Inconel 625 alloy
Inconel625 alloy is a solid solution-strengthened nickel-based deformed high-temperature alloy with molybdenum and niobium as the main strengthening elements. It has excellent corrosion resistance and oxidation resistance. It has good tensile properties and fatigue properties from low temperature to 980°C, and is resistant to Stress corrosion in salt spray atmosphere. Therefore, it can be widely used in manufacturing aerospace engine parts, aerospace structural components and chemical equipment. This alloy is used to manufacture parts such as engine casings, guide vanes, mounting edges and barrels, and fuel main pipes. It has passed practical application assessments and has a maximum operating temperature of 950°C. The alloy has a certain aging effect after long-term use at 550 to 700°C. The hardening phenomenon leads to some decrease in the plasticity of the alloy.
Alloy Properties
1. It has excellent corrosion resistance against various corrosive media in oxidizing and reducing environments.
2. Excellent resistance to pitting corrosion and crevice corrosion, and will not produce stress corrosion cracking caused by chloride
3. Excellent resistance to inorganic acid corrosion, such as nitric acid, phosphoric acid, sulfuric acid, hydrochloric acid and mixed acids of sulfuric acid and hydrochloric acid, etc.
4. Excellent resistance to corrosion by various inorganic acid mixed solutions
5. When the temperature reaches 40°C, it can show good corrosion resistance in hydrochloric acid solutions of various concentrations.
6. Good processability and weldability, no post-weld cracking sensitivity
7. Manufacturing certification of pressure vessels with wall temperature between -196~450℃
8. Certified by the NACE standard of the American Society of Corrosion Engineers (MR-01-75) to meet the highest standard level VII for use in sour gas environments.
Application areas
Low carbon alloy 625 after soft annealing is widely used in the chemical process industry. Its good corrosion resistance and high strength enable it to be used as thin structural components. Alloy 625 can be used in applications where it is exposed to seawater and is subject to high mechanical stress. Typical application areas:
1. Components of organic chemical processes containing chlorides, especially where acidic chloride catalysts are used
2. Digesters and bleaching tanks for manufacturing pulp and paper industry
3. Absorption tower, reheater, flue gas inlet baffle, fan (humidity), agitator, guide plate and flue in the flue gas desulfurization system
4. For manufacturing equipment and components used in sour gas environments
5. Acetic acid and acetic anhydride reaction generator
6. Sulfuric acid condenser
