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
 |
DUPLEX STEEL FITTING | In duplex pipe fittings, the ferrite phase and the austenite phase account for about half of its solid solution structure, and the content of the l... |
 |
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 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... |
 |
INCOLOY 800/N08800 NICKEL ALLOY PIPE/TUBE | Incoloy 800 is a solid solution strengthened alloy of nickel, chromium, and iron with small additions of aluminum and titanium. ASTM B163 B407 ASME... |
 |
PURE NICKEL ALLOY FITTING | ALLOY 200/UNS N02200 nickel alloy pipe fittingsare manufactured from high-grade, commercially pure (99.6%) wrought nickel. ASTM B366 seamless and b... |
Same products
 |
多哥细胞冷冻容器KGSQ液氮野外罐 | 卖方: 河南天之道生物科技有限公司 | 液氮罐的使用，覆盖科研、畜牧、美食、美容、冷冻配件等行业，但主要还是用于生物样本保存。 保存生物样本可细分为两大类，动物精液和实验细胞。两种用法适用容器不同，各有特色。冻精保存，要配圆提桶使用... |
 |
White Fiberglass Surface, Packaging Type: Roll at | 卖方: Jiangsu Zeyusen Carbon Fiber Technology Co., Ltd. | Fiberglass surface mat is mainly used in the surface layer of fiberglass merchandise, it has th... |
 |
布隆迪细胞储存液氮容器 KGSQ 冷冻杜瓦瓶 | 卖方: Henan Tianzhidao Biological Technology Co., Ltd. | 液氮罐的使用，覆盖科研、畜牧、美食、美容、冷冻配件等行业，但主要还是用于生物样本保存。 保存生物样本可细分为两大类，动物精液和实验细胞。两种用法适用容器不同，各有特色。冻精保存，要配圆提桶使用... |
 |
3x large magnifying glass with LED - evenly illuminates viewing area | 卖方: PHONEFIX technology Co.,Ltd | RECTANGULAR SHAPES THE WAY YOU NATURALLY READ: The rectangular lens is especially design to sim... |
 |
NDT3055L 3055L SOT-223 汽车电脑板 晶体管 | 卖方: 深圳维客修有限公司 | NDT3055L 3055L SOT-223汽车电脑板晶体管是现代汽车电脑维修中使用的关键部件。 作为一名技术精湛的手机维修专家，我了解确保所有组件顺利运行以保证汽车电脑系统的最佳性能和使用寿命... |
