Heavy Wall Seamless Stainless Steel Pipe , Duplex SS Seamless Pipe
ASTM A789 S31803
TIPTOP ensures highest quality duplex steel UNS S31803 seamless
pipe for use in extreme environments. We are focused on meeting
both your materials and supplier relation needs. Our duplex steel
UNS S31803 pipe tubing have a smooth finish and strong mechanical
traits, as well as closer tolerances.
1. Standards:
ASTM A789 Standard Specification for Seamless and Welded
Ferritic/Austenitic Stainless Steel Tubing for General Service
2. Application:
Chemical processing, transport and storage,
Oil and Gas exploration and processing equipment,
Marine and other high chloride environments,
Pulp and paper digesters, liquor tanks and paper machines.
3. Ordering Information
Quantity (feet, meters, or number of lengths),
Name of product (seamless or welded tubes)
Grade (S31803)
Size (outside diameter and average wall thickness, unless minimum
wall thickness is specified),
Length (specific or random)
Optional requirements (for product analysis; for hydrostatic or
nondestructive electric test),
Test report required
Special requirements
4. Chemical Requirements
| Chemical Composition |
| UNS Designation | C | Mn | P | S | Si | 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 | … | … |
5. Tensile and Hardness Requirements
| Tensile and Hardness Requirements |
| UNS Designation | Tensile Strength, min, ksi (Mpa) | Yield Strength, min, ksi (Mpa) | Elongation in 2 in. or 50mm, min, % | Hardness, max. |
| HBW | HRC |
| S31803 | 90 (620) | 65 (450) | 25 | 290 | 30 |
6. Available Size Range
OD | Thickness |
mm | inch | mm | SCH |
10.3~914 | 1/8’’~36’’ | 0.5~70 | All |
*If the steel grades and size you are looking for are not listed
above, please contact us for further information. |
