2205 (UNS S31803 / S32205 /1.4462) Duplex Stainless Steel Round Bar

• Widely used duplex stainless steel grade 2205 (UNS S32205, W.Nr 1.4462) with balanced austenite-ferrite dual-phase microstructure
• Nearly double yield strength compared to conventional 304 / 316L austenitic stainless steel
• Superior resistance to chloride pitting, crevice corrosion and stress corrosion cracking (SCC)
• Low-carbon design minimizes intergranular corrosion after welding, excellent weld performance
• Outstanding corrosion fatigue & erosion resistance for seawater, brine and acid media
• Custom hot rolled / hot forged & precision CNC machining per customer CAD drawings
• Manufactured in strict accordance with ASTM A276, ASTM A479, EN 10088 international standards
• Lightweight structural design available, lower long-term maintenance cost

This series of 2205 duplex stainless steel round bars are hot forged and hot rolled solid alloy rods produced with premium UNS S32205 duplex stainless steel raw material. After solution annealing rapid cooling treatment, the material forms uniform dual-phase grain structure, delivering combined advantages of ferritic and austenitic stainless steel.

2205 is the most popular economical duplex grade. It integrates high mechanical strength and outstanding chloride corrosion resistance, outperforming 316L in marine, desalination and chemical sour service environments. It allows thinner structural design while retaining long-term anti-corrosion stability, ideal for high-load corrosion-resistant mechanical blanks, shafts and fasteners.

• Dual-phase stainless steel containing 22Cr-5.5Ni-3Mo-N, balanced ferrite & austenite phases
• Twice the yield strength of standard 304/316L, greatly reducing component section size and weight
• Molybdenum & nitrogen alloy elements greatly improve local corrosion resistance in chloride-rich water
• Excellent anti-corrosion fatigue performance under alternating load + corrosive medium working conditions
• Good toughness at low temperature, suitable for outdoor marine and cryogenic chemical equipment
• Low carbon content avoids carbide precipitation during welding, no post-weld heat treatment required generally

• Duplex Stainless Steel: 2507, S32750, S32760, F51, F55, F60
• Austenitic stainless steel: 304,304L,316L,321,347,904L,254SMo,253Ma,A286
• Precipitation Hardening Stainless Steel: 17-4PH,15-5PH,17-7PH
• Special nickel alloys: Monel 400/K-500, Inconel 600/625/718, Hastelloy C22/C276, Incoloy 800/825/925
• Alloy steel: 4140, 4340, F11, F22, F91,42CrMo
• Carbon steel:A105,A516 Gr.70,A36,S235JR,P235GH

1. Ultra-High Mechanical Strength

   Double yield strength compared to regular austenitic stainless steel, allows thinner structural design, reduces material weight and overall equipment cost.

2. Outstanding Chloride Corrosion Resistance

   Excellent resistance to pitting, crevice corrosion and stress cracking in seawater, brine, desalination and chloride-containing chemical fluid, far superior to 316L.

3. Reliable Weld Performance

   Low carbon composition restricts carbide precipitation during welding, effectively avoids intergranular corrosion; stable mechanical properties after welding without extra heat treatment.

4. Superior Corrosion Fatigue Resistance

   Combination of high strength and anti-corrosion capacity performs stably under cyclic load plus corrosive medium, perfect for pump shafts, marine transmission parts.

5. Long Service Life & Low Maintenance

   Resist erosion and long-term oxidation in harsh industrial environments, extend component service cycle and lower replacement & maintenance expense.

• Seawater desalination equipment, offshore marine platform structural shafts & fasteners
• Chemical reactor, acid pump shafts, valve trim and heat exchanger components
• Oil & gas sour water gathering system, downhole corrosion resistant fittings
• Pulp & paper bleaching equipment, chlorine-containing processing machinery parts
• Marine ship pipeline connectors, seawater cooling system blanks
• Water treatment wastewater desulfurization and corrosion-resistant transmission components
• Food & beverage high-salt processing mechanical parts

We provide integrated hot rolling, hot forging and full precision machining services, and can produce finished components strictly according to customer drawings:

• Fixed-length cutting, peeling, surface grinding & polishing
• CNC Turning, Milling, Planing, Drilling, Boring, Threading
• Custom solution annealing heat treatment, passivation surface treatment
• Gear cutting, special irregular profile forming

We supply finished alloy shafts, piston blanks, flanges, rings, fasteners and bearing parts to global industrial customers.

• UT Ultrasonic Testing for internal rolling & forging crack defects
• Tensile & hardness testing machine to verify mechanical indicators
• High-precision dimensional measuring instrument for tolerance inspection
• Spectrometer full spectrum chemical composition inspection per batch
• Metallographic microscope dual-phase microstructure analysis

Mill Test Certificate EN 10204 3.1 can be issued and delivered together with shipment documents.

• Inner layer: waterproof anti-rust polybag to prevent moisture & scratch
• Outer layer: reinforced fumigated wooden case / wooden pallet for long-distance sea transportation
• Custom special packaging scheme available upon request

Normally 10 – 45 days after receiving advance payment Exact delivery time depends on order quantity, bar diameter, length and extra machining & heat treatment requirements

Please inform us your required bar diameter, length, surface finish and machining drawings. Our professional engineering team will send competitive factory price within 24 hours. Free material matching and technical consulting service for all buyers.