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

Applicable Specifications

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






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