ASTM A790 UNS S31803 Duplex Stainless Steel Pipe
- ASTM A790,ASME SA790
- China
- Stock
- UNSS 31803
ASTM A790 UNS S31803 Steel Pipe covers seamless and straight-seam welded ferritic/austenitic steel pipe intended for general corrosive service, with particular emphasis on resistance to stress corrosion cracking.
ASTM A790 UNS S31803 Duplex Stainless Steel Pipe
ASTM A790 UNS S31803 Duplex Stainless Steel Pipe
Standard Specification for
Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
ASTM A790 UNS S31803 Steel Pipe covers seamless and straight-seam welded ferritic/austenitic steel pipe intended for general corrosive service, with particular emphasis on resistance to stress corrosion cracking.
ASTM A790 UNS S31803 Duplex Stainless Steel Pipe Quick Details
Company Name: Beite steel pipe
Country/Region: China
Product Name：ASTM A790 UNS S31803 Duplex Stainless Steel Pipe
Manufacture：seamless or an automatic welding
Outside Diameter：12.7mm——219mm
Wall thickness：0.9mm——20mm
Length：6000mm、12000m or specified length as require
Port of Shipment：Tianjin,China
Payment：L/C or T/T
Delivery: 7-15 days after payment
Package: Bundles (hexagonal),Wooden Boxes,Crates (steel/wooden)
Materials and Manufacture
Manufacture:
The pipes are made by the seamless or an automatic welding process, with no addition of filler metal in the welding operation.
pipe may be either hot-finished or cold-finished.
The pipes are pickled free of scale. When bright annealing is used, pickling is not necessary.
Heat-Treated
all pipe are furnished in the heat-treated condition as shown in Table 1.
TABLE 1 Heat Treatment
|
UNS Designation |
Temperature °F [°C] | Quench |
| S31803 |
1870–2010 [1020–1100] |
Rapid cooling in air or water |
Chemical Composition
|
UNS Designation |
C | Mn | P | S | Si | Ni | Cr | Mo | N |
| S31803 | 0.030 | 2.00 | 0.030 | 0.020 | 1.00 | 4.5–6.5 | 21.0–23.0 | 2.5–3.5 | 0.08–0.20 |
Mechanical Properties
|
UNS Designation |
Type A |
Tensile Strength, min, ksi[MPa] |
Yield Strength, min,ksi [MPa] |
Elongation in 2 in. or 50 mm,min, % |
Hardness, max | |
| HBW | HRC | |||||
| S31803 | 90 [620] | 65 [450] | 25 | 290 | 30 | |
Workmanship, Finish, and Appearance
The finished pipes shall be reasonably straight and shall have a workmanlike finish.
Mechanical Tests Required
Transverse or Longitudinal Tension Test
Mechanical Testing Lot Definition
Flattening Tes
Hardness Test
Hydrostatic or Nondestructive Electric Test
Product Marking
the marking include the manufacturer’s private identifying mark and whether the pipe is seamless or welded. If specified in the purchase order, the marking for pipe larger than NPS 4 shall include the weight.
Ordering Information
1.1 Quantity (feet, [metres], or number of lengths),
1.2 Name of material (ferritic/austenitic steel pipe),
1.3 Process (seamless or welded),
1.4 Grade (UNS S31803),
1.5 Size (NPS designator or outside diameter and schedule number of average wall thickness),
1.6 Length (specific or random) ,
1.7 End finish (section on ends of Specification A999/A999M),
1.8 Test report required (section on certification of Specification A999/A999M),
1.9 Specification designation, and
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