S31803 Duplex Stainless Steel Pipe
1. Standard: ASTM A789, ASME SA789, ASTM A790, ASME SA790
2. Size: 1/2''~48''
3. Thickness: SCH5~SCHXXS
4. Service: Cutting, Welding, Fabricated, Customized
S31803 duplex stainless steel pipe is a kind of pipe composed of two different austenite and ferrite crystal structures. Duplex structure makes S31803 pipe perform well in high temperature, high pressure and corrosive environment. Austenitic stainless pipe may suffer from stress corrosion cracking in high temperature chloride-containing environment. ASTM A790 2205 pipe has high resistance to chloride and stress corrosion, which is better than 304L and 316L austenitic stainless steel. Our company is a 2205 supplier with 15+ export experience. Contact us for more information and quotation for free!
S31803 Duplex Steel Pipe Standard:
- ASTM A790 : Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
- ASTM A789 : Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service
- ASME B36.19：Specication for stainless steel pipes
ASTM A790 UNS S31803 Pipe Specifications
| Specifications |
ASTM A 789 / ASME SA 789 ASTM A 790 / ASME SA 790 |
| Types | Seamless / Welded / EFW / Fabricated |
| Pipe Range | 1 / 2" NB - 8" NB |
| Outer Diameter | 6.0 - 630mm |
| Wall Thickness | 0.3mm – 50 mm |
| Schedules | SCH5, SCH20, SCH30, SCH40, STD, SCH60, SCH80, XS, SCH120, SCH140, SCH160, XXS |
| Length | Single Random, Double Random & Required Length |
| Form | Round Pipes, Square Pipes, Rectangular Pipe, "U" Shape, Hydraulic Pipes |
| End | Plain End, Beveled End, Treaded |
S31803 Stainless Steel Pipe Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS | EN |
| Duplex S31803 | 1.4462 | S31803 | X2CrNiMoN22-5-3 |
Chemical Composition of Duplex Stainless Steel S31803:
- Chromium (Cr): 21.0 – 23.0%
- Nickel (Ni): 4.5 – 6.5%
- Molybdenum (Mo): 2.5 – 3.5%
- Nitrogen (N): 0.08 – 0.20%
- Carbon (C): ≤ 0.03%
- Manganese (Mn): ≤ 2.00%
- Silicon (Si): ≤ 1.00%
- Phosphorus (P): ≤ 0.030%
- Sulfur (S): ≤ 0.020%
- Iron (Fe): Balance
ASME SA790 UNS S31803 Pipe Mechanical Properties
| Mechanical properties | S31803 |
| Tensile, min, ksi[MPa] | 90 [620] |
| Yield, min, ksi[MPa] | 65 [450] |
| Elongation, %(min) | 25 |
| Hardness, HB(max) | 290 |
Duplex S31803 Pipe Physical Properties
| Density (g/cm 3) | 7.805 | |
| Elastic Modulus (GPa) | 190 | |
| Mean Coefficient of Thermal Expansion (m/m/°C) | 0-100°C | 13.7 |
| 0-315°C | 14.2 | |
| 0-538°C | – | |
| Thermal Conductivity (W/m.K) | at 100°C | 19 |
| at 500°C | – | |
| Specific Heat 0-100°C (J/kg.K) | 418 | |
| Electrical Resistivity (n.m) | 850 | |
S31803 Duplex Stainless Steel Pipe Application:
- High-pressure storage tanks, high-pressure pipelines
- Heat exchangers
- Oil and gas pipelines
- Sewage treatment systems
- Pulp and paper industry
- Rotating shafts, rollers, blades, impellers
ASTM A790 UNS S31803 Pipe Quality Assurance
HT PIPE is a professional S31803 pipe suppliers, the company has passed ISO9001: 2000 quality management system certification and API quality certification system certification. High-quality products and first-class service are well received by foreign customers.
FAQ
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