2507 Duplex Stainless Steel Composition
2507 duplex stainless steel is also called super duplex stainless steel, and its composition usually includes the following elements:
- Chromium (Cr): about 24-26%
- Nickel (Ni): about 6-8%
- Molybdenum (Mo): about 3-5%
- Nitrogen (N): about 0.24-0.32%
- Iron (Fe): usually present in the remainder after the alloying elements
In addition to the above main elements, 2507 duplex stainless steel may also contain a small amount of other elements, such as carbon, silicon, manganese, phosphorus, sulfur, copper, etc., and their concentrations are usually very small.
2507 Duplex Stainless Steel Machinability
Machinability refers to the ease with which a material can be machined or formed using various machining processes such as drilling, milling, turning, or threading. Machinability is affected by many factors, including the composition and microstructure of the material.
When it comes to the machinability of 2507 duplex stainless steel, it is generally considered to be somewhat inferior to other stainless steel grades. The high strength and hardness of 2507 duplex stainless steel make it more challenging to process. To optimize the machining performance of 2507, we can proceed from the following aspects:
Cutting Tools: Use high-quality cutting machines designed specifically for machining stainless steel. Carbide inserts with sharp cutting edges, proper tool geometry, coated carbide knives, etc. all contribute to improved machining performance.
Cutting Parameters: Adjust cutting speed, feed rate, and depth of cut according to the specific machining operation and the tool used. Considering the hardness and strength of 2507 duplex stainless steel, optimize parameters to balance material removal rate and tool life.
Cooling and Lubrication: Adequate cooling and lubrication are essential to dissipate heat and reduce friction during machining. Using a coolant or cutting fluid that is suitable for stainless steel can help extend tool life and improve the surface finish of stainless steel.
Tool Wear Monitoring: Regularly monitor tool wear to ensure optimal performance. Replace worn or damaged tools in time to maintain machining quality and efficiency.
In addition, the machinability of 2507 duplex stainless steel may vary due to slight changes in heat treatment and processing.
Duplex 2507 Stainless Steel Properties
Duplex 2507 stainless steel is a super duplex stainless steel grade consisting of elements such as iron (Fe), chromium (Cr), nickel (Ni), molybdenum (Mo), and nitrogen (N). Like 2205 stainless steel coils, it has austenitic and ferritic structures and has many advantages:
- High strength and excellent toughness
- excellent corrosion resistance
- Resistant to pitting and crevice corrosion
- Good resistance to stress corrosion cracking
- good weldability
- high thermal conductivity
- low thermal expansion
Welding 2507 Duplex Stainless Steel
Whether welding 304, 316, or 410 stainless steel coils, or duplex stainless steel coils with superior properties, multiple factors need to be considered when welding to ensure weld quality and maintain the required properties of the material. Here are some key points to keep in mind when welding 2507 duplex stainless steel:
Welding Process: Commonly used welding processes for 2507 duplex stainless steel include electrode arc welding (SMAW), argon tungsten arc welding (GTAW), plasma arc welding (PAW), and flux cored arc welding (FCAW). Each process has its advantages and considerations, and the selection of the appropriate process depends on the specific application and requirements.
Preheating and Interpass Temperature: Preheating the base metal and controlling the interpass temperature are important to reduce the risk of cracking. Preheat temperatures are typically 150°C to 250°C (300°F to 480°F) and interpass temperatures should be controlled to avoid excessive heat input.
Filler Metal: Selecting the correct filler metal is also important for optimal weld performance. Typically, a matching or superalloyed duplex stainless steel filler metal is used, such as AWS A5.4 E2507 or E2594.
Shielding Gas: When welding 2507 duplex stainless steel with gas shielding, high-purity argon or argon/helium mixtures are usually used to help protect the weld pool from atmospheric contamination and minimize the risk of nitrogen absorption.
Post-Weld Heat Treatment: In some applications, post-weld heat treatment (PWHT) is required to achieve the desired properties. This may involve solution annealing followed by water quenching air cooling, or stress relief at lower temperatures.
Additionally, proper weld inspection and testing, such as visual inspection, dye penetrant testing, or radiographic inspection, can help verify the quality of the weld.
Duplex 2507 Stainless Steel Prices
Duplex 2507 stainless steel coils are high-end stainless steel materials. The price is relatively higher than that of 300-series and 400-series stainless steel coils. There are occasional fluctuations and will be affected by many factors:
Market Supply and Demand Situation: The supply and demand situation in the stainless steel market has a direct impact on prices. If demand is higher than supply, prices may rise; if there is excess supply, prices may fall.
Material Specifications: The prices of duplex 2507 stainless steel coils of different specifications and sizes will also vary in the market. Typically, larger gauge coils are more expensive, while smaller gauge coils are less expensive.
Order Quantity: Duplex 2507 Stainless Steel Coil can usually be ordered at a more competitive price in larger quantities. If the quantity is large, the price will be better, and you can negotiate discounts or discounts with suppliers.
Application Field of 2507 Stainless Steel Coil
- Oil and Gas Industry: such as pipelines, storage tanks, valves, etc.
- Chemical Industry: such as reactors, heat exchangers, storage tanks, containers, pipelines, etc.
- Ocean Engineering: such as manufacturing offshore platforms, submarine pipelines, ships, seawater desalination plants, high-pressure reverse osmosis equipment, etc.
- Medical Industry: such as surgical instruments, implants, etc.
- Construction and Structure Fields: 2507 stainless steel coils are widely used in building facades, roofs, bridges, and other structures.
- Paper and Fiber Industry: such as steam generators, storage tanks, conveyors, etc.
Duplex 2507 Stainless Steel Manufacturer
Gnee Steel Group is a professional supply chain enterprise, mainly engaged in the processing of steel plates, coils, profiles, and outdoor landscape design. After 15 years of development, it has become a leading international steel supply chain company in the Central Plains. Relying on Angang and other iron and steel enterprises, we have a wide variety of products, including shipbuilding plates, pressure vessel plates, bridge decks, etc. At the same time, we provide pipes, bars, engineering design and manufacturing, and comprehensive stainless steel solution services. Cooperating with more than 600 companies around the world, the annual export capacity exceeds 80,000 metric tons. Choose Gurney Steel Group, you choose a professional and reliable steel supply chain partner!
