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| Categories | Duplex Stainless Steel Tube |
|---|---|
| Brand Name: | Yuhong |
| Model Number: | ASTM A789 UNS S31803 |
| Certification: | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Place of Origin: | China |
| MOQ: | 100 kgs |
| Price: | Negotiable |
| Payment Terms: | L/C, T/T |
| Delivery Time: | 20 days |
| Packaging Details: | Ply-wooden Case /Iron Case/ Bundle with plastic Cap etc. |
| Standard: | ASTM A789 |
| Grade: | UNS S31803 |
| Seamless pipe & Tube Size: | 1/2”to 8" |
| Outer Diameter: | 6.0- 630 mm |
| Schedules: | 10s, 20, 40s, 40, 60, 80s, 80, 100, 120, 140, 160, XXH |
| NDT Test: | HT/UT/ET |
| Application: | Boilers, Superheaters and Heat Exchangers |
| High light: | UNS S31803 |
| Company Info. |
| Yuhong Group Co.,Ltd |
| Verified Supplier |
| View Contact Details |
| Product List |
ASTM A789 UNS S31803 Duplex Stainless Steel Seamless Tube For Chemical Process Plant
ASME SA789 S31803 stainless steel tubing provides better pitting and crevice corrosion resistance than 316L or 317L austenitic stainless steel in almost all corrosive media. It also has high corrosion and erosion fatigue properties, as well as lower thermal expansion rates and higher thermal conductivity compared to austenitic stainless steels. The advantage of a duplex structure is that it combines the advantages of ferritic alloys, stress corrosion resistance, crack resistance, and high strength with the ease of manufacture and corrosion resistance of austenitic alloys.
Chemical Composition
| Grade | C max | Si max | Mn max | P max | S max | Cr | Ni | Mo | N |
| UNS S32750 | 0.030 | 0.8 | 1.2 | 0.030 | 0.015 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 |
| UNS S31803 | 0.030 | 1.0 | 2.0 | 0.020 | 0.020 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
| UNS S31500 | 0.030 | 1.0 | 1.2-2.0 | 0.030 | 0.030 | 18.0-19.0 | 4.5-5.5 | 2.5-3.5 | 0.05-0.10 |
Physical Properties
| Grade | Y.S.MPa min | T.S.Mpa min | Elongation % | Hardness HRC |
| UNS S32750 | 550 | 800 | 15 | 20 |
| UNS S31803 | 450 | 620 | 25 | 20 |
| UNS S31500 | 440 | 630 | 30 | 20 |
Heat Treatment Requirements
| UNS Designation | Temperature | Quench |
| S31803 | 1870-2010 °F [1020-1100°C] | Rapid cooling in air or water |
| S32205 | 1870-2010 °F [1020-1100°C] | Rapid cooling in air or water |
| S31500 | 1800-1900 °F [980-1040°C] | Rapid cooling in air or water |
| S32550 | 1900 °F [1040°C] min. | Rapid cooling in air or water |
| S31200 | 1920-2010 °F [1050-1100°C] | Rapid cooling in water |
| S31260 | 1870-2010 °F [1020-1100°C] | Rapid cooling in water |
| S32001 | 1800-1950 °F [982-1066°C] | Rapid cooling in air or water |
| S32304 | 1700-1920 °F [925-1050°C] | Rapid cooling in air or water |
| S32750 | 1880-2060 °F [1025-1125°C] | Rapid cooling in air or water |
| S32760 | 2010-2085 °F [1100-1140°C] | Rapid cooling in air or water |
| S32950 | 1820-1880 °F [990-1025°C] | Rapid cooling in water |
| S32520 | 1975-2050 °F [1080-1120°C] | Rapid cooling in air or water |
Duplex Stainless Steel Pipe Application
S31803 Tubes Ordering Information
Orders for product under this specification should in- clude the following, as required, to describe the desired material adequately:
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ASTM A789 UNS S32250 Duplex Stainless Steel Seamless Tube For Water Treatment
ASME SA789/ ASTM A789 S31803 Duplex Stainless Steel Tube for Boiler Tube Ply Wooden Case
Duplex 2205 Seamless Tube , ASTM A789 UNS S31803 Duplex Steel Tube
ASTM A789 UNS S31803 SAF2205 Duplex Steel Seamless Tube In Aggressive Environments
ASTM A789 S32205 Duplex Steel Tube For Oil And Gas Industry
ASME SA789 / ASTM A789 S32750 Duplex Steel Seamless Tube for Heat Exchanger , Chemical Application
Good Hardness ASTM A789 S32205 Duplex 2205 1.4462 Seamless Tube
ASTM A789 UNS S32205 Duplex Steel Seamless Tube For Chemical Industry
ASTM A789 UMS S32205 Duplex Steel Seamless tube Resistant To Seawater Corrosion
ASTM A789 UNS S32750 Super Duplex Steel Tube , For Surviving Seawater Application
