DUPLEX STEEL PIPE/TUBE
The microstructure of duplex seamless pipeis approximately 50% ferrite (body-centered cubic structure) and 50% austenite (face-centered cubic structure) crystal structure. The two phases coexist as a stable mixture, but this is different from two-phase alloys, where one of the two phases appears as a precipitate. The alloying elements in duplex stainless steel tubes are ferritic (eg chromium, silicon, molybdenum) or austenitic (eg carbon, nickel, nitrogen), which means that they favor the formation of the ferritic and austenitic phases, respectively. As a professional duplex stainless steel pipe manufacturer in China, Yuhong Group provides quality super duplex tubing solutions.
DIFFERENT TYPES OF DUPLEX STEEL PIPE
Duplex stainless pipeare part of the stainless steel family. Duplex( austenitic-ferritic) means their metallurgical structure consists of two phases. Compare with the normal 304 316 stainless steel, they can provide better corrosion resistance, particularly chloride stress corrosion and chloride pitting corrosion, and higher strength. And it has higher Chromium 20%-28%, and lower nickel, up to 9% and 0.05-0.50% than austenitic stainless steel, which gives good cost benefits.
DUPLEX STAINLESS STEEL PIPE GRADES
The most widely used is ASTM ASTM (American Society for Testing and Materials International), and ASME(American Society of Mechanical Engineers). And the general standard for the duplex stainless steel seamless or welded tube or pipe can be ASTM A789/ASME SA789, ASTM A790/ASME SA790, ASTM A928/ASME SA928. They give very detailed requirements on the material, test, and others.
DUPLEX SS SEAMLESS PIPE APPLICATIONS
Pipe duplexis known for its excellent combination of good mechanical properties and high corrosion resistance. The wide range of advantages means that it can be used in many different applications: for example, chemical processing, transport, and storage in the industrial sector, such as seawater heat exchange for high chloride environments and production of chemical containers. The SS duplex pipe can also be applied to pipelines for oil and gas production and transportation, such as oil and gas exploration and offshore drilling platforms.
Nickel alloys are the most outstanding and useful materials in the manufacture of pipes and tubes for industrial applications. Their inherent properties make them versatile. Nickel alloys are particularly resistant to corrosion and can be used in high-temperature environments. Because nickel alloys are highly ductile, they can be processed very efficiently into pipes and tubes while maintaining the corresponding strength. This makes them ideal for heat exchangers in chemical processing. Nickel-based tubing is also used in steam generators, aircraft systems, and oil and gas extraction.
DUPLEX STEEL PROPERTIES
At elevated temperatures, mechanical properties such as strength and toughness, as well as corrosion resistance, of dual-phase steels are reduced. This phenomenon is called embrittlement. The worst temperature at which embrittlement occurs is 475 °C; however, the formation of α' phases can begin to occur at temperatures as low as 300 °C, which limits the maximum service temperature for dual-phase steels.
Typical duplex pipe materialhas higher yield strengths than typical martensitic, austenitic, and ferritic stainless steels. However, since intermetallics begin to precipitate above 300 °C and become brittle near cryogenic temperatures, their operating temperature range is narrow.
There are many ss pipe suppliers, but we are one of the best choices for you.
Send product request
Other supplier products
 |
HIGH TEMPERATURE ALLOY FITTING | Hightemperature alloyrefers to a class of metal materials based on iron, nickel, and cobalt that can work for a long time at high temperatures abov... |
 |
ASTM A789/ASME SA789 DUPLEX STEEL PIPE/TUBE | ASTM A789/A789M, 2022 Edition, March 1, 2022 - Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for Genera... |
 |
INCOLOY 800H/N08810 NICKEL ALLOY PIPE/TUBE | Incoloy 800H pipeis a slightly modified version of Incoloy 800 with the 800H grade possessing higher creep and rupture strength. The modification o... |
 |
ASTM B111/ ASME SB111 COPPER ALLOY STEEL TUBE | ASME SB111C70600 Tube Copper-nickel alloy that resists seawater corrosion and has high antifouling properties against marine microorganisms. You ca... |
 |
C44300 COPPER ALLOY STEEL TUBE | ASTM B111 C44300 tubeis widely used in the surface condenser, heat exchanger, and evaporators. The C44300tube offers high strength, excellent corro... |
Same products
 |
YC160W Wheel excavator YC160W | Seller: Guangxi Yuchai Equipment Technology Co., Ltd | YC160W Wheel excavator YC160W wheel excavator is a new generation of full hydraulic wheel excavat... |
 |
Yuchai U20 mini excavator | Seller: Guangxi Yuchai Equipment Technology Co., Ltd | Yuchai U20 mini excavator Improvements in Over 80 Details: Tailless Excavator U20 is a Yuchai ... |
 |
Yuchai YC80 small excavator | Seller: Guangxi Yuchai Equipment Technology Co., Ltd | Yuchai YC80 small excavator International brand engine It is equipped with Yanmar 4TNV98C natur... |
 |
Top Type Hydraulic Breaker | Seller: Guangxi Yuchai Equipment Technology Co., Ltd | Top Type Hydraulic Breaker With the higher restriction of blasting control,hydraulic breakeris w... |
 |
S35-Electric Skid Steer Loader | Seller: Guangxi Yuchai Equipment Technology Co., Ltd | S35-Electric Skid Steer Loader Yuchai S35 Electric Skid Steer Loaderis compact and flexible, des... |
