Here are some common applications for nickel alloys:

Inconel 625
Applications:
Aerospace components like aircraft ducting systems and engine components.
Marine and offshore applications due to its corrosion resistance in seawater.
Chemical processing equipment such as reactors and vessels.
Oil and gas industry components like downhole tools and wellhead equipment.

Hastelloy C276
Applications:
Chemical processing equipment where resistance to a wide range of corrosive environments is required.
Pollution control systems like scrubbers and stack liners.
Petrochemical processing equipment.
Pharmaceutical and food processing due to its resistance to corrosive chemicals.

Monel 400
Applications:
Marine engineering for components like propeller shafts, pump shafts, and valves.
Chemical processing equipment in environments with reducing media.
Oil and gas industry components like valves and pumps.
Aerospace applications such as airplane parts and frames.

Inconel 718
Applications:
Aerospace industry for components like turbine discs, blades, and casings.
Gas turbine engines for combustion liners and seals.
Cryogenic applications due to its strength at low temperatures.
Nuclear reactors for reactor core components.

Alloy 825
Applications:
Chemical processing industry for equipment like sulfuric acid piping and reactors.
Oil and gas industry for downhole equipment and wellhead components.
Pollution control systems in power plants and industrial facilities.
Marine engineering for components exposed to corrosive seawater.

Incoloy 800
Applications:
Furnace components like radiant tubes and heater elements in heat-treating furnaces.
Petrochemical processing for equipment exposed to high-temperature environments.
Power generation industry for heat exchangers and steam generator tubing.
Industrial heating equipment for resistance heating elements.

These applications highlight the versatility of nickel alloys in various industries where corrosion resistance, high-temperature strength, and other specific properties are required. The selection of the appropriate nickel alloy for a particular application depends on factors such as operating conditions, required performance characteristics, and cost considerations.