A789 UNS S31803 stainless steel pipe is a duplex stainless steel with austenite-ferrite structure, especially excellent performance in chloride and other corrosive media. Able to withstand higher pressure and temperature. Also has excellent resistance to stress corrosion cracking.
A789 UNS S31803 stainless steel duplex pipe is widely used in heat exchangers, condensers, evaporators and other equipment in chemical, petroleum, electric power, pharmaceutical and other industries.
Products Data
SA 789 UNS S31803 pipe Chemical Composition
| UNS Designation |
Composition, % | ||||||||||
| C Max |
Mn max |
P max |
S max |
Si max |
Ni | Cr | Mo | N | Cu | Others | |
| S31803 | 0.03 | 2 | 0.03 | 0.02 | 1 | 4.5-6.5 | 21.0-23.0 | 2.5-3.5 | 0.08-0.20 | . . . | . . . |
SA789 material pipe Heat Treatment Requirements
| UNS Designation |
Temperature | Quench |
| S31803 | 1870-2010 °F [1020-1100°C] | Rapid cooling in air or water |
UNS S31803 Duplex Tube Tensile Requirements
| Grade | Tensile strength, min, ksi [MPa] | Yield strength, min ksi [MPa] | Elongation in 2 in., or 50mm, min,% | Hardness, Max Brinell |
| S31803 | 90 [620] | 65 [450] | 25 | 290 |
Products display
Duplex Steel UNS S31803 Heat Exchanger Tubes
Why Choose GNEE
GNEE has been specialized in producing steel pipes for more than 16 years and has rich experience. The factory has professional technicians and engineers, professional testing equipment, and rich delivery experience.
The products are exported to more than 60 countries and regions including Russia, Canada, India, Brazil, and Southeast Asia.
If you would like to know more about our company or our products, please feel free to contact us. sales@gneetube.com
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FAQ
Q:Do you offer a service for customized products?
Yes, we can produce according to your specifications and drawings.
Q:Can you assist me in importing steel products for the first time?
Yes, we have shipping agent who will arrange the shipment with you.
Q. What is your delivery time?
Within 7 working days after receiving your balance payment.
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