ASTM B163 Incoloy 825 refinery pipe
ASTM B163 Incoloy 825 refinery pipe
ASTM B163 Incoloy 825 alloy pipe is a nickel-iron-chromium alloy known for its excellent corrosion resistance, making it an ideal choice for refinery and chemical processing applications. It exhibits high strength and good mechanical properties up to approximately 550°C (1000°F), capable of withstanding a variety of corrosive media, including sulfuric and phosphoric acids. This standard specifies requirements for seamless pipe, including composition, dimensions, mechanical properties, and heat treatment (typically in the annealed condition).
What are the properties of Incoloy 825?
Incoloy 825 is a nickel-iron-chromium alloy with added molybdenum, copper, and titanium. This alloy offers excellent corrosion resistance in both moderately oxidizing and moderately reducing environments. Alloy 825 is similar to Alloy 800, but with improved resistance to aqueous corrosion.
Standards and Specifications
ASTM B163: Standard Specification for Seamless Nickel and Nickel Alloy Tubing.
UNS N08825: This is the common designation for Incoloy 825 alloy.
Material Composition: Primarily nickel, chromium, and iron, with additions of molybdenum, copper, and titanium.
Manufacturing and Properties
Seamless Tubing: ASTM B163 specifically covers seamless tubing, which is manufactured to ensure the highest quality and integrity.
Heat Treatment: This alloy is typically supplied in the annealed and tempered condition and cannot be hardened by heat treatment. Annealing increases the metal's ductility.
Mechanical Properties:
Tensile Strength: 100,000 PS (room temperature)
Yield Strength: 47,000 PS (room temperature)
Elongation: Minimum 45% (room temperature)
Mechanical Tolerances: This standard contains specific requirements for variations in outside diameter and wall thickness.
Chemical Composition of ASTM B163 UNS N08825 Tubing
| 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 Pipe
| Tensile Strength | MpaYield Strength MPa | Elongation, % |
| 586 min | 241 min | 30 min |
Physical properties of ASTM B163 UNS N08825 Tube
| Properties | Metric | Imperial |
| Density | 8.14 g/cm³ | 0.294 lb/in³ |
| Melting point | 1385°C | 2525°F |
Gnee Steel specializes in the production of various nickel-based alloys. Gnee Steel's product packaging includes steel strapping: Pipes with an outer diameter of 3 inches or less are typically strapped together with polypropylene film to prevent rust during sea transportation, and then secured with steel strapping. Wooden boxes/crates: Pipes are typically packaged in wooden boxes or crates to protect them during transportation, especially those that are longer or have larger diameters. Seaworthy export packaging: Suppliers typically use standard seaworthy export packaging methods, which may include a variety of materials and techniques to protect the pipes during transportation. Tarpaulin packaging: This prevents rain, seawater, and other external factors from penetrating the export wooden crates during transportation. Gnee Steel specializes in the production and sale of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power, automotive, and nuclear energy industries, and we can provide customized alloy material solutions based on customer needs. For alloy material pricing inquiries or customized alloy material solutions, please contact us for a quote at ss@gneesteel.com.
