F44
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Super stainless steel F44 is a high-performance stainless steel material, also known as UNS S31254 or 254SMO. It features excellent corrosion resistance and high-temperature stability, and is widely used in the chemical, petroleum, and natural gas industries.
Product name：
Low-temperature tube
Material：
Gr.6-A333
Warehouse：
Tianjin
Surface treatment：
Hot rolling
Category：
Keyword：
F44
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Details description
Chemical Composition
Mainly contains chromium (Cr) 18~20%, nickel (Ni) 17.5~18.5%, molybdenum (Mo) 6~6.5%, copper (Cu) 0.5%, nitrogen (N) 0.2%, and iron (Fe) balance. The low carbon content (C < 0.03%) provides excellent resistance to intergranular corrosion.
Physical Properties
Density is 8.24g/cm³, melting point is 1320-1390℃, non-magnetic, low thermal expansion coefficient, and moderate thermal conductivity.
Mechanical Properties
Tensile strength ≥650Mpa, yield strength ≥310Mpa, elongation ≥40%, hardness 182-223HB, with high strength and good toughness.
Performance Characteristics
Strong corrosion resistance: High chromium content forms a dense oxide film. Nickel and molybdenum elements provide excellent corrosion resistance in chloride environments, resisting pitting corrosion, crevice corrosion, and stress corrosion cracking. Copper and nitrogen elements further improve strength and corrosion resistance. It performs exceptionally well in seawater and acid containing halides.
Good high-temperature stability: Low thermal expansion coefficient,不易发生形变 at high temperatures, maintaining structural integrity and stability in high-temperature environments.
Processing Technology
It can be manufactured through traditional processes such as casting, forging, and rolling. It can also be made into seamless steel pipes through center hole punching, cold rolling, or cold drawing. However, due to the high alloy content, the processing cost is relatively high, and the welding performance is relatively poor, requiring special welding processes and welding materials.
Application Fields
Chemical industry: Used in electrolytic cells, pipelines, and valves in the chlor-alkali industry, resisting strong acids, strong alkalis, and chlorides.
Oil and natural gas industry: Used to manufacture oil well casings, oil pipelines, and refinery equipment, resisting corrosive gases such as hydrogen sulfide and carbon dioxide.
Marine engineering: A preferred material for marine platforms, submarine pipelines, and seawater desalination equipment, resisting seawater corrosion.
Other fields: It can also be used in wastewater treatment equipment in the environmental protection industry, flue gas desulfurization and denitrification devices, and containers, pipelines, and conveying equipment in the food processing and pharmaceutical industries.
Qualification certification
Corporate video
Seamless steel pipe manufacturing
3PE anti-corrosion pipe manufacturing
Spiral steel pipe manufacturing
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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