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Cryogenic structural steel 07KH21G7AN5 (ЭП222) belongs to the group of austenitic steels for special purposes. In addition to iron, chromium, Nickel, and manganese that form the basis of, the structure includes a number of additional alloying elements that significantly increase the original quality of the material and ensure stability of its performance. Thanks to the optimal technological and operational parameters such material is used for the manufacture of parts, working in conditions of increased aggressiveness and cryogenic temperatures.
The most important qualities of steel 07KH21G7AN5 include corrosion resistance, strength, good accessibility of the welding and soldering. These qualities allow the use of semi-finished products made from such raw materials chemical production in a wide temperature range from -253°C to +400°C. Thanks to the optimal technological and operational parameters such material actively oppose the influence of aggressive environment, providing reliability and durability of operation of complex equipment.
Percentage composition according to GOST 5632−72
Steel is smelted in electric arc furnaces using electroslag remelting and VDP. Manufacture of semi-finished products normalized following GOST: 5949−75, 14955−77, and the following TU: 14−1-1141−74, 14−1-2455−78, 14−1-2476−78, 14−1-3041−80, 14−1-952−74, 14−11−245−88.
Used for products operating in conditions of increased aggressiveness, serves for the manufacture of heat transfer equipment, cryogenic engineering. Can be operated at very low t° -253°C. is Used for welded or soldered constructions of chemical equipment. Used for fixing armature, spindles, flanges, hangers, threaded connections.
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