Womic Stainless Steel Co., Ltd
Common duplex stainless steel pipe grades supplied by Womic include:
S31803 / S32205 (2205)
S32750 (2507)
S32760
S31500
S32001 / S32003
S32304
S32900 (329)
|
ASTM Specification |
ASTM A790 ASME SA790 |
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Standard |
ASTM,ASME,JIS,AISI,AMS,EN,SAE,DIN,NF,TOCT,DS,DTD,GB |
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Duplex S31803 Pipe Size |
Ф12mm toФ630mm |
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Swg &Bwg |
12 Swg.,10 Swg.,16 Swg.,14 Swg.,20 Swg.,18 Swg., |
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Duplex 31803 Pipe Schedule |
XS,SCH30,SCH40,XXS,SCH80,SCH120,SCH60,SCH140,STD,SCH10,SCH10S,SCH40S,SCH80,SCH20,SCH5,SCH160 |
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Duplex UNS S31803 pipe Length |
Double Random,Single Random,Standard &Cut length Pipe |
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Finish of UNS S31803 Alloy Pipe |
Polished,AP (Annealed &Pickled),BA (Bright &Annealed),MF,NO.1,NO.4,2B,BA,HL,8K,Mirror finish,etc |
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Type of UNS S31803 Alloy Pipe |
Seamless / Welded |
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Duplex UNS S31803 pipe End |
Plain End,Beveled End,Treaded Pipe,Screwed ends |
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Marking on Duplex UNS S31803 Pipe |
All ASTM A790 Duplex UNS S31803 Pipes are marked as follows:Standard,Grade,OD,Thickness,Length,Heat No. (Or according to the customer’s request.) |
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Application of Duplex UNS S31803 Pipe |
Dairy Pipe,Oil Pipe,Gas Pipe,Fluid Pipe,Boiler Pipe for Chemical Industry |
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Value Added Service |
Draw &Expansion as per required Size &Length,Polish (Electro &Commercial) Annealed &Pickled Bending,Machining Etc. |
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Specialize in |
Large Diameter Duplex UNS S31803 Pipe |
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We can also cut,thread,and groove UNS S31803 Pipe to meet your specifications. Duplex UNS S31803 pipe Dimension ANSI/ ASME B36.10,B36.19,B2.1 |
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Duplex stainless steels (also known as austenitic–ferritic stainless steels) combine the advantages of both structures:
Higher plasticity and toughness than ferritic stainless steels
Improved weldability and resistance to intergranular corrosion
Higher yield strength, fatigue resistance, and wear resistance than austenitic stainless steels
Excellent resistance to stress corrosion cracking and corrosion fatigue
Thermal expansion coefficient close to carbon steel, making it suitable for dissimilar metal connections and clad plates
Typical chemical composition ranges include:
Chromium: 18–28%
Nickel: 3–10%
Optional alloying elements: Mo, Cu, Nb, Ti, N
Chemical Material Composition of Duplex UNS S31803 Pipe：
|
Grade |
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Mo |
N |
|
max |
max |
max |
max |
- |
- |
- |
- |
- |
|
|
UNS S32750 |
0.03 |
0.8 |
1.2 |
0.03 |
0.015 |
24.0-26.0 |
6.0-8.0 |
3.0-5.0 |
0.24-0.32 |
|
UNS S31803 |
0.03 |
1 |
2 |
0.02 |
0.02 |
21.0-23.0 |
4.5-6.5 |
2.5-3.5 |
0.08-0.20 |
|
UNS S31500 |
0.03 |
1 |
1.2-2.0 |
0.03 |
0.03 |
18.0-19.0 |
4.5-5.5 |
2.5-3.5 |
0.05-0.10 |
Mechanical Properties of Duplex UNS S31803 Seamless Pipes：
|
Physical Property |
Value |
|
Density |
7.805 g/cm3 |
|
Thermal Expansion |
13.7 x10^-6/K |
|
Modulus of Elasticity |
200 GPa |
|
Thermal Conductivity |
19.0 W/m.K |
|
Electrical Resistivity |
0.85 x10-6Ω .m |
|
Mechanical Property |
Value |
|
Proof Stress |
450 Min MPa |
|
Tensile Strength |
620 Min MPa |
|
Elongation A50 mm |
25 Min % |
|
Hardness Brinell |
290 Max HB |
S31803 duplex stainless steel pipes offer the following core advantages:
High Yield Strength:
Yield strength of approximately 400–550 MPa, about twice that of 304 stainless steel
Excellent Resistance to Chloride Stress Corrosion Cracking (SCC):
Superior to 316L stainless steel in chloride environments
Pitting Resistance Equivalent Number (PREN):
32–33, positioned between 316L stainless steel and 6%Mo + N austenitic stainless steels
Good Acid Corrosion Resistance:
Optimized pickling and surface treatment processes improve surface quality and corrosion performance
Balanced Strength and Ductility:
Suitable for pressure vessels, pipelines, and structural components
Manufacturing Standards
S31803 duplex stainless steel pipes are produced in accordance with the following international standards:
ASTM A789 / ASME SA789
Seamless and welded ferritic/austenitic stainless steel pipes for general service
ASTM A790 / ASME SA790
Seamless and welded ferritic/austenitic stainless steel pipes for pressure applications
ASTM A928 / ASME SA928
Electric fusion welded duplex stainless steel pipes with filler metal
GB/T 21832-2008
Welded austenitic–ferritic duplex stainless steel pipes
GB/T 21833-2008
Seamless austenitic–ferritic duplex stainless steel pipes
S31803 pipes are widely used in industries requiring high corrosion resistance and mechanical strength, including:
Oil refining and petrochemical industries
Chemical processing and chemical transport pipelines
Oil and gas production and transmission systems
Seawater handling and desalination plants
Pulp and paper industry equipment
Fertilizer, urea, and phosphate processing plants
Energy, environmental protection, and wastewater treatment systems
Light industry, food processing, pharmaceutical equipment
High-strength structural components and pressure vessels
S31803 duplex stainless steel performs particularly well in neutral chloride environments, offering a cost-effective alternative to higher-alloy stainless steels.
Performance Advantages
Corrosion resistance superior to austenitic stainless steels
Yield strength approximately 2× that of 18-8 stainless steels
Excellent resistance to stress corrosion cracking in chloride environments
High energy absorption capacity, suitable for impact- and safety-critical applications
Comparable thermal expansion coefficient to carbon steel, facilitating welding and composite applications
Womic Stainless Steel Manufacturing Capability
Womic Stainless Steel Co., Ltd. specializes in the production of:
Stainless steel seamless pipes
Boiler and heat exchanger tubes
Duplex and super duplex stainless steel pipes
Commonly supplied materials include:
S30408, S30403, S32168, S32169, S31608, S31603, S31609, S31668, S31685, S31653, S31688, S31683, S31708, S31703, S34778, S34779, S30908, S31008, S90403, S22253, S23043, S22053, S25073, S32900, and more.
The company is equipped with eddy current testing (ECT), ultrasonic testing (UT), hydrostatic testing, and intergranular corrosion testing facilities, supported by senior-grade engineers.
Womic holds the China Special Equipment Pressure Pipeline Manufacturing License (TS2710N76-2018), ensuring reliable quality and compliance with international project requirements.
These extensive tests ensure that every Stainless Steel - of Duplex EN 10088-3 1.4462 (Grade X2CrNiMoN22-5-3) Steel Pipes from Womic Steel meets the highest international standards for reliability and longevity.
EachStainless Steel - of Duplex EN 10088-3 1.4462 (Grade X2CrNiMoN22-5-3) Steel Pipesis securely packed and clearly labeled to ensure safe and efficient transport worldwide.
General packaging: Bundle packing with woven fabric, iron strip bundle, plastic cap on two ends for local truck transport.
Hexagonal packaging: Bundle packing with woven fabric, iron strip bundle, plastic cap on two ends for local truck transport.
Packaging of welded pipe in medium and large sizes: Wrapped with woven fabric by automatic packaging for export sea-worthy transport.
Packaging for medium and large size welded pipes to be exported: Wooden or steel crate packaging for export sea-worthy transport.
General packaging for products to be exported: Wooden box for export sea-worthy transport.
Packaging of condensation pipe and low-pressure heater tube: Wooden box for local truck and export sea-worthy transport.
1. Direct cooperation with global shipowners ensures the most competitive freight rates.
2. Professional loading and securing teams guarantee damage-free shipment.
3. Efficient document preparation, minimizing customs delays.
4. Rapid delivery time — standard sizes kept in ready stock more than 10,000tons.
5. Continuous cargo tracking and after-sales follow-up to ensure smooth arrival at destination.
Womic Steel is a trusted manufacturer and exporter specializing inStainless Steel - of Duplex EN 10088-3 1.4462 (Grade X2CrNiMoN22-5-3) Steel Pipes ,committed to delivering premium quality and professional service.
