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ASTM A494 CU5MCuC Globe control valve

21/03/2024 11:06:00
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ASTM A494 CU5MCuC Globe control valves

ASTM A494 CU5MCuC is a nickel-base casting alloy (UNS N08826) renowned for its exceptional resistance to severe corrosion, pitting, crevice corrosion, and stress-corrosion cracking. It is the cast equivalent of the wrought alloy Inconel 825 (UNS N08825), typically used in pump and valve manufacturing for the oil, gas, and chemical processing industries.

Quick Specifications

  • Standard: ASTM A494 / A494M
  • UNS Number: N08826
  • Common Name: Cast Inconel 825
  • Material Category: Nickel-Chromium-Molybdenum Alloy

Chemical Composition

The alloy's chemistry relies heavily on high nickel, chromium, and molybdenum with additions of copper and columbium (niobium) for enhanced corrosion resistance:

  • Nickel (Ni): 38.0% - 44.0%
  • Chromium (Cr): 19.5% - 23.5%
  • Molybdenum (Mo): 2.5% - 3.5%
  • Copper (Cu): 1.5% - 3.5%
  • Columbium (Nb): 0.6% - 1.2%
  • Iron (Fe): Balance
  • Carbon (C): ≤ 0.05% 
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