Inconel 690 alloy Characteristic
Inconel 690 is a high-Chromium nickel alloy, which is a excellent resistance to fluoride containing hot nitric acid, to stress corrosion cracking caused by alkalis and media containing chloride and polythionic acids, and to many aggresstive aqueous media or in the primary and secondary loops of nuclear reactors. And good resistance to oxidation, sulphidation and metal dusting in hot gases.
Inconel 690 alloy chemical composition:
Ni: ≥58.0
Cr: 27.0-31.0
Fe: 7.0-11.0
C: ≤0.05
Si: ≤0.50
Mn: ≤0.50
S: ≤0.015
Cu: ≤0.50
Fabrication for Inconel 690 alloy:
INCONEL 690 alloy is readily fabricated by converntional techniques for high-nickel alloys. In most working operations, alloy 690 exhibits characteristics similar to those of INCONEL 600. Inconel 690 should be clean before it is heated and should be heated in a low sulfur atmosphere. Furnace atmospheres for open heating should also be slightly reducing to prevent excessive oxidation of the material.
