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2205 Duplex Plate

2205 duplex stainless steel plate offers exceptional strength and excellent resistance to chloride corrosion, making it ideal for marine and structural applications.

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2205 Duplex Plate

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Stainless Steel Sheet / Plate

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Product Details

2205 duplex stainless steel plate is a duplex (austenitic + ferritic) stainless steel known for its very high strength and excellent resistance to stress corrosion cracking. It is widely used in marine, chemical, and oil & gas industries where both strength and corrosion resistance are required.

Compared with 904L stainless steel, 2205 offers a different performance balance: higher strength but different corrosion behavior in highly acidic environments.

Chemical Composition of 2205 Duplex Stainless Steel

Element	Content (%)
Chromium (Cr)	22.0 – 23.0
Nickel (Ni)	4.5 – 6.5
Molybdenum (Mo)	3.0 – 3.5
Nitrogen (N)	0.14 – 0.20
Carbon (C)	≤ 0.03
Manganese (Mn)	≤ 2.0
Silicon (Si)	≤ 1.0
Iron (Fe)	Balance

Key Feature

The duplex structure (austenite + ferrite) gives 2205 its combination of high strength and excellent resistance to stress corrosion cracking.

2205 Duplex vs 904L Stainless Steel – Key Comparison

Feature	2205 Duplex Steel	904L Stainless Steel
Structure	Duplex (austenite + ferrite)	Fully austenitic
Strength	Very High (≈2× 904L)	Moderate
Corrosion Resistance	Excellent (chloride environments)	Excellent (acid environments)
Acid Resistance	Good	Superior (especially sulfuric acid)
Stress Corrosion Cracking	Very Strong resistance	Moderate resistance
Cost Level	Lower than 904L	Higher
Application Focus	Marine, structural, oil & gas	Chemical, acid service

Key Properties of 2205 Duplex Plate

1. Extremely High Strength

Nearly double the yield strength of 904L and 316L
Allows for thinner and lighter structural designs
Excellent load-bearing capability

2. Excellent Stress Corrosion Cracking Resistance

Outstanding performance in chloride-rich environments
Ideal for seawater and offshore applications

3. Good Corrosion Resistance

Strong resistance to pitting and crevice corrosion
Performs well in marine and industrial environments
Slightly weaker than 904L in strong acid environments

4. Good Weldability and Fabrication

Can be welded with proper control
Requires careful heat input management
Good overall fabrication performance

904L Stainless Steel Advantages (Comparison Reference)

While 2205 excels in strength, 904L performs better in:

Strong acidic environments (especially sulfuric acid)
Chemical processing with aggressive media
Highly corrosive chemical storage systems

Common Applications of 2205 Duplex Plate

1. Marine and Offshore Engineering

Offshore platforms
Seawater pipelines
Shipbuilding components

2. Oil and Gas Industry

Pressure vessels
Pipelines and risers
Subsea equipment

3. Chemical Industry

Moderate corrosive chemical systems
Storage tanks and reactors
Process piping

4. Structural Engineering

Bridges and structural supports
Load-bearing industrial platforms
High-strength structural components

Advantages of 2205 Duplex Stainless Steel Plate

Very high mechanical strength
Excellent resistance to chloride stress corrosion
Cost advantage over high-nickel alloys
Long service life in harsh environments
Reduced material thickness for same strength

Limitations Compared to 904L

Lower performance in strong acid environments
More sensitive to welding parameters
Not ideal for highly acidic chemical processing

Teda Ganghua – Supply Capability

Teda Ganghua supplies 2205 duplex stainless steel plates with stable quality and industrial support:

Multiple thickness and custom sizes
Precision cutting and fabrication services
Strict chemical and mechanical testing
Export packaging and logistics support
Engineering project customization

With strong supply capability, Teda Ganghua provides high-strength corrosion-resistant stainless steel solutions for marine and industrial applications.