Nickel Alloy Pipes Grade 925 Incoloy Seamless Nickel Alloy Tubes

Material Description

• Alloy Name: Incoloy 925 (also known as UNS N09925)
• Chemical Composition:
  • Nickel (Ni): 42-46%
  • Chromium (Cr): 19.5-22.5%
  • Iron (Fe): Balance
  • Molybdenum (Mo): 2.5-3.5%
  • Copper (Cu): 1.5-3%
  • Titanium (Ti): 1.9-2.4%
  • Aluminum (Al): 0.1-0.5%
  • Other Elements: Trace amounts of manganese, silicon, sulfur, and carbon

Characteristics

• High Strength and Toughness: Incoloy 925 offers excellent mechanical properties, including high tensile and yield strength, due to its age-hardening elements like aluminum and titanium.
• Excellent Corrosion Resistance: Provides outstanding resistance to general corrosion, pitting, crevice corrosion, and stress corrosion cracking in various environments, including sour gas (H2S) environments.
• Good Weldability and Fabricability: Can be welded and fabricated using standard techniques, making it versatile for various applications.
• High Resistance to Oxidation: Maintains its properties even in high-temperature environments.

Physical Properties

• Density: 8.08 g/cm³
• Melting Point: Approximately 1350-1400 ℃
• Tensile Strength: ≥ 827 MPa
• Yield Strength: ≥ 517 MPa
• Elongation: ≥ 30%
• Hardness: Typically around 22 HRC (Rockwell Hardness)

Applications

1. Oil and Gas Industry: Used in downhole and surface gas well components, including tubing, valves, and fittings, due to its resistance to sulfide stress cracking and general corrosion.
2. Chemical Processing: Utilized in equipment exposed to corrosive environments, such as heat exchangers, reactors, and pressure vessels.
3. Marine Engineering: Suitable for components exposed to seawater and marine environments, offering excellent resistance to saltwater corrosion.
4. Aerospace: Used in various aerospace components that require high strength and resistance to oxidation and corrosion.
5. Power Generation: Employed in components such as steam generators and reactor cores where high strength and corrosion resistance are critical.

Manufacturing and Processing

• Manufacturing Method: Seamless pipes are manufactured through extrusion and cold drawing processes, ensuring high precision and superior surface quality.
• Processing: Incoloy 925 can be processed using conventional cutting, welding, and forming techniques. It is important to use appropriate welding practices to maintain the material's properties.

Dimensions and Specifications

• Outer Diameter Range: Typically from 6 mm to 273 mm.
• Wall Thickness: Ranges from 0.5 mm to 15 mm.
• Length: Typically 6 meters, 12 meters, or customized according to client requirements.

Surface Treatment

• Pickling: Removes surface oxides and impurities.
• Polishing: Provides a smooth surface to meet specific application requirements.
• Passivation: Enhances corrosion resistance by forming a protective oxide layer on the surface.

Summary

Chemical Composition(%):