Yuhong Group Co.,Ltd
Yuhong Holding Group Co.,LTD
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ASTM A790 S31803 Seamless Duplex Steel Thick Wall Thickness Pipes
YUHONG Group, a factory that offers ASME SA790 / ASTM A790 S31803 SMLS duplex stainless steel thick wall thickness pipes in more than 70 countries up to now.The products we provide are all of high quality, and our quality inspectors will conduct quality inspections on the goods after production is completed.In so many years of exporting, quality problems have rarely occurred.
Specifications
| Standard | ASME SA790 / ASTM A790 |
| Name of Material | Duplex Stainless Steel Pipes----Seamless |
| Keywordas | Ferritic and Austentic stainless steel;; duplex steel pipes etc.thick wall thickness |
| Condition | Annealed |
| Quantity | Feet,metres,or number of lengths |
| Length | Specific or random |
ASTM A790/ ASME SA790 This specification covers seamless and straight-seam welded ferritic/austenitic steel pipe intended for general corrosive service, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.
Advantages
1. Offers excellent resistance to corrosion, especially in harsh environments such as high chloride and acidic conditions.
2. Have a higher strength compared to austenitic stainless steel pipes, making them suitable for applications that require high mechanical strength.
3. More affordable compared to other high-performance alloys while still providing excellent corrosion resistance and strength.
4. Be easily welded using commonly used techniques and do not require preheating or post-weld treatment.
5. Can withstand thermal cycles without deformations. This property is especially beneficial in applications where temperature fluctuations are common.
Heat Treatment
| UNS | Heat Treating Temperature | Quench |
| S31803 | 1870-2010°F [1020-1100°C] | Rapid cooling in air or water |
Hardness Requirements
| HBW | HRC |
| 290 max | 30max |
Chemical Composition %
| C | Mn | P | S | Si | Ni | Cr | Mo | N |
| 0.03 | 2 | 0.03 | 0.02 | 1 | 4.5-6.5 | 21-23 | 2.5-3.5 | 0.08-0.2 |
Tensile Requirements
| Grade | Yield Strength (Mpa) | Tensile Strength (Mpa) | Elongation (%) |
| S31803 | 450 | 620 | 25 min |
Applications Industries
Chemical Processing
Mechanical Parts
Condensers & Boiler & Heat Exchangers
Sea Water Equipment
Food Processing- Salt Making,etc.
Energy Field- Nuclear Power Generation,Tidal Power Generation,etc
Environmental Protection Field- Gas Processing,Waste Water Treatment,etc.