Duplex Steel UNS S32205 Sheets & Plates

What are Duplex Steel UNS S32205 Sheets & Plates?

Duplex Steel UNS S32205 sheets and plates are flat-rolled products made from duplex stainless steel with a balanced austenitic and ferritic microstructure. This dual-phase structure provides a combination of high strength and excellent resistance to corrosion.

UNS S32205 is an improved version of S31803 with tighter compositional control and enhanced corrosion resistance, making it suitable for more demanding applications.

Key Functions:

• Provide high strength and structural integrity
• Resist corrosion in aggressive environments
• Ensure long service life
• Perform efficiently under pressure and stress

Chemical Composition of Duplex Steel UNS S32205

Typical Composition:

• Chromium (Cr): 22% – 23%
• Nickel (Ni): 4.5% – 6.5%
• Molybdenum (Mo): 3.0% – 3.5%
• Nitrogen (N): 0.14% – 0.20%
• Iron (Fe): Balance
• Manganese (Mn): ≤ 2%
• Silicon (Si): ≤ 1%

This composition enhances resistance to pitting, crevice corrosion, and stress corrosion cracking.

Key Features of Duplex Steel UNS S32205 Sheets & Plates

• High strength (approximately twice that of austenitic stainless steel)
• Excellent resistance to pitting and crevice corrosion
• Superior resistance to stress corrosion cracking
• Improved corrosion resistance compared to S31803
• Good weldability and fabrication
• Cost-effective due to lower nickel content
• Excellent performance in chloride-rich environments

Mechanical Properties

• Tensile Strength: ~620–880 MPa
• Yield Strength: ~450 MPa
• Elongation: ~25%
• Hardness: Moderate

Physical Properties

• Density: ~7.8 g/cm³
• Melting Range: ~1350–1450°C
• Modulus of Elasticity: ~200 GPa
• Thermal Conductivity: ~15 W/m•K
• Thermal Expansion: Lower than austenitic steels

Corrosion Resistance

Duplex Steel UNS S32205 sheets and plates provide excellent resistance to:

• Chloride-induced pitting and crevice corrosion
• Stress corrosion cracking
• Seawater and marine environments
• Industrial chemicals and acids
• Oxidizing and reducing environments

It performs significantly better than grades like 304 and 316 in aggressive conditions.

Heat Treatment

Supplied in solution-annealed condition

Process:

• Solution Annealing: ~1020–1100°C
• Rapid cooling

Weldability

UNS S32205 offers excellent weldability when proper procedures are followed.

Welding Methods:

• TIG (GTAW)
• MIG (GMAW)
• SMAW

Best Practices:

• Control heat input
• Use appropriate filler materials
• Maintain phase balance
• Avoid overheating

Machinability

• Moderate machining difficulty
• Requires rigid tooling
• Use sharp tools and proper lubrication
• Maintain controlled cutting speeds

Standards & Specifications

• ASTM A240 / ASME SA240
• UNS S32205
• EN 1.4462
• ASTM A480

Available Types of Sheets & Plates

• Hot Rolled Plates
• Cold Rolled Sheets
• Polished Sheets
• Chequered Plates
• Custom Cut Sizes

Sizes & Specifications

• Thickness: 0.5 mm to 100 mm
• Width: Up to 2000 mm
• Length: Up to 6000 mm or as required

Surface Finish Options:

• 2B Finish
• No.1 Finish
• Mirror Finish
• Matte Finish

Applications of Duplex Steel UNS S32205 Sheets & Plates

• Oil & Gas Industry – Pipelines and offshore structures
• Chemical Processing – Storage tanks and reactors
• Marine Industry – Shipbuilding and seawater systems
• Desalination Plants – Water treatment systems
• Power Plants – Heat exchangers and cooling systems
• Construction – Structural applications

Quality Testing & Inspection

• Chemical composition testing
• Mechanical testing
• Ultrasonic testing
• Surface inspection
• Positive Material Identification (PMI)

Mill Test Certificates (MTC) and third-party inspection reports are provided.

Packaging & Delivery

• Export-grade wooden packaging
• PVC coating protection
• Proper labeling and traceability
• Safe and timely delivery worldwide

Why Choose Virami Steel Hub?

• Reliable duplex steel supplier in Mumbai
• Large stock availability
• Competitive pricing
• Custom sizes and specifications
• Compliance with international standards
• Strong export presence
• Dedicated customer support

Conclusion

Duplex Steel UNS S32205 Sheets & Plates are a superior choice for applications requiring high strength and excellent corrosion resistance. With improved properties over S31803, they are ideal for harsh environments such as marine, chemical, and offshore industries.

Virami Steel Hub ensures premium quality products that deliver performance, durability, and long-term value.