ASTM A789 UNS S31803 chemical composition and specification
Find trustworthy SA 789 UNS s31803 tubing suppliers in UAE at a fair price; learn more about ASTM a789 here.
What is ASTM A789?
ASTM A789 is one of the duplex steel grades with better properties in heat-treated conditions at 20 ℃ than the other grade steels. S 31803 is one of the early ASTM Grades of super duplex steels to be popular even after many decades. It is because of the good corrosion resistance, especially for resisting stress-related corrosion cracking. While making A789 UNS S31803 tubes through the welded or seamless process, there is no need to add any filler metal. Also, It is easy to quench these tubes in cool water or air to a temperature of 980 to 1040 ℃ or 1800 F to 1900 ºF. ASTM A789 UNS S31803 Tubing has 200 GPa elastic modulus, 25% elongation,620 MPA tensile strength, 290 Brinell hardness, 450 MPa yield strength, and other excellent properties.
Purchase a789 s31803 seamless tube stock from the Middle East and Asia stockist with a variety of lengths. see sa 789 UNS s31803 versus a182 f51 comparison
SA 789 UNS S31803 vs A182 f51
SA 789 UNS S31803 and A182 F51 are both duplex steel families with almost the same chemical composition and similar properties. But A789 is the ASTM International specification for seamless and welded tubes. The ASTM specification for A182 is for stainless steel pipe flange, forged fitting, and valves required for high-temperature services.
- SA 789 UNS S 31803 is best for chemical processes that involve chlorine and sulphide, which A182 f51 is also ideal to use.
- ASTM A789 S31803 Tube is best for use between the temperature range of -50 ºF to + 600ºF, which differs for the A 182 F1
Compare the costs of at least two reliable importers of ASTM a789 UNS s31803 tubing in Dubai, and find out sa 789 UNS s31803 is better than 316.
Is SA 789 UNS S31803 better than 316?
SA 789 UNS S31803 is better than 316 as it combines ferritic and austenitic microstructure to be duplex steels. But 316 is only austenitic steel and not ferritic to have many properties of ASME SA 789 UNS S31803 Welded Tube .
316 is the most popular stainless steel but has less chromium of 16 to 18% than the 21 to 23 % in SA 79 UNS S 31803 to have high corrosion resistance and hence used in many extreme environments.
Due to their composition differences, the austenitic 316 and duplex SA 79 UNS S31803 are used in unique applications in many sectors.
Various types of ASTM A789 UNS s31803 tube
SA 789 UNS s31803 tubing
A789 s31803 seamless tube
ASTM a789 UNS s31803 tubing
A789 UNS S31803 welded tube
UNS S31803 tubing
ASME SA789m UNS s31803 tubes
many of the mentioned traders supply a789 UNS s31803 welded tube from renowned manufacturers like Tenaris, Sandvik, and Thyssenkrupp, compare UNS s31803 vs. UNS s32750
ASTM A789 UNS S31803 vs S32750
Out of the duplex steel grade family having many specific formulations, ASTM A789 UNS S31803 and S32750 are the most popular. Because of their high strength and corrosion properties, duplex steel is in high demand to make tubes. ASTM A789 UNS S31803 welded tube, and UNS S 32750 tubes are versatile for use in oil & gas, chemical processing industries, etc.ASTM A789 UNS 31803 tubes are less corrosion resistant to UNS S 32750 as the chromium is high, up to 25%, whereas it is only up to 23% in 31803. Also, UNS S 32750 has more nickel and molybdenum than 31803 to be stronger and have other unique uses.
In the GCC countries, numerous distributors of UNS s31803 tubing offer cut-to-length services; for more information, see a789m UNS s31803 tubes cons and benefits
Pros and cons of SA 789 UNS S31803 seamless tube
There are more pros than cons of SA 789 UNS S31803 seamless pipe has more pros and cons. Hence, SA 789 pipes are in high demand for applications in many industry verticals for decades.
A few of the pros include.
- High corrosion resistance, including pitting, crevice, chloride, and stress corrosion at high temperature
- Easy to weld even without needing preheating and will not crack under heat influence or pressure
- With high thermal conductivity, best to make heat exchangers and others.
Cons of ASTM A789 UNS S31803 seamless tubing are the low heat resistance and its restricted use at temperatures below 300 C or 572 ºF.