Incoloy 825 Properties
Incoloy 825/ UNS N08825/ DIN W.Nr. 2.4858 is a nickel iron chromium alloy with molybdenum, copper and titanium. The nickel content is sufficient for resistance to chloride-ion stress corrosion cracking. The molybdenum is resistance to pitting and crevice corrosion. The alloy’s chromium contents confers resistance to a variety of oxidizing substances such as nitric acid, nitrates and oxidizing salt. The alloy 825 is applicate to nuclear fuel reprocessing, oil and gas, chemical processing, petrochemical piping, pollution-control equipment.
Incoloy 825 corrosion
Incoloy alloy 825 is high level of corrosion resistance. In both reducing and oxidize environments. the alloy resists general corrosion, pitting, crevice corrosion, intergranular corrosion, and stress-corrosion cracking.
Fabrication for UNS N08825
Incoloy alloy 825 are products are heat treated during manufacturing all the mill to develop the optimum combination of stabilization, corrosion resistance, mechanical properties, and formability. To maintain these properties during fabrication, subsequent anneals should be performed between 1700 to 1800℉(930 to 980℃) followed by rapid air cooling or water quenching. Heat treatment in the lower end of the range is acceptable for stabilization. However, annealing at temperatures in the higher end of this range may be preferred for softness and grain structure for forming and deep-drawing while maintaining corrosion resistance. Quenching is usually not necessary for parts of thin cross section, but may be desired to avoid sensitization in products of heavier cross section.
Hot and Cold Forming
The hot working range for alloy 825 is 1600 to 2150℉(870 to 1180℃). For optimum corrosion resistance, final hot working should be done at temperatures between 1600 and 1800℉(870 and 980℃).
