Hot Selling Duplex 2205 U-Bolt

2025-08-02 07:04:13
**Product Information**
  • Model NO.: Duplex 2205
  • Type: Hexagon Head
  • Head Style: Hexagonal
  • Grade: Duplex 2205
  • Finish: Polishing
  • Nearest Port: Shanghai
  • Customized Size: Acceptable Upon Request
  • Processing Technology: Hot Forging
  • Specification: M5-M100
  • HS Code: 7318159090
  • Material: Duplex 2205
  • Connection: Common Bolt
  • Standard: DIN, ANSI, GB, JIS, BSW, GOST
  • Application: Machinery
  • Size: M5-M100
  • Means of Transportation: by Sea or by Air
  • Delivery Date: 30 days
  • Trademark: TM
  • Origin: China
--- **Duplex 2205 (UNS S31803)** is a nitrogen-enhanced duplex stainless steel designed to overcome common corrosion issues typically seen with 300 series stainless steels. The term "duplex" refers to a family of stainless steels that are neither fully austenitic like 304, nor purely ferritic like 430. Instead, Duplex 2205 has a microstructure composed of austenite pools surrounded by a continuous ferrite phase. In the annealed condition, it contains approximately 40-50% ferrite. Often called the "workhorse grade," Duplex 2205 is the most widely used in the duplex stainless steel family. Its unique structure offers a combination of the favorable properties of both ferritic and austenitic alloys—such as high strength, resistance to stress corrosion cracking, and good formability. It's important to note that the use of Duplex 2205 should be limited to temperatures below 600°F (315°C). Prolonged exposure to elevated temperatures can cause embrittlement. This material is an economical choice for applications where 300 series stainless steels are prone to chloride stress corrosion cracking. Stress corrosion cracking occurs when stainless steels are exposed to tensile stress while in contact with chloride-containing solutions, and higher temperatures increase this risk. The combination of chromium, molybdenum, and nitrogen gives Duplex 2205 excellent resistance to chloride pitting and crevice corrosion. This makes it ideal for marine environments, brackish water, bleaching operations, closed-loop water systems, and some food processing applications. Compared to standard stainless steels like 316L and 317L, Duplex 2205 provides superior corrosion resistance in most environments. --- **Chemical Composition (wt%)** | Element | Min | Max | |---------|-----|-----| | Cr | 22.0 | 23.0 | | Ni | 4.50 | 6.50 | | Mo | 3.00 | 3.50 | | C | - | 0.030 max | | N | 0.14 | 0.20 | | Mn | - | 2.00 max | | Si | - | 1.00 max | | P | - | 0.030 max | | S | - | 0.020 max | | Fe | - | Balance | --- **Mechanical Properties** | Property | Value | |---------------------------------|-----------| | Ultimate Tensile Strength (ksi) | 95 min | | 0.2% Yield Strength (ksi) | 65 min | | Hardness (max) | 31 Rockwell C | --- **Additional Details:** - **Mark:** TM - **Material:** Duplex 2205 (UNS S31803) - **Finish:** Polishing - **Certificate:** ISO9001:2008, SGS - **Packaging Detail:** 20–25 kg per carton, 36–48 cartons per pallet or as per customer requirements - **Customer Service:** 24-hour support, quick response to all suggestions and feedback At TOMORROW, we specialize in manufacturing a wide range of exotic alloy fasteners, including Hex Bolts, Hex Nuts, Allen Bolts, Plain Washers, Thread Studs, and more. Our materials include Hastelloy C-276, C-22, B3, Incoloy 825, 925, 926, 800HT, Inconel 600, 625, X-750, 725, 718, Monel 400, K500, Duplex 2205, Super Duplex 2507, 904L, F44, Titanium, Nimonic 80A, GH113, GH3039, GH2032, 17-4PH, 20Cb-3, 6XN, 347H, and many others. Our hot-forged fastener size range spans from M5 to M100. Our goal is to develop innovative, high-quality exotic alloy fasteners that are durable, time-saving, and cost-effective. We believe that customer service is just as important as product quality. Our team is always ready to help analyze your requirements and recommend the best system for your needs. We stock a broad range of standard products and can produce custom systems economically to meet your design specifications. We are people who deliver what we say, when we say. At TOMORROW, we pride ourselves on dependability in design, engineering, manufacturing, and service. Welcome to reach out anytime you feel it’s convenient. We look forward to working with you!

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