Inconel 690

UNS N06690 nickel_superalloy
Validate composition

High-chromium nickel alloy with exceptional resistance to stress-corrosion cracking in high-purity water. Preferred material for nuclear steam generator tubing.

Applicable Standards

  • ASTM B163
  • ASTM B167
  • ASTM B168

Composition Ranges (wt %)

Element Min (%) Max (%) Typical Range
Ni 58.0 100.0 ~79.0
Cr 27.0 31.0 ~29.0
Fe 7.0 11.0 ~9.0
C — 0.05 ~0.03
Mn — 0.5 ~0.25
Si — 0.5 ~0.25
Ni 58.0–100.0% Cr 27.0–31.0% Fe 7.0–11.0% C 0.0–0.05% Mn 0.0–0.5% Si 0.0–0.5%

Typical Applications

  • Nuclear steam generator tubes
  • Chemical processing
  • High-temperature furnace components
  • Heat exchangers
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