Global Steel’s UNS S31803 Duplex steel valves are traded and supplied to a large customer base around the world. We provide a wide choice of made-to-order products to consumers all around the world. Duplex steels have higher ductility and toughness than other steel types.
Table of Content
UNS S31803 is ferritic-austenitic microstructure duplex steel. The alloy contains approximately 40–50 ferrite in its annealed state. The duplex microstructure combines the strength of ferritic steels with the corrosion resistance of austenitic steels. The metal is frequently employed as a viable remedy for chloride-induced stress cracking. The alloy has excellent resistance to corrosion in saltwater and most sulfuric acid concentrations. Furthermore, it is sulfide stress corrosion cracking resistant (sour-gas environments). Duplex stainless steel grades are up to twice as robust as austenitic and ferritic stainless steel grades in terms of strength. Duplex stainless steel valves are more formable under pressure and have a longer lifespan than ferrite types.
Global Steel assures you that these products are made to the highest possible quality standards. Only the best raw materials are used to make these valves. Duplex stainless steel valves are one type of industrial valve in high demand. Because of the grade’s ability to be solution treated but not thermally toughened, it can be used in a variety of applications. Duplex Steel UNS S31803 valves can be used in harsh circumstances. Many sectors, such as the chemical industry, oil and gas industry, petrochemical industry, power generation industry, sugar industry, food processing industry, paper and pulp industry, and offshore and onshore services use it. Global Steel delivers all types of products with complete safety and correct packing.
Standards | API 598 / BS EN 12266-1, ASME B 16.10, Sizes available on request API 600/BS1414, 1/8 to 1”, ASME B 16.34, ASME B 16.5, ASME B16.25 |
Sizes | Sizes available on Request, 1/8 to 1”, 1/2′ TO 14” |
Working Pressure | Valves are also available which could handle higher pressure, Up to 6000 PSIG |
End Connection | BSPT, Male and Female NPT, Male to Female, Socket Weld (SW) or Dual Ferrule Tube Connections, Female to Female |
Temperature Ratings | (232C)/Grafoil 700 F(371C), PTFE 450F |
Pressure Rating | 150#, 300#, 600#, 800#, 1500# |
Application | Power/ gas/ petroleum/ chemical/ metallurgy/ shipbuilding etc. |
Ends | Flange Ends, Screwed Ends,Socket Weld Ends |
Type | Ball Valves, Globe Valves, Check Valves, Needle Valves, Butterfly Valves |
Temperature Rating | (232C)/Grafoil 700 F(371C),PTFE 450F |
STANDARD | WERKSTOFF NR. | UNS |
Duplex S31803 | 1.4462 | S31803 |
Contact us to get a quick quote for your requirement.
We offer These Duplex Steel S31803 Valves as per DIN, ISO, JIS or ANSI Standard.
Temp. °F | 150 | 300 | 400 | 600 | 900 | 1500 | 2500 |
---|---|---|---|---|---|---|---|
-20 to 100 | 275 | 720 | 960 | 1440 | 2160 | 3600 | 6000 |
200 | 230 | 600 | 800 | 1200 | 1800 | 3000 | 5000 |
300 | 205 | 540 | 720 | 1080 | 1620 | 2700 | 4500 |
400 | 190 | 495 | 660 | 995 | 1490 | 2485 | 4140 |
500 | 170 | 465 | 620 | 930 | 1395 | 2330 | 3880 |
600 | 140 | 435 | 580 | 875 | 1310 | 2185 | 3640 |
650 | 125 | 430 | 575 | 860 | 1290 | 2150 | 3580 |
700 | 110 | 425 | 565 | 850 | 1275 | 2125 | 3540 |
750 | 95 | 415 | 555 | 830 | 1245 | 2075 | 3460 |
800 | 80 | 405 | 540 | 805 | 1210 | 2015 | 3360 |
850 | 65 | 395 | 530 | 790 | 1190 | 1980 | 3300 |
900 | 50 | 390 | 520 | 780 | 1165 | 1945 | 3240 |
950 | 35 | 380 | 510 | 765 | 1145 | 1910 | 3180 |
1000 | 20 | 320 | 430 | 640 | 965 | 1605 | 2675 |
1050 | 20 [1] | 310 | 410 | 615 | 925 | 1545 | 2570 |
1100 | 20 [1] | 255 | 345 | 515 | 770 | 1285 | 2145 |
1150 | 20 [1] | 200 | 265 | 400 | 595 | 995 | 1655 |
1200 | 20 [1] | 155 | 205 | 310 | 465 | 770 | 1285 |
1250 | 20 [1] | 115 | 150 | 225 | 340 | 565 | 945 |
1300 | 20 [1] | 85 | 115 | 170 | 255 | 430 | 715 |
1350 | 20 [1] | 60 | 80 | 125 | 185 | 310 | 515 |
1400 | 20 [1] | 50 | 65 | 95 | 145 | 240 | 400 |
1450 | 15 [1] | 35 | 45 | 70 | 105 | 170 | 285 |
1500 | 10 [1] | 25 | 35 | 55 | 80 | 135 | 230 |
Size | L | a | b | W | H |
---|---|---|---|---|---|
1/8″ | 56 | 28 | 28 | 60 | 80 |
¼” | 56 | 28 | 28 | 60 | 80 |
3/8” | 56 | 28 | 28 | 60 | 80 |
½” | 58 | 28 | 28 | 60 | 81 |
¾” | 62 | 35 | 35 | 60 | 85 |
1” | 70 | 45 | 45 | 70 | 100 |
Port Size (BSP) | Media Pressure | Media Temperature | CV |
---|---|---|---|
1/8″ | 0 to 408 Bar | -20°C to 230°C | |
¼” | 0 to 408 Bar | -20°C to 230°C | 0.4 |
3/8” | 0 to 408 Bar | -20°C to 230°C | 0.4 |
½” | 0 to 408 Bar | -20°C to 230°C | 0.6 |
¾” | 0 to 408 Bar | -20°C to 230°C | 1.6 |
1” | 0 to 408 Bar | -20°C to 230°C | 2.5 |
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
S31803 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0 – 23.0 | 3.0 – 3.5 | 4.50 – 6.50 | 0.14 – 0.20 | 63.72 min |
Grades | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
S31803 | 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
Application Industry
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Global Steel is a significant manufacturer and exporter of all ferrous and non-ferrous metals. As a pioneer and leader in the industry, Global Steel is at the forefront of technology and research.
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