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.
在线联系供应商
Other supplier products
 |
ASTM A249/ASME SA249 STAINLESS STEEL TUBE | a249 stainless steel tube astm a249 tubing/ a249 tubing astm a249 pdf astm a249 tp304 specification ASTM A249stainless steel tube covers nomi... |
 |
C70600 COPPER ALLOY STEEL TUBE | C70600 tube/pipe using UNS C70600 coppernickelalloy is primarily used in seawater service as forged and machined valve and pump components, fitting... |
 |
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... |
 |
ASTM B111/ ASME SB111 COPPER ALLOY STEEL TUBE | ASME SB111 C70600 Tube Copper-nickel alloy that resists seawater corrosion and has high antifouling properties against marine microorganisms. You c... |
 |
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... |
Same products
 |
Bottle Blowing Machine | 卖方: Taizhou Qihong Mold Co., Ltd. | Taizhou Qihong Mold Co., Ltd. offers Bottle Blowing Machines designed for efficient plastic bottl... |
 |
480ml corrosion-resistant transparent PET bottle | 卖方: Suzhou Brotherpacking Plastic Co., Ltd. | This 480ml corrosion-resistant transparent PET bottle is ideal for packaging personal care produc... |
 |
a-peng太平鸟 mosaic | 卖方: 成飞经理，15813639200：李老师 后面华兴玻璃厂 ，高速大丰田阿波罗 集美天成 | jaoisan i snxian xiang 1stfotr .sliay t love ? 2jian xiang qian all fors king stsan put hongdou... |
 |
soaali soaali umisan 1st psn g A-peng tai[ping yihui niuao 1st 太平鸟 阿-鹏经理 阿波罗umisan 1st psn g A-peng tai[ping yihui niuao 1st 太平鸟 阿-鹏经理 阿波罗 | 卖方: 成飞经理，15813639200：李老师 后面华兴玻璃厂 ，高速大丰田阿波罗 集美天成 | s哦爱你 osain lsaowo jyou li jhgoan psaeng wate laian hsi xingjing boadao soa nisan io2 naspau nsaia... |
 |
Printed Patterned Cotton Kinesiology Tape | 卖方: Suzhou Compass Co., Ltd. | Cotton Kinesiology tapes with custom graphics, branding, or patterns. Material High-quality 95% c... |
