15CrMoG alloy pipe

15CrMoG is a type of alloy Steel Pipe that is commonly used in high-temperature and high-pressure applications.

15CrMoG steel tubes are also used in:

• Hydraulic props
• High-pressure gas cylinders
• Chemical fertilizer plants
• Petroleum cracking

15CrMoG is GB 5310-95 steel grade (equivalent to 13CrMo44 of Federal Germany; corresponding to 1Cr-1 / 2Mo and 1 1 / 4cr-1 / 2mo-si steel widely used in various countries in the world). Its chromium content is higher than 12CrMo steel, so it has higher thermal strength at 500-550 ℃. When the temperature is higher than 550 ℃, the thermal strength of 15CrMoG steel is significantly reduced. When it runs at 500-550ec for a long time, it does not produce graphitization, but it will produce carbide spheroidization and redistribution of alloy elements, which all lead to the decrease of the thermal strength of steel. 15CrMoG steel has good relaxation resistance at 450 ℃. Its pipe making and welding process performance is good.

What is 15CrMo material?

15CrMoG alloy pipe is a seamless steel tube, its performance is much higher than the general Seamless Steel Pipe, because the inside of this tube contains CR more, its alloy steel tube high temperature, low-temperature, corrosion resistance of other seamless steel tubes, so the alloy tube in the petroleum, chemical, electric power, boiler and other industries are more widely used.

The range of 15CrMoG alloy pipe sizes that may be examined by each method shall be subjected to the limitations in the scope of the respective practice.

For high-pressure boiler (working pressure 9.8MPa or more generally, the working temperature between 450℃-650℃) of heating surface tubes, header, economizer, superheater, reheater and so on.

The range of 12Cr1MoVG pipe sizes that may be examined by each method shall be subjected to the limitations in the scope of the respective practice.

15CrMoG alloy pipe is widely used in industries such as power generation, petrochemical, and boiler manufacturing, where it is used for superheaters, reheaters, steam pipes, and other components that operate at elevated temperatures and pressures. Its excellent mechanical properties, high-temperature strength, and resistance to creep make it suitable for demanding environments where resistance to corrosion, oxidation, and high-temperature stress is required.

What is 15CrMoG Alloy Pipe?

15CrMoG alloy pipe is a type of high-temperature and high-pressure steel pipe known for its exceptional strength, toughness, and resistance to corrosion and oxidation. It belongs to the family of alloy steels, which are specially designed to withstand challenging environments and demanding industrial applications. The "15CrMoG" designation refers to its chemical composition, with 15% chromium and molybdenum being the main alloying elements.

Composition and Material Properties

The chemical composition of 15CrMoG alloy pipe plays a crucial role in its mechanical properties and performance. The presence of 15% chromium and molybdenum imparts excellent high-temperature strength and creep resistance. Additionally, the alloy contains carbon, manganese, silicon, and small amounts of other elements, contributing to its overall properties.

The chemical composition of 15CrMoG alloy steel is as follows:

- Carbon (C): 0.12 - 0.18%
- Silicon (Si): 0.17 - 0.37%
- Manganese (Mn): 0.40 - 0.70%
- Phosphorus (P): ≤ 0.025%
- Sulfur (S): ≤ 0.025%
- Nickel (Ni): ≤ 0.030%
- Copper (Cu): ≤ 0.020%
- Chromium (Cr): 0.80 - 1.10%
- Molybdenum (Mo): 0.45 - 0.55%

The mechanical properties of 15CrMoG alloy pipe are impressive, making it suitable for use in extreme conditions. It exhibits high tensile strength, superior toughness, and exceptional resistance to deformation under high pressures and temperatures.

The mechanical properties of 15CrMoG alloy steel are as follows:

• Yield Strength (Tensile Strength): ≥ 440 MPa
• Tensile Strength: ≥ 590 MPa
• Elongation: ≥ 20%
• Impact Toughness (Impact Energy): ≥ 45 J (20°C)

Manufacturing Process of 15CrMoG Alloy Pipe

The manufacturing process of 15CrMoG alloy pipe involves precision engineering and advanced techniques to ensure its quality and reliability. The production starts with the selection of high-quality raw materials, followed by melting and refining processes to achieve the desired chemical composition. Subsequently, the pipe undergoes hot rolling, cold drawing, and heat treatment to attain the desired mechanical properties.

Applications of 15CrMoG Alloy Pipe

The 15CrMoG alloy steel, due to its excellent comprehensive properties, is widely used in various industries, including:

1. Petroleum Industry: Used in the manufacturing of high-temperature and high-pressure equipment such as heating furnace tubes and hydrocracking tubes.

2. Chemical Industry: Applicable in the production of high-pressure equipment and pipelines for processes like high-sulfur petroleum, residuum hydrogenation, and synthetic ammonia.

3. Power Industry: Employed in the fabrication of high-temperature and high-pressure steam pipes, turbine blades, boilers, and other equipment.

The production standards for 15CrMoG alloy steel include GB/T 3077-2015 "Alloy Structure Steel" and ASME SA335/SA335, which strictly specify requirements for chemical composition, mechanical properties, metallographic structure, surface quality, etc., ensuring the quality and reliability of the material. Additionally, various testing methods, including non-destructive testing and physical and chemical testing, are employed to ensure that the product meets the required quality standards.

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