ASTM A789 Duplex Steel S31803/S32205 Pipes & Tubes
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The majority of air conditions do not cause these to corrode very easily. These circumstances include the presence of acidic materials, saltwater, or freshwater. It demonstrates exceptional corrosion resistance qualities even in the presence of acidic materials, as well as great strength even at extremely high temperatures. As a result, this grade of steel compression tube fittings is used in numerous industrial processes. This SS grade provides a firm grip and is incredibly hard. These pipes are strong and well-built. The strongest tubes are made of stainless steel in these grades. They last for a very long time without leaking or breaking. Because of its great power and instrumentation uses, it is a formidable product.
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They are produced in accordance with the requirements. It’s appropriate for a variety of applications across numerous sectors thanks to these standard criteria. These include the chemical and hydraulic industries. It has a gas leak and leak-proof seal built right into it. Easy to install. The food and chemical processing industries frequently use these pipes and tubes. They are also utilised in offshore drilling and oil processing operations. This is a fantastic product that makes sense financially, which explains its popularity.
What is UNS S31803/2205?
UNS S31803/2205 is a duplex stainless steel that blends the best of both worlds with its ferritic-austenitic microstructure. Made up of about 40-50% ferrite in its annealed state, it combines the high strength of ferritic steels with the corrosion resistance typical of austenitic grades. This makes it an excellent choice for tackling issues like chloride-induced stress cracking, which is often a weakness in stainless steels.
UNS S32205 and UNS S31803 refer to specific duplex stainless steel grades covered under this standard:
UNS S31803: This is the original duplex stainless steel grade with a roughly equal mix of austenitic and ferritic microstructures. It offers high strength, good corrosion resistance, and resistance to chloride-induced stress corrosion cracking.
UNS S32205: An improved version of S31803, S32205 has higher nitrogen content, providing enhanced mechanical properties and better corrosion resistance, particularly against pitting and crevice corrosion in chloride-containing environments.
ASTM A789 DUPLEX STEEL S31803/S32205 EQUIVALENT GRADES
| STANDARD | UNS | WNR. |
| Duplex Steel 2205 | S31803 / S32205 | 1.4462 |
SPECIFICATION OF ASTM A789 DUPLEX STEEL S31803/S32205 PIPES & TUBES
Specifications : ASTM A790 / ASME SA790, ASTM A789 / ASME SA A789
Grade : UNS S31803, S32205
Size : ½”NB – 24”NB
Thickness Range : 0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
Outer Diameter: 6.0-630mm
Type : Seamless / ERW / Welded / Fabricated Pipes
Form : Round, Square, Rectangular, Oval, Hydraulic Etc
Length : Single Random, Double Random & Required Length
End : Plain End, Beveled End, Treaded
End Protection : Plastic Caps
Delivery Condition : Annealed and Pickled, Polished, Bright Annealed, Cold Drawn
Inspection, Test Reports : Mill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, PMI Test Reports, Visual Inspection Reports, Third Party Inspection Reports, NABL Approved Lab Reports, Destructive Test Report, Non Destructive Test Reports
Packing : Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests
Specials : Sizes and Specifications other than above can be manufactured on request
CHEMICAL COMPOSITION OF DUPLEX STEEL S31803/S32205 PIPES &TUBES
| Grade | Common Name | C% | Mn% | Si% | P% | S% | Cr% | Ni% | Mo% | N% |
| 2205 | S31803 | 0.030 | 2.00 | 1.00 | 0.030 | 0.020 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
| S32205 | 0.030 | 2.00 | 1.00 | 0.030 | 0.020 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 0.14-0.20 |
MECHANICAL PROPERTIES OF DUPLEX STEEL S31803/S32205 PIPES AND TUBES
| Tensile Strength, ksi | 90 min |
| 0.2% Yield Strength, ksi | 65 min |
| Elongation, % | 25 min |
| Hardness [HRC] | 293 max |
PHYSICAL PROPERTIES OF DUPLEX STEEL S31803/S32205 PIPES AND TUBES
| Density lbm/in3 | Electrical Resistivity mW•in | Thermal Conductivity (BTU/hr•ft•°F) | Heat Capacity BTU/lbm•°F | Electrical Resistivity (in x 10-6) | |
| at 68°F | 0.278 | 27.6 | 8.7 | 0.112 | 33.5 |
| at 212°F | 26.1 | 9.2 | 0.119 | 35.4 | |
| at 392°F | 25.4 | 9.8 | 0.127 | 37.4 | |
| at 572°F | 24.9 | 10.4 | 0.134 | 39.4 |
Application of Duplex Steel S31803/2205
- Applications:
- Seawater systems
- Seawater pumps and valves
- Chemical process vessels, piping, and heat exchangers
- FGD scrubber systems
- Pulp mill digesters, bleach washers
- Food process equipment
- Oil field piping
Latest Price of ASTM A789 UNS S32205/S31803 Duplex Stainless Steel Pipes & Tubes
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