Steel 07KH21G7AN5 (ЭП222)
Designation
Description
07KH21G7AN5 steel is used: for the manufacture of welded components, spindles, hangers, oxygen, brazed structures, special fasteners, flanges, threaded connections with high svenimento operating at temperatures from +400 °C to -253 °C and in environments of medium aggressiveness; parts and welded assemblies of valves in the heat treated condition.
Note
Steel corrosion resistant.
Unstabilized chromium-Nickel steel of austenitic class.
Steel resistant to marine water.
Standards
Chemical composition
Fe is the basis.
According to TU 14-1-1141-74, the chemical composition is given for steel grade 07Х21Г7АН5 (Х21Г7АН5, ЭП222). According to TU 14-1-952-74, the chemical composition is given for steel grade 07X21G7AN5-SH (X21G7AN5-SH, EP222-SH). According to the technical specification, deviations from the content of elements are allowed: for carbon +0.010%, for chromium ± 0.30%, for manganese + 0.25%, for nitrogen +0.050%. Cerium and calcium are introduced into the steel in an amount not exceeding 0.020% each, which are introduced into the metal by calculation and chemical analysis are not determined.
According to GOST 5632-72, the chemical composition is given for steel grade 07Х21Г7АН5.
According to TU 14-1-2476-78, the chemical composition is given for steel grade 07Х21Г7АН5 (ЭП222), 07Х21Г7АН5-ВД (ЭП222-ВД), 07Х21Г7АН5-Ш (ЭП222-Ш). Cerium and calcium are introduced into the steel in an amount not exceeding 0.020% each, the content of which in the steel is not determined by chemical analysis. Deviations in chemical composition are allowed in the finished product in accordance with GOST 5632.
According to TU 14-1-1141-74, the chemical composition is given for steel grade 07Х21Г7АН5 (Х21Г7АН5, ЭП222). According to TU 14-1-952-74, the chemical composition is given for steel grade 07X21G7AN5-SH (X21G7AN5-SH, EP222-SH). According to the technical specification, deviations from the content of elements are allowed: for carbon +0.010%, for chromium ± 0.30%, for manganese + 0.25%, for nitrogen +0.050%. Cerium and calcium are introduced into the steel in an amount not exceeding 0.020% each, which are introduced into the metal by calculation and chemical analysis are not determined.
According to GOST 5632-72, the chemical composition is given for steel grade 07Х21Г7АН5.
According to TU 14-1-2476-78, the chemical composition is given for steel grade 07Х21Г7АН5 (ЭП222), 07Х21Г7АН5-ВД (ЭП222-ВД), 07Х21Г7АН5-Ш (ЭП222-Ш). Cerium and calcium are introduced into the steel in an amount not exceeding 0.020% each, the content of which in the steel is not determined by chemical analysis. Deviations in chemical composition are allowed in the finished product in accordance with GOST 5632.