ASTM A790 UNS S31803 pipe

ASTM A790 UNS S31803 pipe manufacturer in India
ISO Certified Manufacturer

Spark Steel supplies premium-grade ASTM A790 UNS S31803 Pipe for demanding industrial applications requiring exceptional strength and corrosion resistance. Available in both seamless and welded configurations, these duplex stainless steel pipes offer a robust chemical composition combining chromium, nickel, and molybdenum. This balanced alloy structure delivers superior resistance to stress corrosion cracking, pitting, and crevice corrosion, making it an ideal choice for challenging operating environments.

20+
Years of Experience
50+
Grades in Stock
1/8"–2–4"
Size Range
100%
Quality Tested

ASTM A790 UNS S31803 pipe specification

ASTM A790 UNS S31803 pipe specification

SPECIFICATIONDETAILS
EndPlain, Straight cut and Beveled
Wall Thicknessseamless : 0.3 - 50 mm, welded : 0.5 - 20mm
Outside Diameterseamless : 6 - 630mm, welded : 6.0 - 630mm
Temperature Rangeabove 572°F (300°C)
ScheduleSCH 5 to SCH XXS
Surface coatingBlack painting, 3PE, PP, FBE
ASTM A790 UNS S31803 pipe
ASTM A790 UNS S31803 duplex seamless pipe
A790 S31803 ERW pipe
ASTM A 790 UNS S31803 round pipe
ASME SA790 S31803 welded pipe
A790 S31803 square pipes

A790 S31803 erw pipe price

A790 S31803 erw pipe price

Description Price in USD Price in Kilogram (INR)
Seamless ASTM A790 UNS S31803, Thickness: 4MM, Size: 2 inch $ 5.85 ₹ 500
UNS S31803 Duplex Pipes, 3 inches $ 7.02 ₹ 600

ASME SA790 S31803 pipe testing

  • Hardness Test
  • Pitting Resistance Test
  • Positive Material Identification – PMI Testing
  • Intergranular Corrosion (IGC) Test
  • Flattening Test
  • Macro and Micro Test

Size chart of ASTM A 790 UNS S31803 round pipe

Size chart of ASTM A 790 UNS S31803 round pipe

OD
mm 		WT
mm 		Sch in. Kg/m
42.16 4.85 80S 1¼ 4.53
42.16 6.352) 160 1¼ 5.69
48.26 2.77 10S 1½ 3.16
48.26 3.68 40S 1½ 4.11
48.26 5.08 80S 1½ 5.49
60.33 2.77 10S 2 3.99
60.33 3.91 40S 2 5.52
60.33 5.54 80S 2 7.60
60.33 8.742) 160 2 11.29
73.03 3.05 10S 2½ 5.35
73.03 5.16 40S 2½ 8.77
73.03 7.01 80S 2½ 11.59
88.90 5.49 40S 3 11.47
88.90 7.62 80S 3 15.51
88.90 11.132) 160 3 21.67
88.90 3.05 10S 3 6.56
101.60 5.74 40S 3½ 13.78
101.60 3.05 10S 3½ 7.53
101.60 8.08 80S 3½ 18.92
114.30 3.05 10S 4 8.50
114.30 6.02 40S 4 16.32
13.72 2.24 40S 1/4 0.64
13.72 3.02 80S 1/4 0.81
13.72 1.65 10S 1/4 0.50
17.15 1.65 10S 3/8 0.64
17.15 2.31 40S 3/8 0.86
17.15 3.20 80S 3/8 1.12
21.34 2.11 10S 1/2 1.02
21.34 2.77 40S 1/2 1.29
21.34 3.73 80S 1/2 1.65
26.67 2.11 10S 3/4 1.30
26.67 2.87 40S 3/4 1.71
26.67 3.91 80S 3/4 2.23
33.40 2.77 10S 1 2.13
33.40 3.38 40S 1 2.54
33.40 4.55 80S 1 3.29
33.40 6.352) 160 1 4.30
42.16 2.77 10S 1¼ 2.73
42.16 3.56 40S 1¼ 3.44
114.30 8.56 80S 4 22.67
114.30 13.492) 160 4 34.05
141.30 6.55 40S 5 22.10
141.30 9.53 80S 5 31.44
141.30 15.882) 160 5 49.87
168.28 3.4 10S 6 14.04
168.28 7.11 40S 6 28.69
168.28 10.97 80S 6 43.21
168.28 14.27 120 6 54.75
168.28 18.262) 160 6 68.59
219.08 8.18 40S 8 43.20
219.08 12.7 80S 8 65.63
219.08 18.23 120 8 91.30
219.08 23.012) 160 8 112.97

Pressure rating of ASTM A790 UNS S31803 pipe

Pressure rating of ASTM A790 UNS S31803 pipe

Pipe O.D.
(In.) 		Wall Thickness Of Pipe (Inches)
.028 .035 .049 .065 .083 .095 .109 .120
Working Pressure (Psig)
3/8 3100 4400 6100
1/2 2300 3200 4400
1/8 7900 10100
1/4 3700 4800 7000 9500
5/16 3700 5400 7300
3/4 2200 3000 4000 4600
1 2200 2900 3400 3900 4300

A790 UNS S31803 efw pipes heat treatment

A790 UNS S31803 efw pipes heat treatment

Process Value
Quenching Rapid Cooling in Water or Air
Annealing Temperature °F [°C] 1870 - 2010 [1020 - 1100]

Chemical composition of UNS S31803 pipe

Chemical composition of UNS S31803 pipe

Grade Mn C Si P N Cr S Mo Ni
(UNS S31803) Min Max - 2.00 - 0.030 - 1.00 - 0.030 0.08 - 0.20 21.0 - 23.0 - 0.020 2.5 - 3.5 4.5 - 6.5

ASTM A790 S31803 square pipes mechanical properties

ASTM A790 S31803 square pipes mechanical properties

Grade Tensile Strength
(MPa) min 		Elongation
(% in 50mm) min 		Yield Strength
0.2% Proof
(MPa) min 		Hardness
Rockwell C (HR C) Brinell (HB)
UNS S31803 621 25 448 31 max 293 max

ASME SA 790 Gr UNS S31803 hollow pipes equivalent Grades

ASME SA 790 Gr UNS S31803 hollow pipes equivalent Grades

Grade UNS
No 		Euronorm Old British Japanese JIS Swedish SS
No Name BS En
2205 S31803 / S32205 1.4462 X2CrNiMoN22-5-3 318S13 - SUS 329J3L 2377

Physical properties of ASTM A790 UNS S31803 high pressure pipe

Physical properties of ASTM A790 UNS S31803 high pressure pipe

Grade Elastic
Modulus(GPa) 		Density
(kg/m3) 		Mean Co-eff of Thermal
Expansion (μm/m/°C) 		Specific
Heat
0-100°C( J/kg.K) 		Thermal
Conductivity (W/m.K) 		Electrical
Resistivity
(nΩ.m)
0-100°C 0-315°C 0-538°C at 100°C at 500°C
UNS S31803 190 782 13.7 14.2 - 418 19 - 850

ASTM A790 UNS S31803 pipe weight chart

ASTM A790 UNS S31803 pipe weight chart

NPS Outside Diameter Wall Thickness Weight Weight
in mm in mm Sched kg/Mtr Lb/ft
3″ 3.500 89 0.216 5.486 40 STD 11.284 7.576
0.300 7.620 80 STD 15.272 10.253
4″ 4.500 114 0.237 6.020 16.073 10.790
0.337 8.560 22.318 14.983
6″ 6.625 168 0.188 4.775 19.252 12.924
0.203 5.516 20.739 13.923
0.219 5.563 22.318 14.983
0.250 6.350 25.354 17.021
0.280 7.112 40 STD 58.263 18.974
0.312 7.925 31.334 21.036
0.375 9.525 37.285 25.031
0.432 10.973 80 XHY 42.561 28.573
0.500 12.700 48.719 32.708
8″ 8.625 219 0.188 4.775 25.233 16.940
0.203 5.156 27.198 18.259
0.219 5.563 29.286 19.661
0.250 6.350 20 33.308 22.361
0.277 7.036 30 36.786 24.696
0.322 8.179 40 42.352 28.554
0.375 9.525 49.216 33.041
0.406 10.312 60 53.085 35.638
0.500 12.700 80 XHY 64.627 43.388
10″ 10.750 273 0.188 4.775 31.588 21.207
0.219 5.563 36.689 24.631
0.250 6.350 20 41.759 28.035
0.307 7.798 30 51.002 34.240
0.344 8.738 56.946 38.231
0.365 9.271 40 STD 63.301 40.483
0.438 11.125 71.852 48.238
0.500 12.700 60 XHY 81.530 54.735
0.594 15.088 80 95.969 64.429
1/2″ 0.840 21 0.109 2.769 40 STD 1.268 0.851
0.147 3.734 80 STD 1.621 1.088
3/4″ 1.050 27 0.113 2.870 40 STD 1.684 1.131
0.154 3.912 80 STD 2.195 1.474
1″ 1.315 33 0.133 3.378 40 STD 2.501 1.679
0.179 4.547 80 STD 3.325 2.172
1 1/4″ 1.660 42 0.140 3.556 40 STD 3.385 2.273
0.191 4.851 80 STD 4.464 2.997
1 1/2″ 1.900 48 0.145 3.683 40 STD 4.048 2.718
0.200 5.080 80 STD 5.409 3.361
2″ 2.375 60 0.154 3.912 40 STD 5.441 3.653
0.218 5.537 80 STD 7.480 5.022
2 1/2″ 2.875 73 0.203 5.516 40 STD 8.629 5.793
0.276 7.010 80 STD 11.411 7.661
12″ 12.750 324 0.188 4.775 37.570 25.222
0.219 5.563 43.657 29.309
0.250 6.350 49.713 33.375
0.281 7.137 55.739 37.420
0.312 7.925 61.735 41.445
0.375 9.525 73.824 49.562
0.406 10.312 79.727 53.525
0.500 12.700 97.438 65.415
0.562 14.275 108.966 73.154
16” 16.000 406 0.188 4.775 47.290 21.748
0.219 5.563 54.980 36.910
0.250 6.350 10 62.639 42.053
0.281 7.137 70.268 47.174
0.312 7.925 20 77.866 52.275
0.344 8.738 85.677 57.519
0.375 9.525 30 STD 93.213 62.578
0.438 11.125 108.433 72.797
0.500 12.700 40 XHY 123.289 82.770
18″ 18.000 457 0.219 5.563 61.948 41.588
0.250 6.350 70.593 47.393
0.281 7.137 79.208 53.176
0.312 7.925 20 87.792 58.939
0.375 9.525 STD 105.144 70.588
0.438 11.125 30 122.369 82.152
0.500 12.700 XHY 139.198 93.450
0.562 14.275 40 155.904 104.666
0.625 15.875 172.754 115.978
14″ 14.000 356 0.188 4.775 41.308 27.732
0.219 5.563 48.012 32.233
0.250 6.350 20 54.685 36.713
0.281 7.137 61.327 41.172
0.312 7.925 67.939 45.611
0.375 9.525 STD 81.281 54.568
0.438 11.125 40 94.498 63.441
0.500 12.700 XHY 107.381 72.090
0.625 15.875 132.983 89.278
20″ 20.000 508 0.250 6.350 78.547 52.733
0.282 7.163 88.458 59.386
0.312 7.925 97.719 65.604
0.375 9.525 20 STD 117.075 78.598
0.438 11.125 136.305 91.508
0.500 12.700 30 XHY 155.106 104.130
0.594 15.088 40 183.378 123.110
0.625 15.875 192.640 129.328
0.688 17.475 211.368 141.901
24″ 24.000 610 0.250 6.350 94.456 63.413
0.281 7.137 106.029 71.183
0.312 7.925 117.573 18.932
0.375 9.525 20 STD 140.938 64.618
0.438 11.125 164.176 110.219
0.500 12.700 XHY 186.923 125.490
0.625 15.875 232.410 156.028
0.688 17.475 40 255.148 171.293
0.750 19.050 277.401 186.233
30″ 30.000 762 0.250 6.350 118.318 79.433
0.281 7.137 132.851 89.189
0.312 7.925 10 147.353 98.925
0.375 9.525 STD 176.731 118.648
0.438 11.125 205.983 138.286
0.500 12.700 20 XHY 234.647 157.530
0.625 15.875 30 292.066 196.078
0.688 17.475 320.817 215.380
0.750 19.050 348.988 234.293
42″ 42.000 1067 0.312 7.925 206.914 138.911
0.375 9.525 STD 248.319 166.708
0.500 12.700 XHY 33.097 221.610
0.750 19.050 492.163 330.413
36″ 36.000 914 0.250 6.350 142.180 95.453
0.281 7.137 159.672 107.196
0.312 7.925 10 177.133 118.918
0.375 9.525 STD 215.525 142.678
0.438 11.125 247.790 166.353
0.500 12.700 20 XHY 282.372 198.570
0.625 15.875 351.723 236.128
0.688 17.475 386.487 259.467
0.750 19.050 420.576 282.353
48″ 48.000 1219 0.375 9.525 STD 284.112 190.738
0.438 11.125 331.404 222.487
0.500 12.700 XHY 377.822 253.650
0.750 19.050 563.750 378.473
0.875 22.225 655.969 440.383

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