is the difference between UNS N06625 and UNS N08825?
Inconel 625 vs. Incoloy 825 (UNS N06625 vs. UNS N08825)
The primary difference between the two materials is their nickel content. Inconel 625 contains at least 58% nickel, while Incoloy 825 has a nickel content between 38% and 46%. This makes 625 more expensive.
ASTM SB163 UNS NO8825 Chemical Composition:
| Alloy | C | Mn | Si | S | Cu | Fe | Ni | Cr | Al | Ti |
| 825 | 0.05 max | 1.00 max | 0.05 max | 0.03 max | 1.50 - 3.00 | 22.00 min | 38.00 - 46.00 | 19.50 - 23.50 | 0.02 max | 0.06 - 1.20 |
ASTM SB163 UNS NO8825 Mechanical Properties:
| Nickel Alloy | Density | Melting Range | Tensile Stress | Yield Stress (0.2%Offset) | Elongation |
| 825 | 8.14 g/cm3 | 1400 °C (2550 °F) | Psi - 80,000 , MPa - 550 | Psi - 32,000 , MPa - 220 | 30% |
ASTM SB163 UNS NO8825 Physical Properties:
| Melting point | Density / Specific Gravity |
| 1370-1400℃ | 8.1 kg/m³ 0.30 lb/in³ |
Material Standards and Grades Incoloy 825 Pipe
| ASTM Specification |
ASTM B423, ASTM B705, ASTM B829, ASTM B163, ASTM B775, ASTM B751, ASTM B704 |
|---|---|
| International Specification |
ISO 6207, DIN 17751, VdTüV 432 |
| Standard | NF, JIS, GB, EN, AISI, ASTM, TOCT, SAE, DTD, DS, ASME, DIN, AMS, |
| Size of Incoloy 825 Seamless Pipe | Wall thickness.: 0.05- 20 milimeter, 4 - 219 milimeter |
| Size of Welded Pipe | 5.0 to 1219.02 milimeter |
| size of Incoloy 825 EFW Pipe | 5.0 to 1219.02 milimeter |
| Seamless Tube Size | 3.35 milimeter To 101.6 milimeter OD |
| Incoloy 825 Welded Tube Size | 6.35 milimeter To 152 milimeter OD |
| Bwg & Swg | 18 Swg., 14 20 Swg., Swg. Swg., 12 16 Swg., 10 Swg. |
| Incoloy 825 Tubing wall thickness | 0.020" –0.220", (custom wall thicknesses available) |
| Pipe Schedule | SCH20, SCH40S, SCH80, SCH10, SCH60, SCH40, XXS, XS, STD, SCH120, SCH140, SCH80, SCH5, SCH10S, SCH160, SCH30 |
| Length | Standard & Cut length , Single Random, Double Random Pipe |
| Finish | AP (Annealed & Pickled), BA (Bright & Annealed), NO.1, 2B, Polished, MF, HL, NO.4, Mirror finish, BA, 8K etc |
| End | Plain End, Beveled End, Treaded Pipe, Screwed ends |
Key Characteristics of UNS N08825 (825 Alloy) Tubing
Composition: It is an austenitic nickel-iron-chromium alloy containing molybdenum, copper, and titanium.
Corrosion Resistance: It offers excellent corrosion resistance in both oxidizing and reducing environments and is resistant to chloride stress corrosion cracking and pitting.
Titanium Stabilization: The addition of titanium imparts resistance to intergranular corrosion, a problem that unstabilized stainless steels can develop after welding or high-temperature exposure.
Versatility: In addition to condensers, 825 Alloy can be used in a variety of demanding applications, including nuclear fuel reprocessing, oil and gas recovery, and chemical processing.
Condenser Tube Applications
Heat Exchangers: Due to its strong corrosion resistance and high-temperature capabilities, this tube is an ideal choice for condensers and heat exchangers.
Chemical Processing: Its excellent resistance to acids such as sulfuric and nitric acids enables efficient operation in various chemical and pollution control systems.
Standards and Specifications
UNS N08825: The U.S. standard designation for this alloy. ASTM B163: Standard Specification for Seamless Nickel and Nickel Alloy Condenser Tube.
ASME SB-163: Equivalent standard used in condenser and heat exchanger applications.
Gnee Steel specializes in the production and sale of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. Gnee Steel's products are widely used in aerospace, chemical, electric power, automotive, and nuclear energy applications, and we can provide customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneemetal.com.
