ASTM B622 Hastelloy C276 легированная бесшовная стальная труба UNS N10276/GH276 GB коррозионно-стойкая для

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Hastelloy C276 is a nickel-based alloy known for its excellent corrosion resistance. It is composed of nickel, molybdenum, chromium, iron, and other elements, with small amounts of tungsten and copper. Hastelloy C276 is renowned for its wide-ranging resistance to corrosion, making it particularly suitable for applications involving strong acids, alkalis, and oxidizing media.

Here are some key features and advantages of Hastelloy C276:

Corrosion resistance: Hastelloy C276 exhibits exceptional corrosion resistance in a wide range of corrosive media, including sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid, etc. It also has good resistance to chloride ions, making it widely used in seawater and chloride environments.

Stress corrosion cracking resistance: Hastelloy C276 possesses good resistance to stress corrosion cracking, maintaining its structural integrity in high-temperature and corrosive environments.

High-temperature performance: The alloy demonstrates excellent high-temperature strength and oxidation resistance, allowing for long-term stability in high-temperature environments.

Versatile applications: Hastelloy C276 finds extensive applications in chemical, petroleum and gas processing, marine engineering, pharmaceuticals, food processing, and other industries. It can be used for manufacturing reactors, heat exchangers, equipment for handling corrosive media, petrochemical plants, and more.

Overall, Hastelloy C276 is a multifunctional high-performance alloy with outstanding corrosion resistance and mechanical properties, suitable for various harsh industrial environments. Its use can enhance the lifespan of equipment and ensure safe operation.

Hastelloy C276 is a high-performance alloy known for its excellent corrosion resistance. Here is some general information about the chemical composition, physical properties, and mechanical performance of Hastelloy C276:

Chemical Composition:

• Nickel (Ni): Approximately 55-59%


• Molybdenum (Mo): Approximately 15-17%


• Chromium (Cr): Approximately 14.5-16.5%


• Iron (Fe): Maximum content of 7%


• Tungsten/Manganese (W/Mn): Maximum content of 3%


• Vanadium (V): Maximum content of 0.35%


• Silicon (Si): Maximum content of 0.08%


• Carbon (C): Maximum content of 0.01%

Physical Properties:

• Density: 8.89 g/cm³


• Melting Point: Approximately 1,370°C


• Thermal Conductivity: 10.2 W/(m·K) at room temperature


• Coefficient of Linear Expansion: 11.2 μm/m·K (20-100°C)

Mechanical Performance:

• Yield Strength (Tensile Strength): Approximately 310 MPa (at room temperature, long-term exposure)


• Ultimate Tensile Strength: Approximately 675 MPa (at room temperature, long-term exposure)


• Elastic Modulus: Approximately 205 GPa (at room temperature)

It's important to note that these values are general guidelines, and the specific chemical composition and performance parameters may vary depending on different standards, manufacturers, and specific material batches. For more precise data, please refer to relevant technical specifications or consult with suppliers.

 

Production Process

The raw material for carbon steel pipe is round tube billet, and the round tube embryo should be cut by cutting machine to grow billets with a length of about 1 meter, and transported to the furnace by conveyor belt. Billet is fed into the furnace to heat, the temperature is about 1200 degrees Celsius. The fuel is hydrogen or acetylene. The temperature control in the furnace is a key issue. After the round tube is out of the furnace, it must be pierced through a pressure piercer. Generally, the more common piercer is the cone roll piercer. This kind of piercer has high production efficiency, good product quality, large perforation diameter expansion, and can wear a variety of steel types. After piercing, the round tube billet is successively cross-rolled, continuous rolled or extruded by three rolls. After extrusion, the tube should be taken off for sizing. Sizing by high-speed rotary cone drill holes into the billet to form a tube. The inner diameter of the steel pipe is determined by the length of the outer diameter of the drill bit of the sizing machine. After the steel pipe is sized, it enters the cooling tower and is cooled by spraying water. After the steel pipe is cooled, it will be straightened. After straightening, the steel pipe is sent to the metal flaw detector (or hydraulic test) by the conveyor belt for internal flaw detection. If there are cracks, bubbles and other problems inside the steel pipe, they will be detected. After the quality inspection of steel pipes, strict manual selection is required. After the quality inspection of the steel pipe, paint the serial number, specification, production batch number, etc. with paint. And hoisted into the warehouse by crane.

Due to their different manufacturing processes, seamless steel pipes are divided into two types: hot-rolled (extruded) seamless steel pipes and cold-drawn (rolled) seamless steel pipes. Cold drawn (rolled) tubes are divided into two types: round tubes and special-shaped tubes.

   Coldd rawn (rolled) seamless steel pipe:                 roundtubeblank→heating→perforation→heading→annealing→pickling→oiling(copper plating)→multi-pass cold drawing (cold rolling)→blank tube→heat treatment→straightening→ Quality inspection wall thickness→hydraulic test (flaw detection)→marking→storage.

Quality inspection

Hastelloy C276 has a wide range of applications due to its excellent corrosion resistance and high-performance characteristics. Some common applications of Hastelloy C276 include:

1. 
   

   Chemical Processing: Hastelloy C276 is widely used in the chemical processing industry for handling corrosive chemicals, acids, and gases. It is used in reactors, heat exchangers, piping systems, and storage tanks.

   
   


2. 
   

   Petrochemical Industry: Hastelloy C276 is utilized in the petrochemical industry for equipment exposed to aggressive environments, such as sulfuric acid, chlorides, and hydrochloric acid. It finds applications in distillation columns, valves, pumps, and flue gas desulfurization systems.

   
   


3. 
   

   Pollution Control: Due to its resistance to chlorine and other oxidizing agents, Hastelloy C276 is commonly employed in pollution control equipment, including scrubbers, stack liners, and exhaust systems.

   
   


4. 
   

   Oil and Gas: Hastelloy C276 is used in oil and gas exploration and production due to its resistance to pitting, crevice corrosion, and stress corrosion cracking. It is utilized in downhole tubing, wellhead components, and offshore platforms.

   
   


5. 
   

   Pharmaceutical Industry: Hastelloy C276 is suitable for pharmaceutical applications where corrosion resistance and cleanliness are crucial. It is used in reactors, agitators, and pharmaceutical processing equipment.

   
   


6. 
   

   Aerospace and Marine: Hastelloy C276 is applied in aerospace and marine industries for components exposed to seawater, acidic atmospheres, and high-temperature environments. It finds applications in aircraft ducting systems, seawater cooling systems, and marine exhaust systems.

   
   


7. 
   

   Waste Treatment: Hastelloy C276 is resistant to a wide range of corrosive chemicals found in waste treatment facilities. It is used in incinerators, scrubbers, and chemical storage tanks.

   
   

These are just a few examples, and the versatility of Hastelloy C276 makes it suitable for various industries where corrosion resistance and high-performance materials are required.