Carlson Alloy C 625 is a nickel-chromium-molybdenum alloy that combines high strength and oxidation resistance with excellent corrosion resistance. C 625 exhibits exceptional fatigue strength and superior strength and toughness over a wide temperature range – from cryogenic to approximately 1800°F (980°C)

The combination of high chromium and molybdenum provides excellent elevated temperature properties and outstanding aqueous corrosion resistance in a wide range of environments. Molybdenum also makes C 625 virtually immune to pitting and crevice attack in sea water and similar chloride environments.

The high nickel content of C625 provides immunity to chloride stress corrosion cracking.

C 625 is resistant to a number of corrosive environments, including sea water, phosphoric acid, organic acids, mixtures of oxidizing and reducing acids, caustic solutions and other aggressive chemicals encountered in pollution control environments.

Applications

C 625 is utilized in both high temperature and corrosive applications in chemical processing, pulp and paper, air pollution control, ore processing, waste treatment and disposal, steel pickling, marine equipment, nuclear reactor components, aerospace and gas turbines.

• Chemical Process Equipment – Phosphoric acid, nitric-sulfuric and nitric-hydrofluoric acids, hydrofluoric and fluosilicic acid mixtures, sulfuric acid, calcium chloride and magnesium chloride, pesticides, and styrene.
• Pulp and Paper – head boxes
• Air Pollution Control – power plant scrubbers, electrostatic precipitators, waste-heat recovery systems, smelting scrubbers, and scrubbers for industrial boilers and inert-gas generators.
• Ore Processing – uranium processing, copper refining, aluminum sulfate production.
• Waste Treatment and Disposal – municipal refuse incinerators, sewage sludge incinerators, chemical and toxic waste incinerators.
• Steel Pickling – hydrochloric acid
• Marine Equipment – scrubbers for inert-gas generators, submerged equipment.
• Aerospace and Gas Turbines – jet engine components, turbine blades.

Information provided by Carlson