Yuhong Group Co.,Ltd
Yuhong Holding Group Co.,LTD
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ASME SA789 S31803 Duplex Steel Seamless Tube For Chemical Processing
YUHONG has been dealing in seamless and welded pipes of austenitic stainless steel, nickel alloy steel (Hastelloy, Monel, Inconel, Inconel) for more than 25 years, and sells more than 80,000 tons of steel pipes and pipes each year. Our customers have covered more than 45 countries, such as Italy, the United Kingdom, Germany, the United States, Canada, Chile, Colombia, Saudi Arabia, South Korea, Singapore, Austria, Poland, France... and our group branches and factories have been Pass: ABS, DNV, GL, BV, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9001-2008, ISO 14001-2004.
UNS 31803 (F51), UNS 32205 (F60) Alloy 2205, UNS S32550 (F61), UNS S 32750 (F53), Alloy 2507 and UNS 32760 (F55)
Standards: ASTM/ASME A789/SA789, A790/SA790, A450, A530
Material: UNS S31803(Cr22Ni5Mo3/1.4462)/2205, UNS S32750(1.4410), UNS S31500(Cr18NiMo3Si2), UNS32760(1.4501)
Chemical Composition
| Grade | C max | Si max | Mn max | P max | S max | Cr | Ni | Mo | N |
| UNS S32750 | 0.030 | 0.8 | 1.2 | 0.030 | 0.015 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 |
| UNS S31803 | 0.030 | 1.0 | 2.0 | 0.020 | 0.020 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
| UNS S31500 | 0.030 | 1.0 | 1.2-2.0 | 0.030 | 0.030 | 18.0-19.0 | 4.5-5.5 | 2.5-3.5 | 0.05-0.10 |
Physical Properties
| Grade | Y.S.MPa min | T.S.Mpa min | Elongation % | Hardness HRC |
| UNS S32750 | 550 | 800 | 15 | 20 |
| UNS S31803 | 450 | 620 | 25 | 20 |
| UNS S31500 | 440 | 630 | 30 | 20 |
Mechanical Properties
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell C (HR C) | Brinell (HB) | ||||
| UNS S31803 | 621 | 448 | 25 | 31 max | 293 max |
31803/32205 Equivalent grades
STANDARD | WERKSTOFF NR. | UNS |
|---|---|---|
Alloy 2205 Pipe | 1.4462 / 1.4462 | S31803 / S32205 |
A789 specification covers standard requirements for grades of nominal wall thickness, stainless steel tubing for services requiring general corrosion resistance, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.
Heat and product analyses shall be performed wherein the steel shall conform to the required chemical composition for carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, nitrogen, copper, and others.
Applications
Chemical processing, Transport and Storage
Oil and gas exploration and offshore rigs
Oil and gas refining
Marine environments
Pollution control equipment
Pulp and paper manufacturing
Chemical process Plant
