Alloy 625 is a nickel-chromium alloy which gains its stiffening effect through molybdenum and niobium additions, therefore eliminating the need for this alloy to be aged. It has superior resistance to a wide range of corrosive environments as well as the high temperature effects of oxidation and carburisation. Alloy 625 is excellent for sea-water applications, having freedom from pitting and crevice corrosion, high corrosion fatigue strength and resistance to chloride-ion stress corrosion cracking. This alloy also has high tensile, creep and rupture strength, fatigue and thermal fatigue strength and oxidation resistance, making it suitable for aircraft engine exhaust systems, housing engine controls and aircraft ducting systems. It is also used in the nuclear field for reactor cores, control rod components in nuclear water reactors.
Industry Standard Include:
ASTM B164/564
BS 3076 NA21
UNS N06625
AMS 5666
NACE MR0175/ISO15156
Werkstoff Nr. 2.4856