Steel tube of an actual alloy is made of heat-resisting alloy. In consists of nickel (65,073 — 71,2%), chrome (26−29%), iron (<1%). Aluminium (2,8-3,5%), mangan (0,3%), phosphorus (<0,015%), silicon (1%), carbon, barium (>0,1%), sulphur (0,012%) should be added to charge mixture in the capacity of masteralloys. Finished pipe has an attractive look. It does not need an additional cover.
|5632−72||26 — 29||65.1−71.2||≤1||2.8- 3.5||≤ 0.3||≤1||≤0.015||≤0.1||≤0.1||≤0.03||≤0,012||≤0.07|
Such tube is used in manufacture of heat-resisting details, including gas transmission systems, which work performs at moderate pressure. Such tube is used in details of burner devices. It is also used in a manufacture of electric thermal transducer casings. It does not dirt thermocouple electrodes and gives a reliable protection to thermocouple wire while working in nuisance conditions or aggressive environment. Such tube can withstand a temperature of 1250−1300°C under load for a long time. That is why it is used for details of internal combustion engines, furnaces, steam and gas turbines, jet engines, etc. This tube differs with a resistance in air and in gas environment at high temperatures. Alloyed with aluminium and silicon tubes can withstand contact with aggressive environment. It happens like this because during heating these elements form protective films on a surface (aluminium, chrome oxides). Such tubes are fairly malleable. This allows using them in chimney stack constructions and other tube systems at any angle.
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