UNS S31803 is a ferritic-austenitic stainless steel. S31803 and 2205 Pipe Tube are seamless and weldable.
Duplex S31803/2205 Pipe and Tube stanard:
ASME SA789 /ASTM A789: Standard for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service.
ASME SA790 /ASTM A790: Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe.
HT PIPE supplys the ASME SA789 S31803/2205 Seamless and Welded Tubes and ASME SA790 S31803/2205 Seamless and Welded
Duplex Stainless Steel Pipe for the Oil and Gas, Refinery, Petrochemical and Power Industries.
S31803/2205 Pipe size:
Seamless Pipe size: 4 to 219mm; W. T.: 0.5 to 20mm
Seamless Tube Size: 3.35 mm To 101.6 mm (OD)
Welded Pipe size: 5.0 mm – 1219.2 mm
S31803/2205 Pipe Schedule:
SCH5, SCH10, SCH10S, SCH20, SCH30, SCH40, SCH40S, STD, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXSS31803 Pipe Form:Round, Square, Hollow, Rectangular, Hydraulic, Straight Pipes, U bent Tube, Hollow, LSAW Tube Etc.
 A789 S31803 Tube |
 A790 UNS S31803 Pipe |
 Seamless Duplex SS Tube |
 Duplex Welded Pipe |
 S32205 Pipe |
 Duplex Welded Tube |
S31803 and 2205 Duplex Pipe Chemical Composition:
| Grade |
C≤ |
Mn≤ |
P≤ |
S≤ |
Si≤ |
Ni |
Cr |
Mo |
N |
| S31803 |
0.03 |
2.00 |
0.03 |
0.02 |
1.00 |
4.5–6.5 |
21.0–23.0 |
2.5–3.5 |
0.08–0.20 |
| S32205 |
0.03 |
2.00 |
0.03 |
0.02 |
1.00 |
4.5–6.5 |
22.0–23.0 |
3.0–3.5 |
0.14–0.20 |
Duplex Steel S31803 and 2205 Pipe Mechanical Properties:
| Mechanical properties |
Tensile, min, ksi[MPa] |
Yield, min, ksi[MPa] |
Elongation, %(min) |
Hardness, HB（max） |
| S31803 |
90 [620] |
65 [450] |
25 |
290 |
| S32205 |
95 [655] |
65 [450] |
25 |
290 |
Equivalent Grades for S31803 Duplex Stainless Steel Pipe:
| STANDARD |
UNS |
WERKSTOFF NR. |
| Duplex S31803/2205 |
S31803 |
1.4462 |
Dimensional Tolerance:
Nominal pipe size
up to 4 = ± 0.79 mm | 5 thru 8 = + 1.58 mm / - 0.79 mm
10 thru 18 = + 2.37 mm / - 0.79 mm | 20 thru 24 = + 3.18 mm / - 0.79 mm |
Wall Thickness
All Diameters = - 12.5%
+ tolerance not specified |
Length
+ 6.40 mm / - 0 mm |
Weight
Weight = + 10% / - 1.5% |
Test:
Hardness Test
Flattening Test
Pitting Resistance Test
Chemical Analysis – Spectro Analysis
Micro and MacroTest
Flaring TestIntergranular Corrosion (IGC) Test
Mechanical Testing Such as Tensile of Area
Positive Material Identification (PMI Testing)
Applicaiton:
Oil Tube, Gas Tube, Fluid Tube, Boiler and Heat exchanger
