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Hastelloy C276 Pipe Specification: Everything You Need to Know

Hastelloy C276 pipes

Hastelloy C276 is a popular nickel-molybdenum-chromium alloy known for its exceptional corrosion resistance in various environments. Understanding Hastelloy C276 pipe specifications is crucial when selecting the right pipe for corrosive applications. This comprehensive Guide will delve into the specifications of Hastelloy C276 pipes, helping you make informed decisions for your projects.

Overview of Hastelloy C276

Hastelloy C276 is a versatile alloy with excellent resistance to oxidizing and reducing environments. It contains nickel, molybdenum, chromium, and small amounts of tungsten and iron, providing superior corrosion resistance in corrosive media such as sulfuric acid, hydrochloric acid, and seawater. Hastelloy C276 is widely used in chemical processing, oil and gas, and pulp and paper industries.

Hastelloy C276 Pipe Specifications

Material Composition

  • Nickel (Ni): 57%
  • Molybdenum (Mo): 16%
  • Chromium (Cr): 16%
  • Iron (Fe): 5%
  • Tungsten (W): 3.5%
  • Carbon (C): 0.01% max
  • Silicon (Si): 0.08% max
  • Manganese (Mn): 1% max

Mechanical Properties

  • Tensile Strength: 100 ksi (690 MPa) minimum
  • Yield Strength (0.2% Offset): 41 ksi (283 MPa) minimum
  • Elongation: 40% minimum
  • Hardness: Rockwell C 28 maximum

Pipe Dimensions

  • Nominal Pipe Size (NPS): 1/8″ to 12″
  • Schedule: Sch 10, Sch 40, Sch 80, Sch 160, XXS
  • Length: Single random, double random, or custom lengths
  • End Connections: Plain end, bevelled end, threaded, or socket weld

Standards and Specifications

  • ASTM B622: Standard Specification for Seamless Nickel and Nickel-Cobalt Alloy Pipe and Tube
  • ASME SB622: Specification for Seamless Nickel and Nickel-Cobalt Alloy Pipe and Tube
  • UNS N10276: Unified Numbering System designation for Hastelloy C276

Selecting Hastelloy C276 Pipes

When selecting Hastelloy C276 pipes and tubes for your application, consider the following factors:

  • Corrosive Environment: Assess the specific corrosive media and conditions to which the pipes will be exposed.
  • Operating Temperature: Determine the temperature range the pipes will need to withstand.
  • Pressure Requirements: Consider the pressure rating required for your application.
  • Size and Dimensions: Choose the appropriate pipe size, schedule, and length for your project.

Common Applications of Hastelloy C276 Pipes

Hastelloy C276 pipes are widely used in various industries, including:

  • Chemical Processing: Chemical reactors, distillation columns, and piping systems.
  • Oil and Gas: Downhole equipment, piping, and heat exchangers in sour gas environments.
  • Pulp and Paper: Bleach plant digesters, evaporators, and liquor tanks.
  • Waste Treatment: Pollution control equipment, scrubbers, and ducting.

Hastelloy C276 pipes offer exceptional corrosion resistance and mechanical properties, making them ideal for demanding applications in corrosive environments. By understanding the specifications and characteristics of Hastelloy C276 pipes, you can ensure reliable performance and longevity in your projects.