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 A269/ASME SA269 STAINLESS STEEL TUBE | ASTM A269/ASME SA269stainless steel tube covers the nominal wall thickness grades of stainless steel pipe specified in the standard for general cor... |
 |
C44300 COPPER ALLOY STEEL TUBE | C44300 Copper Alloy Pipe ASTM B111 C44300 tube is widely used in the surface condenser, heat exchanger, and evaporators. The C44300 tube offers hi... |
 |
ASTM A249/ASME SA249 STAINLESS STEEL TUBE | ASTM A249/ASME SA249stainless steel tube covers nominal wall thicknesses welded and heavily cold-worked welded pipes made of the following material... |
 |
DUPLEX STEEL PIPE/TUBE | The microstructure of duplex stainless steel pipe is approximately 50% ferrite (body-centered cubic structure) and 50% austenite (face-centered cub... |
 |
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... |
Same products
 |
Sodium tripolyphosphate（STPP） 7758-29-4 | 卖方: Syntop chemical Co.,Ltd. | Sodium tripolyphosphate has a wide range of uses, because of its dispersion, chelating, gelling, ... |
 |
L12301 12 Inch Brushless Chain Saw | 卖方: Zhejiang Huaqi Information Technology Co., LTD | 额定电压：20V 电链锯线速度：7.6m/s 空载电流：6A 额定功率：1000W 锯片规格：12” 最大切割直径：250mm 刹车：有 () |
 |
南非-低温供应容器价格-实验室杜瓦瓶 KGSQ | 卖方: 河南天之道生物科技有限公司 | 随着科技的不断发展，低温储存技术越来越多的应用于生物医学、科研实验和工业等多个领域。其中，液氮供应罐以其比传统的液氮容器更加持久和稳定的低温条件，被广泛的应用于这些领域。 液氮供应罐主要用于储存... |
 |
High quality Xylitol with competitive price | 卖方: Syntop chemical Co.,Ltd. | Industrial xylitol is a food additive, mainly used to improve taste, provide energy, laxative, im... |
 |
圭亚那-低温供应容器-液氮细胞储存 | 卖方: 河南天驰仪器设备有限公司 | 随着科技的不断发展，低温储存技术越来越多的应用于生物医学、科研实验和工业等多个领域。其中，液氮供应罐以其比传统的液氮容器更加持久和稳定的低温条件，被广泛的应用于这些领域。 液氮供应罐主要用于储存... |
