The high pressure alloy tube is a seamless steel tube. Its performance is much higher than other seamless steel pipes, because the steel pipe contains a large amount of Cr, its high temperature resistance, low temperature resistance and corrosion resistance cannot reach the rest of the seamless steel pipe, so the alloy pipe is in oil, space and space. . Chemical, electric power, boiler, military and other industries have been widely used.
It is suitable for medium-pressure boilers for long-term use of precision display alloy tubes (working pressure is not more than 5.88 MPa, working temperature is lower than 450 °C), high-pressure boiler tubes, economizers, superheaters, reheaters, petrochemicals and other industries. R (working pressure is generally above 98MPa, working temperature is 450 ~ 650 ° C) pipe and so on.

(5) High-pressure alloy tubes are used for alloy structural steels for public purposes. Steel numbers (or suffixes) are symbols for steel use. Similar to the 30CrMnSi steel used for the rivet screw, the amount of steel is ML30CrMnSi. The relationship between alloy tubes and seamless tubes is different. Alloy tubes are defined as tube compliant materials (made of materials). As the name suggests, alloy tubes can be made of alloys, seamless tubes are defined by the production process (seamlessly seamless), and seamless tubes are seamed tubes, including straight seam welded tubes and spiral tubes. The CR9Mo alloy tube is used for a long time in low and medium pressure boilers (working pressure is not less than 5.88 MPa, working temperature is lower than 450 °C), and high pressure alloy tubes are used for high pressure boiler surface tubes (working pressure is usually above 98 MPa, working temperature). At 450 ~ 650 ° C, economizer, superheater, reheater, petrochemical industrial pipe.

≥245≥20/GB531020G410～550≥245≥24/20MnG≥415≥240≥22/25MnG≥485≥275≥20/15CrMoG440～640≥235≥21/12Cr2MoG450～600.