ASTM B163 Alloy UNS N08825 Refinery Pipe
ASTM B163 alloy UNS N08825 (Incoloy 825) is a high-performance seamless nickel-iron-chromium alloy tube designed to withstand highly corrosive refinery and chemical processing environments. It is most commonly used in heat exchangers and condensers, but is also suitable for a variety of refinery applications involving corrosive chemicals.
What are Inconel 825 used for?
Inconel 825 alloy offers excellent resistance to general and localized corrosion under a wide range of conditions, making it suitable for a wide range of applications. Applications include chemical processing, pollution control, oil and gas recovery, acid production, pickling operations, nuclear fuel reprocessing, and radioactive waste disposal.
Chemical Composition of ASTM B163 Alloy 825 Refinery Pipe
| C | MN | S | Si | Cr | Ni | Mo | Cu | Ti | Al | Fe | Other |
| 0.05 max | 1.0 max | 0.03 max | 0.5 max | 19.5 - 23.5 | 38.0 - 46.0 | 2.5 - 3.5 | 1.5 - 3.0 | 0.6 1.2 | 0.2 max | 22.0 min | 3.15 4.15 |
Mechanical Strength of Astm B163 UNS N08825 Refinery Pipe
| Tensile Strength | MpaYield Strength MPa | Elongation, % |
| 586 min | 241 min | 30 min |
Physical properties of ASTM B163 Alloy 825 Refinery Pipe
| Properties | Metric | Imperial |
| Density | 8.14 g/cm³ | 0.294 lb/in³ |
| Melting point | 1385°C | 2525°F |
ASTM B163 Specification Requirements
ASTM B163 covers the requirements for seamless tubing made from nickel and nickel alloys (including UNS N08825) specifically for use in heat exchangers and condensers. Key requirements include:
Seamless Construction: This specification applies to seamless tubing, typically manufactured using cold rolling or cold drawing processes.
Chemical Analysis: Manufacturers must verify the chemical composition to ensure it meets the limits for all specified elements.
Mechanical Testing: Products must undergo tensile strength, yield strength, elongation, and hardness testing to meet specified mechanical property requirements.
Nondestructive Testing: Each tube must undergo hydrostatic testing or nondestructive electrical testing to ensure it is free of leaks and other defects.
Dimensional Tolerances: Tubes must meet strict limits for outside diameter, wall thickness, and length.
Common Refinery Applications
UNS N08825's excellent corrosion resistance makes it an ideal material for the harsh conditions found in refineries and chemical plants. Applications include:
Heat exchangers and condensers: This is the primary use for tubing conforming to ASTM B163.
Sulfuric and phosphoric acid applications: The alloy's resistance to these acids makes it an ideal choice for piping and vessels used in acid production and handling processes.
Flue gas scrubbers: Used in pollution control systems to remove harmful sulfur-containing emissions.
Oil and gas well components: Suitable for sour wells with high hydrogen sulfide (H2S) environments, as well as chemical injection and hydraulic systems.
Nuclear fuel reprocessing: Its resistance to highly corrosive media is crucial for handling radioactive waste.
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.
