NS3308
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NS3308 is a fully austenitic nickel-based corrosion-resistant alloy, commercially known as Hastelloy C-22. It possesses excellent corrosion resistance and high-temperature stability, and is widely used in the chemical and energy industries.
Product name：
Precision bright tube
Material：
20#
Warehouse：
Tianjin
Surface treatment：
Cold rolling
Keyword：
NS3308
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Details description
Chemical Composition
Nickel (Ni) based, with Chromium (Cr) content of 20.0% - 22.5%, Molybdenum (Mo) content of 12.5% - 14.5%, Tungsten (W) content of 2.5% - 3.5%, Iron (Fe) content of 2.0% - 6.0%, Carbon (C) ≤0.015%, Silicon (Si) ≤0.08%, Manganese (Mn) ≤0.50%, Phosphorus (P) ≤0.040%, Sulfur (S) ≤0.020%, Vanadium (V) ≤0.35%.
Physical Properties
Density: 8.69g/cm³, Melting point: 1359 - 1399℃, Specific heat capacity: 417 - 444J/kg・K, Thermal conductivity: 10.1 - 15.5W/(m・K), Elastic modulus: 205000MPa.
Mechanical Properties: Tensile strength ≥690MPa, Yield strength ≥283MPa, Elongation ≥40% at room temperature. Excellent high-temperature performance, tensile strength maintained at 400 - 500MPa at 600℃, and exceeding 300MPa at 800℃.
Corrosion Resistance: Exhibits good resistance to aqueous solution corrosion and high-temperature erosion. It can withstand chloride ion corrosion and demonstrates good corrosion resistance in acetic acid, formic acid, phosphoric acid, and some concentrations of sulfuric acid. It also possesses a degree of corrosion resistance in hydrochloric acid. Furthermore, it shows good resistance to humid gases, hypochlorite, and chlorine dioxide solution corrosion, and significant corrosion resistance to high concentrations of chloride salt solutions (such as ferric chloride and cupric chloride).
Processing and Welding Properties: Hot working deformation is relatively difficult; processing temperature is 1000 - 1200℃. Good cold working performance in the solution-treated state. Heat treatment temperature is 1120℃ with rapid cooling. Good weldability.
Application Fields
Primarily used in seawater, acetic acid, hydrochloric acid, wet-process phosphoric acid, and acid pickling solutions using mixed acids. It can be used to manufacture equipment such as containers, pipes, valves, pumps, and plate heat exchangers, effectively addressing problems such as uniform corrosion, pitting corrosion, and crevice corrosion, especially suitable for environments with high chloride ion content and oxidants.
Qualification certification
Corporate video
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Application fields
Petrochemicals
Petrochemicals
Aerospace
Aerospace
Energy equipment
Energy equipment
Oil/gas/water pipelines
Oil/gas/water pipelines
Building construction
Building construction
Dredging & piling works
Dredging & piling works
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