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GB 5310 20MnG high pressure seamless boiler tubes
GB 5310 20MnGhigh pressure seamless boiler tubes are another low-alloy steel that is commonly used for making high-pressure seamless boiler tubes.
Description
GB 5310 20MnGhigh pressure seamless boiler tubes are another low-alloy steel that is commonly used for making high-pressure seamless boiler tubes.
20MnG high-pressure seamless boiler tubes have similar applications to 15MoG, including use in power plant boilers, where they can be found as superheaters, reheaters, steam pipes, and other high-pressure components. The working pressure for the use of these tubes is typically above 9.8 MPa and the working temperature is between 450℃ and 650℃.
Some of the key features of 20MnG high-pressure seamless boiler tubes include good strength, toughness, corrosion resistance, and dimensional accuracy. They also have a low thermal expansion coefficient that reduces thermal stress during operation.
The production and use of 20MnG high-pressure seamless boiler tubes also must comply with strict standards to ensure their safety and reliability. Different end types are available, such as plain end, beveled end, or threaded ends, and the tubes can come in various lengths, outer diameters, and wall thicknesses.
In summary, GB 5310 20MnG is another low-alloy steel that offers excellent mechanical properties and high-temperature strength. 20MnG high-pressure seamless boiler tubes are widely used in power plant boilers, and their quality and performance are essential factors in ensuring reliable and safe operation.
Manufacturing methods
(1)Steel smelting method
GB 5310 20MnG steel will be smelted by electric furnace plus furnace refining, oxygen converter plus furnace refining or electroslag remelting method.
(2)Manufacturing methods and requirements for tube blanks
The 20MnG tube blank can be produced by continuous casting, die casting or hot rolling (forging).
(3)Manufacturing method of steel tube
GB 5310 20MnG Steel tubes shall be manufactured by hot rolling (extrusion, expansion) or cold drawing (rolling).
GB 5310 20MnG is another low-alloy steel that is commonly used for making high-pressure seamless boiler tubes.
Chemical composition of GB 5310 20MnG high pressure seamless boiler tubes
| Steel Grade | C | Si | Mn | S | P |
| 20 MnG | 0.17-0.24 | 0.17-0.37 | 0.70-1.00 | 0.015 | 0.025 |
Mechanical properties of GB 5310 20MnG high pressure seamless boiler tubes
|
Grade
|
Tensile strength | Yield point(Mpa) | Elongation(%) | Impact(J) |
| (Mpa) | not less than | not less than | not less than | |
| 20MoG | 415-665 | 220 | 22/20 | 40/27 |
Application of GB 5310 20MnG high pressure seamless boiler tubes:
GB 5310 20MnG is a low-alloy steel that is commonly used to manufacture high-pressure seamless boiler tubes. The applications of 20MnG include:
- Superheaters: 20MnG high-pressure seamless boiler tubes are used to construct superheaters in power plant boilers. Superheaters increase the temperature of steam to improve the efficiency of the power plant.
- Reheaters: Similar to 15MoG, 20MnG high-pressure seamless boiler tubes are also used to make reheaters in power plant boilers. Reheaters reheat the steam after it has passed through the turbine’s first stage.
- Steam Pipes: 20MnG high-pressure seamless boiler tubes are used to transport high-pressure steam between the different stages of the power generation process in power plant boilers.
- Other high-pressure components: In addition to superheaters, reheaters, and steam pipes, 20MnG high-pressure seamless boiler tubes are used to make other high-pressure components such as headers, steam walls, and economizers, among others.
20MnG high-pressure seamless boiler tubes are critical components in power plant boilers, and their quality and performance must meet strict standards for production and use to ensure reliable and safe operation. These tubes offer excellent strength, toughness, corrosion resistance, and dimensional accuracy, making them suitable for use in various industrial applications.
The main features of GB 5310 20MnG high pressure seamless boiler tubes:
GB 5310 20MnG is a low-alloy steel that is commonly used to produce high-pressure seamless boiler tubes. Some of the main features of 20MnG include:
- High strength: 20MnG has good tensile strength and yield strength, which makes it suitable for use in high-pressure applications.
- Good toughness: 20MnG has excellent toughness, which reduces the risk of brittle fracture during operation.
- Corrosion resistance: The composition of 20MnG includes elements like manganese, which provide good resistance to corrosion and oxidation at high temperatures.
- Low thermal expansion coefficient: 20MnG has a low thermal expansion coefficient, which reduces the risk of thermal stress during operation.
- Good dimensional accuracy: 20MnG high-pressure seamless boiler tubes have precise dimensions and tolerances, which ensures that they fit perfectly and function correctly in their intended applications.
- Reliable performance: When manufactured according to strict standards, 20MnG high-pressure seamless boiler tubes offer reliable and safe performance in high-pressure, high-temperature applications.
In summary, 20MnG high-pressure seamless boiler tubes are known for their high strength, good toughness, corrosion resistance, low thermal expansion coefficient, and reliable performance. These features make them suitable for use as critical components in power plant boilers, where safety and reliability are paramount.
