S31803 pipe is known as UNS S31803, EN 1.4462, or 2205 duplex stainless steel pipe. The balanced dual-phase structure and optimized alloy composition make it integrate high strength, excellent corrosion resistance, and good processability, widely used in harsh industrial environments. HT PIPE is a astm a928 s31803 pipe supplier with 15+ export experience. Contact us for more information and quotes for free!
UNS S31803 Pipe Chemical Composition
Carbon (C): ≤0.030%
Manganese (Mn): ≤2.00%
Silicon (Si): ≤1.00%
Phosphorus (P): ≤0.030%
Sulfur (S): ≤0.020%
Chromium (Cr): 21.0% - 23.0%
Nickel (Ni): 4.5% - 6.5%
Molybdenum (Mo): 2.50% - 3.50%
Nitrogen (N): 0.08% - 0.20%
Iron (Fe): Remainder
2205 Pipe Executive Standards
ASTM A790: Standard specification for seamless and welded ferritic/austenitic stainless steel pipe
ASTM A789: Standard specification for seamless and welded ferritic/austenitic stainless steel tubing for general service
ASME B36.19: Specification for stainless steel pipes
uns s32205 tube Dimensions
Outer Diameter (OD): 6.0mm - 630mm, or customized according to customer requirements
Wall Thickness (WT): 0.3mm - 50mm, covering schedules Sch 5, Sch 20, Sch 30, Sch 40, Std, Sch 60, Sch 80, XS, Sch 120, Sch 140, Sch 160, XXS
Length: Single random length, double random length, or fixed length (e.g., 6m, 12m) as required
s31803 material Mechanical Properties
Tensile Strength: ≥620MPa
Yield Strength: ≥450MPa
Elongation: ≥25%
Hardness: ≤290HB (HRB ≤95)
2205 tubing Corrosion Resistance
Stress Corrosion Resistance: It has excellent resistance to chloride stress corrosion cracking, which is significantly better than 304L and 316L stainless steel. It can be used in high-temperature chloride-containing environments and hydrogen sulfide-containing oil and gas drilling environments.
Local Corrosion Resistance: The PREN (Pitting Resistance Equivalent Number) is ≥31, with strong resistance to pitting and crevice corrosion, suitable for seawater, brine, and acidic solution environments.
Intergranular Corrosion Resistance: The low carbon content and dual-phase structure reduce the precipitation of carbides and nitrides at grain boundaries, ensuring good intergranular corrosion resistance after welding.
Typical Applications of s31803 tube
Chemical and Petrochemical: Acetic, sulfuric, and phosphoric acid plants, cracked gas quenching systems in ethylene plants and organic synthesis processes containing chlorides.
Marine Engineering and Seawater Desalination: Seawater cooling piping systems, preheaters, pumps, and piping in seawater desalination plants; and high-pressure seawater systems on ships.
Flue Gas Desulfurization (FGD) Systems: Wet areas most susceptible to corrosion, such as the absorber spray layer, demister, and outlet flue.
Paper Industry: Equipment and piping in the pulp bleaching process (ClO₂ environment).
Pharmaceutical and Food Industries: Demanding process steps requiring extreme cleanliness and corrosion resistance.
Environmental Protection: Wastewater treatment, particularly for industrial wastewater containing high levels of chlorides, sulfides, or acidic components.
