Ni-Cu 400

UNS #N04400

Ni-Cu 400 is a nickel-copper solid solution binary alloy combining high strength (comparable to structural steel) and toughness over a wide temperature range with excellent resistance to many corrosive environments. Used at temperatures up to 800°F (427°C), and as high as 1000°F (538°C) in sulfur-free oxidizing atmospheres, it also displays excellent mechanical properties at sub-zero temperatures since it does not undergo a ductile-to-brittle transition. Ni-Cu 400 is strengthened by cold work and readily fabricated.

Type Analysis

  • Carbon (Maximum) 0.3
  • Silicon (Maximum) 0.5
  • Nickel (Nominal) 63.00-70.00
  • Manganese (Maximum) 2
  • Sulfur (Maximum) 0.024
  • Iron (Nominal) 2.5
  • Copper (Nominal) Balance


valves and pumps, pump and propeller shafts, marine fixtures and fasteners, chemical processing equipment, gasoline and fresh water tanks, crude petroleum stills, process vessels and piping, boiler feedwater heaters, heat exchangers, and deaerating heaters

Applicable Specifications

  • AMS 7233C
  • QQ-N-281D
  • ASTM B164





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