2205 Duplex Stainless Steel Pipe | Dual-Phase Powerhouse for Harsh Environments

✓ Double the Strength: Yield strength ≥450 MPa – 2x higher than 316L – enabling lighter, thinner designs.

✓ Chloride Crusher: PREN ≥34, validated by 10,000+ hours in ASTM G48 Method D seawater crevice corrosion testing.

✓ Stress Corrosion Immunity: Resists chloride-induced SCC up to 150°C (302°F) per NACE TM0177.

✓ Welding Simplified: Maintains phase balance with AWS A5.9 ER2209 filler, no post-weld heat treatment required.

2205 Duplex Stainless Steel Pipe (UNS S32205/S31803)

Engineered to deliver unmatched strength and corrosion resistance, 2205 duplex stainless steel pipe combines an austenitic-ferritic microstructure for exceptional performance in aggressive chloride and acidic environments. With 22% chromium, 5% nickel, 3% molybdenum, and 0.15% nitrogen, this dual-phase alloy outperforms standard austenitic grades in stress corrosion cracking (SCC) resistance and durability. Certified to ASTM A789/A790, NACE MR0175/ISO 15156, and ASME SA-789, it is the preferred choice for oil & gas, chemical processing, and marine applications demanding resilience under extreme pressure and corrosion.

Sizes: 1/8″ to 36″ OD (Seamless/Welded)
Wall Thickness: 0.5mm to 50mm (Schedule 5S to XXS)
Surface Finishes: Pickled & Passivated, Polished (Ra ≤0.8μm), Bead-Blasted
Mechanical Properties: Yield Strength ≥450 MPa | Tensile Strength ≥620 MPa | Elongation ≥25% | Hardness ≤290 HBW

Parameter Category	Value/Description
Material Standard	ASTM A789/A790, EN 10217-7, UNS S31803/S32205
Chemical Composition (%)	C ≤0.03, Cr 21–23, Ni 4.5–6.5, Mo 2.5–3.5, N 0.08–0.20, Mn ≤2.0, Si ≤1.0, P ≤0.03, S ≤0.02
Tensile Strength (MPa)	≥620 (Solution Annealed)
Yield Strength (MPa)	≥450 (Solution Annealed)
Elongation (%)	≥25 (in 50mm gauge length)
Hardness	Brinell (HBW): ≤290; Rockwell (HRC): ≤31 (Solution Annealed)
Density (g/cm³)	7.80
Melting Range (°C)	1350–1400
Thermal Conductivity (W/m·K)	15.0 (at 20°C)
Thermal Expansion (10⁻⁶/°C)	13.0 (20–100°C)
Electrical Resistivity (Ω·m)	0.80 × 10⁻⁶ (at 20°C)
Elastic Modulus (GPa)	200
Magnetic Permeability	Weakly magnetic (due to duplex microstructure)
Corrosion Resistance	Excellent resistance to chloride stress corrosion cracking (SCC), pitting, and crevice corrosion (PREN ≥34). Resistant to sulfuric acid, phosphoric acid, and seawater.
Heat Treatment	Solution Annealing: 1020–1100°C followed by rapid cooling (water quenching).
Surface Finishes	Seamless/Welded, Hot-rolled (black), Cold-drawn (bright), Pickled & Passivated.
Dimension Range	– OD: 6mm–1200mm – Wall Thickness: 0.5mm–50mm – Length: 1–12m (custom lengths available).
Standards & Schedules	ASTM (SCH 10S, 40S, 80S), EN (Light/Medium/Heavy Series), NORSOK MDS D45.
Key Applications	Oil & gas pipelines, chemical processing equipment, seawater systems, heat exchangers, offshore platforms, pressure vessels.

2205 Duplex Stainless Steel Pipe Applications

Industry	Critical Uses	2205 Pipe Advantage
Oil & Gas	Subsea pipelines, downhole tools	Resists H₂S-induced cracking at 10,000 ppm (NACE MR0175).
Chemical Plants	Phosphoric acid reactors, HCl evaporators	0.01mm/year corrosion rate in 40% H₂SO₄ at 60°C.
Desalination	High-pressure RO membranes, brine heaters	Withstands 30,000 ppm chloride at 80°C (176°F).
Marine Engineering	Shipboard exhaust scrubbers, ballast systems	Immune to MIC (Microbiologically Influenced Corrosion).

2205 Duplex Stainless Steel Pipe Product Packaging

2205 Duplex stainless steel pipes are engineered for critical applications in oil & gas, construction, and medical industries. To preserve surface integrity and dimensional accuracy during transit, we deploy advanced packaging systems and logistics strategies tailored for tubular products.

Why Choose Us

Where Precision Meets Partnership，25 years of focus on metal material science，Not only a supplier, but also your engineering consultant，Fast and zero compromise，Sustainable trust cycle。