2205 Duplex Stainless Steel Pipe (UNS S31803)
UNS S31803 Duplex Stainless Steel Pipes & Tubes
– Premium Corrosion-Resistant Solutions by Lork Group
Superior Performance of UNS S31803 Duplex Pipes & Tubes
Lork Group is a trusted global supplier of high-quality UNS S31803 duplex stainless steel pipes and tubes, offering an exceptional combination of high strength and corrosion resistance. As the most widely used duplex grade, UNS S31803 provides twice the yield strength of standard austenitic stainless steels while maintaining excellent resistance to stress corrosion cracking and pitting.
Key Characteristics & Advantages
- Exceptional Corrosion Resistance - Outstanding performance in chloride, sour, and acidic environments
- High Mechanical Strength - Yield strength approximately 2x higher than 316L stainless steel
- Stress Corrosion Cracking Resistance - Ideal for harsh oil & gas and chemical processing applications
- Good Weldability & Fabrication Properties - Suitable for complex piping systems and pressure vessels
- Cost-Effective Solution - Lower nickel content than austenitic grades provides better value
Note: Not recommended for continuous service above 300°C due to potential embrittlement
Specification
|
Type |
Cold Drawn / Welded / ERW |
|
Outer Diameter Size |
Seamless - 1/4" NB to 6" NB (Nominal Bore Size) |
|
Wall Thickness |
Schedule 10 to Schedule 160 |
|
Length |
5 to 7 Meters, 09 to 13 Meters, Single Random Length, Double Random Length And Customize Size. |
|
Ends |
Plain Ends / Beveled Ends |
|
Delivery Conditions |
As Rolled, Cold Drawn, Hot Finish, Stress Relieved, Annealed, Hardened, Tempered |
|
Coating |
Electropolish, Mechanical Polish, Satin Finish, Passivated |
|
Other Testing |
NACE MRO175, Hardness Test, Flare, Hydrostatic Test, Eddy Current test, Grain Size Test, Eddy Current, Annealed, Tempered, Stress Relieved etc. |
|
Dimension |
All Pipes Is Manufactured and Inspected / Tested to the Relevant standards including ASTM And ASME |
|
Value Added Services |
Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Heat Treatment |
|
Packaging |
Loose / Bundle / Wooden Pallet / Wooden box-a / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector |
Chemical Composition
|
Element |
Content (%) |
|
Iron, Fe |
63.75-71.92 |
|
Chromium, Cr |
21.0-23.0 |
|
Nickel, Ni |
4.50-6.50 |
|
Molybdenum, Mo |
2.50-3.50 |
|
Manganese, Mn |
2.0 |
|
Silicon, Si |
1.0 |
|
Nitrogen, N |
0.080-0.20 |
|
Carbon, C |
0.030 |
|
Phosphorous, P |
0.030 |
|
Sulfur, S |
0.020 |
Physical Properties
|
Properties |
Metric |
Imperial |
|
Density |
7.82 g/cm³ |
0.283 lb/in³ |
Mechanical Properties
|
Properties |
Metric |
Imperial |
|
Tensile strength at break |
621 MPa |
90000 psi |
|
Yield strength (@strain 0.200 %) |
448 MPa |
65000 psi |
|
Elongation at break (in 50 mm) |
25.0 % |
25.0 % |
|
Hardness, Brinell |
293 |
293 |
|
Hardness, Rockwell c |
31.0 |
31.0 |
Industrial Applications
UNS S31803 duplex pipes and tubes are extensively used in demanding environments:
Oil & Gas Industry
- Subsea pipelines and flowlines
- Downhole tubing and casings
- Process piping and heat exchangers
Chemical Processing
- Acid production equipment
- Chemical transport piping
- Pressure vessels and reactors
Pulp & Paper Industry
- Digester vessels
- Bleach plant washers
- Chip pre-steaming systems
Other Key Applications
- Desalination plants
- Flue gas cleaning systems
- Food processing equipment
- Structural components in marine environments
Hot Tags: UNS S31803, Duplex Pipe, 2205 Duplex, ASTM A790, 22Cr Duplex, Ferritic-Austenitic Pipe, High Strength Pipe, Chloride Resistant Pipe
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