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Steel 07KH21G7AN5 (ЭП222)

Steel 10Х18Н5Г9АС4 (EP492; VNS-3) Steel 10Х32Н4Д (EP529) Steel 10Х17Н5М2 (EP405) Steel 10Х17Н13М3Т (ЭИ432) Steel 10Х17Н13М2Т (ЭИ448) Steel 10Х14Г14Н3 (DI-6) Steel 10Х14АГ15 (DI-13) Steel 09Cr17N7Yu1 (0Cr17N7Yu1) Steel 09Х17Н7Ю (ЭИ973) Steel 09Х16Н4Б (EP56; 1Х16Н4Б) Steel 09Х15Н8Ю1 (09Х15Н8Ю; ЭИ904) Steel 08ХГСДП Steel 08Х22Н6Т (EP53) Steel 08Х21Г11А6 (VNS-53) Steel 08Х20Н4АГ10 (НН-3) Steel 08X18Th (DI-77) Steel 08Х18Н7Г10АМ3 (08Х18Н7Г10АМ3С2) Steel 08Cr18Ni5G12AB (HH-3B) Steel 08X18H5G11BAF (HH-3BF) Steel 08X18H4G11AF (HH-3F) Steel 08Cr18Ni12T (0Cr18Ni12T) Steel 08X18H12B (EI402) Steel 08Х18Г8Н2Т (KO-3) Steel 08Cr17Ni6T (DI-21) Steel 20Х13Н4Г9 (ЭИ100) Cr17N14M3T steel Cr17N14M2T steel Steel 95X18 (EI229) Steel 95X13M3K3B2F (EP766) Steel 65X13 Steel 40X13 (4X13) Steel 30X13 (3X13) Steel 26Х14Н2 (EP208) Steel 25X17H2B Steel 25X17H2 (EP407) Steel 25Х13Н2 (ЭИ474) Steel 20X17H2 (2X17H2) Steel 08Х17Н15М3Т (ЭИ580) 18X13H3 steel Steel 15Х18Н12С4ТЮ (ЭИ654; 2Х18Н12С4ТЮ) Steel 15Х17АГ14 (ЭП213) Steel 13Х18Н10Г3С2М2 (ЗИ98) Steel 12Х21Н5Т (ЭИ811; 1Х21Н5Т) Steel 12Х18Н13АМ3 (EP878) Steel 12X18H10E (EP47) Steel 12Х17Н8Г2С2МФ (ЗИ126) Steel 12X17G9AN4 (EI878) Steel 12Х13Г12АС2Н2 (DI50) Steel 11Х13Н3 Steel 03Х16Н15М3 (ЭИ844) 04X15ST steel Steel 04X17H10M2 Steel 03Х23Н6 (ЗИ68) Steel 03Х22Н6М2 (ЗИ67) Steel 03Х21Н25М5ДБ Steel 03Х21Н21М4ГБ (ЗИ35) Steel 03Х20Н45М5Б (ChS32; 03ХН45МБ) Steel 03Х18Н12Т (000Х18Н12Т) Steel 03Х18Н12 (000Х18Н12) Steel 03X18N11 (000X18N11) Steel 03Х17Н14М2 Steel 03X17AN9 (EK177) 04X17T steel Steel 03Х15Н35Г7М6Б (EP855) Steel 03X13AG19 (ChS36) Steel 03Х12Н10МТР (EP810; VNS-25) Steel 03Х12К10М6Н4Т (EP927) Steel 03Х11Н10М2Т2 (EP853) Steel 02Х25Н22АМ2 (ChS108) Steel 02Х21Н25М5ДБ (EC5) Steel 02Х21Н21М4Г2Б (ЗИ69) 02Cr18Ni11 steel Steel 02X17H14M3 Steel 015Х16Н15М3 Steel 06Х14Н6Д2МБТ (EP817) Steel 08Х17Н13М2Т (0Х17Н13М2Т; ЭИ448) Steel 08Х10Н20Т2 (0Х10Н20Т2) Steel 08Х10Н16Т2 (0Х10Н16Т2) Steel 07X21G7AN5 (EP222) Steel 07X18N10P (EP287) Steel 07Х16Н6 (EP288; СН-2А; Х16Н6) Steel 07Х16Н4Б Steel 07Х15Н7М2 (EP35; СН-4; Х15Н8М2Ю) Steel 07Х16Н6 Steel 06X18H11 (EI684) 06X15H4DM steel Steel 08Х17Н5М3 (ЭИ925) 06X13H4DM steel Steel 06Х12Н3Д Steel 06Х12Н3Д (08Х12Н3Д) 05KhGB steel Steel 05Х20Н15АГ6 (ChS109) Steel 05Х12Н9М2С3 (EP821) Steel 05Х12Н2К3М2АФ (VNS-40) Steel 04Х32Н8 (EP535) Steel 04Х25Н5М2 (DI62) Steel 04X19MAFT Steel 04X18H10 (EI842)

Designation

Name The value
Designation GOST Cyrillic 07Х21Г7АН5
Designation GOST Latin 07X21G7AH5
Transliteration 07H21G7AN5
The chemical elements 07Cr21Mn7NН5
Name The value
Designation GOST Cyrillic ЭП222
Designation GOST Latin EP222
Transliteration EhP222
The chemical elements -

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

Name Code Standards
Classification, nomenclature and general norms В30 GOST 5632-72
Sectional and shaped rolling В32 GOST 5949-75, GOST 14955-77, TU 14-1-1141-74, TU 14-1-952-74, TU 14-11-245-88
Bulls. Blanks. Slabs В31 OST 3-1686-90
Thermal and thermochemical treatment of metals В04 STP 26.260.484-2004, ST ЦКБА 016-2005
Metal forming. Forgings В03 TU 14-1-1530-75, ST ЦКБА 010-2004
Sheets and stripes В33 TU 14-1-2455-78, TU 14-1-2476-78

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu N V Ti Mo Ca W Ce
TU 14-1-1141-74 ≤0.07 ≤0.03 ≤0.03 6-7.5 19.5-21 ≤0.7 5-6 The rest ≤0.3 0.15-0.25 ≤0.2 - ≤0.2 - ≤0.2 -
GOST 5632-72 ≤0.07 ≤0.03 ≤0.03 6-7.5 19.5-21 ≤0.7 5-6 The rest ≤0.3 0.15-0.25 ≤0.2 ≤0.2 ≤0.3 - ≤0.2 -
TU 14-1-952-74 ≤0.07 ≤0.015 ≤0.03 6-7.5 19.5-21 ≤0.7 5-6 The rest ≤0.3 0.15-0.25 ≤0.2 - ≤0.2 - ≤0.2 -
TU 14-1-2476-78 ≤0.07 ≤0.03 ≤0.03 6-7.5 19.5-21 ≤0.7 5-6 The rest ≤0.3 0.15-0.25 ≤0.2 ≤0.2 ≤0.3 ≤0.02 ≤0.2 ≤0.02
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.

Mechanical characteristics

Section, mm sT|s0,2, MPa σB, MPa d5, % y, % kJ/m2, кДж/м2 Brinell hardness number, MPa
Hot rolled and forged products with a diameter of 10-180 mm of steel grade 07KH21G7AN5 on the other 14-1-1141-74. Annealing in air or in water with 1000-1050 °C
≥365 ≥690 ≥40 ≥50 ≥1270 -
Hot rolled and forged products with a diameter of 10-180 mm of steel grade 07KH21G7AN5-W on the other 14-1-952-74. Annealing in air or in water with 1000-1050 °C
≥333 ≥657 ≥40 ≥50 ≥1280 -
Blank pieces of pipe fittings according to ST CKBA 016-2005. Quenching in water or air 1000-1050 °C (aging of 1.0 to 1.5 min/mm of maximum cross section but not less than 0.5 h)
≤60 ≥363 ≥686 ≥40 ≥50 ≥1275 ≤207
≤60 ≥333 ≥657 ≥40 ≥50 ≥1275 ≤207
Cold-rolled sheet (0.7 to 5.0 mm) and hot-rolled steel (3,0-6,0 mm) made of steel 07KH21G7AN5 in the delivery condition on the other 14-1-2476-78. Quenching in water or air with 1020-1050 NN the fire °C
- ≥392 ≥735 ≥25 - - -
Bars hot rolled and forged according to GOST 5949-75. Annealing in air or in water with 1000-1050 °C
≥365 ≥690 ≥40 ≥50 ≥1274 -
Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water or air from 1050-1100 °C
≥400 ≥700 ≥25 - - -

Description mechanical marks

Name Description
Section Section
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σB Limit short-term strength
d5 Elongation after rupture
y The relative narrowing
kJ/m2 Toughness

Technological properties

Name The value
Weldability To improve the toughness of welded joints at the operating temperature, if the product operates at cryogenic temperatures used for tempering the air from 950-1050 °C (aged for at least 2.5 minutes/mm of maximum wall thickness, but not less than 1 hour).
Macrostructure and contamination On the other 14-1-952-74 macrostructure of steel when tested for transverse slacked templeto without the use of magnifying devices should not have bubbles, captivity, cracks, fistulas, inclusions, podsadecki segregation and exudation of the square. Defects in the macrostructure should not exceed the Central porosity score of 1.0; for a point heterogeneity, a score of 2.0; layer-by-layer crystallization - score of 3.0; bright, contour score of 3.0. Pollution steel non-metallic inclusions shall not exceed: - silicates fragile (CX) - score of 1.0; silicates plastic (SP) - score of 1.0; - the non-deformable silicates (SN) is a score of 2.0; the sulphides (A) - score of 1.0; - stroke nitrides (NA) - score of 2.0; the nitrides of the point (NT) - score of 2.0; - oxides of stroke (OS) - score of 2.0; the point oxides (FROM) - score of 2.0. Quality control of metal-to-foloowing is the consumer in accordance with the requirements of TU 14-1-336-72. On the other 14-1-1141-74 macrostructure of steel when tested for transverse slacked templeto without the use of magnifying devices should not have traces of shrinkage, bubbles, captivity, cracks, fistulas, slag inclusions. On microtemplate presence of defects, if the value does not exceed the standards shown in table 3 according to the scales GOST 10243. Defects in the macrostructure should not exceed the Central porosity score of 1.0; for a point heterogeneity, a score of 1.0; in the exudation of the square - a score of 1.0; for podsadecki segregation - score of 1.0. Increased or reduced travelmasti of the axial zone is not a rejection symptom.
Features of heat treatment Steel used for products, not subjected to welding is designed to work in environments do not cause intergranular corrosion. To increase the resistance against General corrosion and eliminate the tendency to intergranular corrosion and to improve the ductility of the workpiece material is subjected to annealing regime: heating to 1050-1100 °C, cooling in water. The holding time at the heating for hardening to products with a wall thickness up to 10 mm - 30 min, over 10 mm - 20 min + 1 min per 1 mm maximum thickness.

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