12Cr1MoVG boiler steel pipes are alloy steel pipes with a series of excellent properties to adapt to the complex and harsh operating environment of boilers, as follows:

First, what are the mechanical properties of 12Cr1MoVG boiler steel pipes?
(1) High strength: Its yield strength is not less than 255MPa, and its tensile strength is between 470-640MPa. It can withstand the huge pressure brought by high-pressure steam and hot water in the boiler system, maintain the stability of the pipe shape, and prevent bulging, rupture, etc. due to pressure.
(2) Good toughness: It has good impact toughness, which prevents 12Cr1MoVG boiler steel pipes from brittle fracture when subjected to sudden external impact or water hammer, maintaining the integrity of the pipeline system and ensuring the continuous safe operation of the boiler.

Second, what are the high-temperature properties of 12Cr1MoVG boiler steel pipes?
(1) High-temperature creep resistance: In high-temperature environments, the creep characteristics of materials are crucial. 12Cr1MoVG can withstand high-temperature conditions below 580℃ for extended periods, exhibiting a low creep deformation rate. This effectively resists slow deformation caused by prolonged heating and the slow movement of atoms, ensuring the dimensional accuracy of boiler steel pipes during long-term service.
(2) Oxidation Resistance: As temperature rises, metals are more easily oxidized upon contact with oxygen. The 12Cr1MoVG boiler steel pipe forms a dense protective oxide film at high temperatures, slowing further oxidation of the metal matrix, maintaining the mechanical properties of the 12Cr1MoVG boiler steel pipe, and preventing pipe wall thinning due to surface oxidation and peeling.

Third, Chemical Properties of 12Cr1MoVG Boiler Steel Pipe
(1) Corrosion Resistance: The media transported within boiler steel pipes are complex and may contain trace amounts of acidic and alkaline substances. 12Cr1MoVG possesses a certain degree of resistance to these corrosive media, reducing damage such as pitting and corrosion, and extending pipe life. 
(2) Hydrogen Corrosion Resistance: In high-temperature, steamy environments containing hydrogen, some metals react with hydrogen, causing hydrogen embrittlement and loss of material toughness. This 12Cr1MoVG boiler steel pipe exhibits strong resistance to hydrogen corrosion, enabling safe transport of media in hydrogen-containing environments.

Fourth, Processing Performance of 12Cr1MoVG Boiler Steel Pipe
(1) Welding Performance: By matching appropriate welding processes and electrode types, 12Cr1MoVG boiler steel pipe can achieve high-quality welding. The weld strength and toughness are close to those of the base material, and the heat-affected zone performance is stable, ensuring normal operation of the welded joint under high-temperature and high-pressure environments.
(2) Cold Working Performance: Although it is an alloy steel pipe, it allows for a certain degree of cold working, such as cold bending, facilitating on-site installation and pipeline layout of the boiler. The curvature of the 12Cr1MoVG boiler steel pipe can be adjusted as needed to meet complex installation space requirements.

With these properties, 12Cr1MoVG boiler steel pipe is widely used in key components such as heating surface tubes, headers, and steam pipes in various medium and high-pressure power plant boilers.