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Steel 20KH2N4A

Steel 06Х1 Steel 06Х1Ф Steel 06ХГР Steel 06ХФ Steel 07Х3ГНМЮА Steel 08ГДНФ (SL-2; 08GDNFL) Steel 08Х2Г2ФА Steel 08ХМФЧА (08ХМФЧ) Steel 08ХМЧА (08ХМЧ) Steel 09ГСФА (09GSF) Steel 09Н2МФБА (09Н2МФБА-A) Steel 09СФА (09СФ) Steel 09ХГ2НАБч Steel 09ХН2МД (АБ2-SH1) Steel 09ХН3МД (АБ3) Steel 09ХН4МД (АБ4) Steel 10G2 (10G2A) Steel 10ГН (10ГНА) Steel 10Х1С2М Steel 10Х2ГНМ (10Х2ГНМА) Steel 10KH2M1 (10Х2М1А) Steel 10Х3ГНМЮА Steel 10ХН3МД (АБ2-ø2) Steel 12Г1Р Steel 12KH2N4A (ЭИ83) Steel 12KH2NVFA (ЭИ712) Steel 12KH2NVFMA (ЭП506; ЭИ712М) Steel 12KH2NM1FA Steel 12KH2NMFA Steel 12ХГН2МФБДАЮ (sun-4) Steel 12ХГНМ Steel 12ХГНМФ Steel 12KHN Steel 12KHN2 Steel 12ХН2А Steel 12ХН2МД (AB1) Steel 12KHN3A Steel 12ХН3МД (АБ2; 12ХН3МДФ) Steel 12ХН4МБД (АБ2Р) Steel 138-2 Steel 13Н2ХА Steel 13Н5А Steel 13Х3НВМ2Ф (ДИ45; VCS-4) Steel 13ХГМРБ Steel 13ХГН2МД Steel 13ХГН2МФД Steel 13ХГСН1МД Steel 13HFA (13ХФ) Steel 14Н2МФД (14Н2МФДА) Steel 14Х2ГМР Steel 14Х2Н3МА Steel 14Х3ГМЮ Steel 14ХГ2САФД Steel 14KHGN Steel 14ХГН2МДАФБ (14ХГНМДАФБ) Steel 14ХГНМДАФБРТ (14ХГНМД) Steel 14ХГСН2МА (ЭП176; ДИ3А) Steel 14ХН3МА Steel 15G (15Г1) Steel 15ГЮТ Steel 15N2M (15НМ) Steel 15Н3МА Steel 15KH Steel 15Х1СМФБ Steel 15Х2ГН2ТА Steel 15Х2ГН2ТРА Steel 15KHA Steel 15ХГН2МАФАч Steel 15KHGN2TA (15ХГНТА) Steel 15KHGNM (15ХГНМА) Steel 15ХМФА (15ХМФ) Steel 15ХН3 Steel 15ХР Steel 15ХСМФБ (ЭП79) Steel 15ХФА (15KHF) Steel 16Г2 Steel 16Х2Н3МФБАЮ (16Х2Н3МФАБ; ВКС7) 16Х3НВФМБ steel (VKS-5; ДИ39) Steel 16ХГ (АЦ16ХГ) Steel 16ХГТА (ЭИ274) Steel 16ХН3МА Steel 16KHSN Steel 17Н3МА Steel 17ХГ Steel 18Г2ХФЮД Steel 18KH2N4VA Steel 18KH2N4MA Steel 18KHG Steel 18ХГН2МФБ Steel 18HGT Steel 18ХН2Т Steel 18ХН3МА Steel 18ХНВА Steel 18ХНМФД (18ХНМФДА) Steel 19KH2NVFA (ЭИ763) Steel 19KH2NMFA Steel 19KHGN Steel 19ХГНМА (19ХГНМ) Steel 19ХГС Steel 20G (20Г1) Steel 20G2 Steel 20Г2АФ (20Г2АФпс) Steel 20Г2Р Steel 20ГЮТ Steel 20N2M (20NM) A 20ft steel (20ФА) Steel 20KH Steel 20Х2МА Steel 20Х2МФА Steel 20KH2N4A Steel 20Х2Н4МФ (20Х2Н4МФА) Steel 20Х3НМФ (20Х3НМФА) Steel 20KHGNM Steel 20ХГНМТ (20ХГНМТА) Steel 20KHGNR Steel 20KHGNTR Steel 20KHGR Steel 20KHGSA Steel 20ХГСР Steel 20KHM Steel 20KHN Steel 20KHN2M (20ХНМ) Steel 20KHN3A Steel 20ХН3МФА (20ХН3МФ) Steel 20KHN4FA Steel 20KHNR Steel 20ХФА (20ХФ) Steel 21Н5А (ЭИ56) Steel 21KH2NVFA Steel 21KH2NMFA Steel 22ХГНМА (22ХГНМ) Steel 22ХНМ Steel 23Г2Д Steel 23KH2NVFA (ЭИ659) Steel 23KH2NMFA Steel 23ХН2М Steel 24Г2 Steel 24Х3МФ (24Х3МФА) Steel 24ХНМ Steel 25G (25Г2) Steel 50G Steel 50Г2 Steel 50S Steel 50KHN Steel 5ХНМ2 Steel 85ГФ Steel АК32 Steel АК33 Steel АК34 Steel АК35 Steel АК36 Steel АК37 Steel АК48 Steel АК49 Steel АК50 Steel 25N Steel 25Н3А Steel 25KH2N4VA Steel 25KH2N4MA Steel 25ХГ2СФР Steel 25KHGM Steel 25ХГНМА (25ХГНМ) Steel 25KHGNMT (25ХГНМТА) Steel 25KHGSA Steel 25KHGT Steel 25ХМ Steel 25ХН3 Steel 25ХНТЦ Steel 26Г1 Steel 26Х1МА (26Х1М) Steel 26Х2НВМБР (KVK-26) Steel 26ХГМ Steel 26ХГМФ (26ХГМФА) Steel 26ХМА (26ХМ; 25ХМ) Steel 27KHGR Steel 30G (30Г1) Steel 30Г1Р Steel 30G2 Steel 30T Steel 30KH Steel 30Х2Н2ВФА Steel 30Х2Н2ВФМА Steel 30Х2НВА Steel 30Х2НВФА Steel 30Х2НВФМА Steel 30Х2НМА Steel 30Х2НМФА (30Х2НМФ) Steel 30KH3MF Steel 30Х3МФСА Steel 30Х3НВА Steel 30KHGS Steel 30KHGSA Steel 30KHGT Steel 30KHM Steel 30KHMA Steel 30KHN2VA Steel 30KHN2VFA Steel 30KHN2MA (30ХНМА) Steel 30KHN2MFA Steel 30KHN3A Steel 30ХН3М Steel 30ХНМФА (30ХНВФА) Steel 30KHRA Steel 30ХСНВФА (ВП30) Steel 32Г2 Steel 32Г2С Steel 32Х2НВМБР (ERC-32) Steel 33Х3СНМВФА (СП33; ЭП613) Steel 33ХН3МА Steel 33KHS Steel 34ХН1ВА (0ХН1В) Steel 34ХН3М Steel 35G Steel 35Г1Р Steel 35G2 Steel 35KH Steel 35Х2ГЮФ Steel 35ХГН2 Steel 35HGSA 35KHM steel Steel 35ХН2Ф Steel 35ХН3МА (35ХН3М) Steel 36G2S Steel 36Г2СР Steel 36KH2N2MFA (36ХН1МФА) Steel 37Г2С Steel 37Х2НВМБР (ERC-37) Steel 37ХН3А Steel 38H2MYUA (38ХМЮА) Steel 38KH2N2VA Steel 38KH2N2MA (38ХНМА) Steel 38Х2Н3М Steel 38Х2НМ Steel 38Х2НМФ Steel 38Х2Ю (38Х2ЮА) Steel 38KHA Steel 38KHGM Steel 38KHGN Steel 38KHGNM Steel 38ХГСА (38ХГС) Steel 38KHM (42ХМ) Steel 38ХМА Steel 38KHN3VA Steel 38KHN3MA Steel 38KHS Steel 38ХФР (40ХФР) Steel 40G Steel 40G2 Steel 40GR (40Г1Р) Steel 40X (40ХА) Steel 40KH2N2VA Steel 40Х2Н2МА Alloy 40Х3М2ФА (USP-40) Steel 40KHGNM Steel 40ХГСМА Steel 40KHGTR Steel 40KHMFA (40ХМФ) Steel 40KHN Steel 40ХН2ВА (40ХНВА) Steel 40KHN2MA (40HNMA) Steel 40ХР Steel 40HS Steel 40ХСН2МА Steel 40KHFA (40ХФ) Steel 42Х2НВМБР (KVK-42) Steel 42Х2НМБР (АБО70Н) Steel 42ХМФА (42ХМФ) Steel 44Х2НМБР (АБО70В) Steel 45G Steel 45G2 Steel 45KH Steel 45KHN Steel 45KHN2MFA (45ХНМФА) Steel 47GT Steel 48ХН3М

Designation

Name The value
Designation GOST Cyrillic 20Х2Н4А
Designation GOST Latin 20X2H4A
Transliteration 20H2N4A
The chemical elements 20Cr2Н4

Description

20KH2N4A steel is used: for the manufacture of gear, shaft-sestina, fingers, solid-rolled rings, case hardening, critical, highly loaded parts, which are requirements of high strength, ductility and toughness of core and high surface hardness, working under shock loads and at low temperatures.

Note

The high quality stainless steel construction.

Standards

Name Code Standards
Sheets and stripes В23 GOST 103-2006
Sectional and shaped rolling В32 GOST 1051-73, GOST 4543-71, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 3-173-83, TU 14-1-1433-75, TU 14-1-1732-76, TU 14-1-1885-85, TU 14-1-2118-77, TU 1-83-77-90, TU 14-11-245-88, TU 14-1-1271-75, TU 14-136-367-2008
Sectional and shaped rolling В22 GOST 1133-71, GOST 8319.0-75, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Bulls. Blanks. Slabs В31 OST 3-1686-90, TU 14-1-4944-90

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo W
TU 14-1-1885-85 0.16-0.22 ≤0.015 ≤0.025 0.3-0.6 1.25-1.65 0.17-0.37 3.25-3.65 The rest ≤0.25 - - - -
GOST 4543-71 0.16-0.22 ≤0.025 ≤0.025 0.3-0.6 1.25-1.65 0.17-0.37 3.25-3.65 The rest ≤0.3 ≤0.05 ≤0.03 ≤0.15 ≤0.2
Fe is the basis.
GOST 4543-71 regulates the content of high-quality steel: P≤0,025%; S≤0.015%; Сu≤0.25%.
According to TU 14-1-1885-85 the chemical composition is given for steel grade 20Х2Н4А-ВД. To ensure the required grain size, it is allowed to introduce vanadium in the steel smelting at the rate of its content in steel no more than 0.10%, the content of which in steel is not determined. The presence of tungsten to 0.20%, molybdenum to 0.15%, titanium to 0.030% is not a defect. The allowable variation in manganese content in steel is ± 0.010%.

Mechanical characteristics

Section, mm t отпуска, °C sT|s0,2, MPa σB, MPa d5, % y, % kJ/m2, кДж/м2 Brinell hardness number, MPa HRC
Quenching in oil from 860 °C + quenching in oil from 780 °C to + vacation at 180 °C, cooling in air or in oil
≤15 - ≥1080 ≥1270 ≥9 ≥45 ≥765 - -
Hardening + Vacation
120-160 - ≥760 ≥880 ≥12 ≥50 - ≥262 -
Quenching in oil from 840 °C to + Vacation
- 200 ≥1360 ≥1500 ≥7 ≥56 - - -
A specimen of 10 mm diameter, 50 mm length, forged and annealed. The rate of deformation of 5 mm/min strain Rate of 0.002 1/s.
- - ≥63 ≥120 ≥56 ≥78 - - -
Rods made of steel 20KH2N4A on the other 14-1-1885-85. Quenching in oil with 850-870 °C + Quenching in oil with 770-790 °C + Vacation at 180 °C, cooling in air or in oil. In the graph KCU KCU values are shown along the fiber/KCU across the grain
Образец 15х15 - ≥1080 ≥1270 ≥9 ≥45 ≥784 363-444 -
Hardening + Vacation
15-30 - ≥820 ≥940 ≥12 ≥50 - ≥277 -
Quenching in oil from 840 °C to + Vacation
- 300 ≥1280 ≥1400 ≥7 ≥60 - - -
A specimen of 10 mm diameter, 50 mm length, forged and annealed. The rate of deformation of 5 mm/min strain Rate of 0.002 1/s.
- - ≥45 ≥56 ≥64 ≥95 - - -
Cementation at 900-920 °C, air cooling + tempering in oil 780-810 °C + vacation at 180-200 °C, air cooling
20-50 - ≥1050 ≥1220 ≥12 ≥45 ≥1158 360 57-64
Hardening + Vacation
160-200 - ≥740 ≥860 ≥12 ≥50 - ≥262 -
Quenching in oil from 840 °C to + Vacation
- 400 ≥1140 ≥1300 ≥7 ≥63 - - -
A specimen of 10 mm diameter, 50 mm length, forged and annealed. The rate of deformation of 5 mm/min strain Rate of 0.002 1/s.
- - ≥36 ≥56 ≥58 ≥100 - - -
Cementation at 920-950 °C + normalization at 900-920 °C, cooling in air or quenching in oil with 880-920 °C + vacation at 630-660 °C, air cooling. Quenching in oil 780-820 °C + vacation at 150-200 °C air cooling
150 - ≥830 ≥1080 ≥9 ≥35 ≥765 321-420 57-64
Hardening + Vacation
200-240 - ≥720 ≥860 ≥12 ≥50 - ≥255 -
Quenching in oil from 840 °C to + Vacation
- 500 ≥970 ≥1170 ≥10 ≥67 - - -
A specimen of 10 mm diameter, 50 mm length, forged and annealed. The rate of deformation of 5 mm/min strain Rate of 0.002 1/s.
- - ≥22 ≥37 ≥63 ≥100 - - -
Hardening + Vacation
30-50 - ≥820 ≥940 ≥12 ≥50 - ≥277 -
Quenching in oil from 840 °C to + Vacation
- 600 ≥790 ≥1000 ≥11 ≥72 - - -
A specimen of 10 mm diameter, 50 mm length, forged and annealed. The rate of deformation of 5 mm/min strain Rate of 0.002 1/s.
- - ≥20 ≥27 ≥59 ≥100 - - -
Hardening + Vacation
50-80 - ≥820 ≥940 ≥12 ≥50 - ≥269 -
A specimen of 10 mm diameter, 50 mm length, forged and annealed. The rate of deformation of 5 mm/min strain Rate of 0.002 1/s.
- - ≥16 ≥26 ≥65 ≥100 - - -
Hardening + Vacation
80-120 - ≥780 ≥900 ≥12 ≥50 - ≥262 -
A specimen of 10 mm diameter, 50 mm length, forged and annealed. The rate of deformation of 5 mm/min strain Rate of 0.002 1/s.
- - ≥16 ≥22 ≥71 ≥100 - - -

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
HRC Rockwell hardness (indenter diamond spheroconical)

Physical characteristics

Temperature Е, ГПа r, кг/м3 l, Вт/(м · °С)
0 203 7850 -
20 203 7850 -
100 - - 24
400 - - 18

Technological properties

Name The value
Weldability difficult weldability. Welding methods: SMAW, ADS submerged arc, electroslag welding. Necessary preheating and subsequent heat treatment.
Propensity to temper brittleness malosana
Forging temperature Start - 1200 °C, the end - of 800 °C. the cross Sections up to 100 mm are cooled in air, 101-350 mm - in the pit.
Flock-sensitive sensitivity sensitive
Workability by cutting After normalization and tempering at HB 259 blower SB=880 MPa Kn TV.SPL.=0.72 Kn b.St.=0.63[100]
Macrostructure and contamination Macrostructure of steel when testing for the breaks in the longitudinal direction and transverse templeto selected from rolled, should not have shrinkage, porosity, bubbles, cracks, delamination, inclusions and placenow and defects of fracture, listed in Annex 3 GOST 10243. The Central porosity, point heterogeneity and phase separation in the square should not exceed 1 points; layer-by-layer crystallization and the bright loop - 3 points reference scales GOST 10243. All other defects under GOST 10243, are not allowed. Pollution steel non-metallic inclusions should be according to the average score is not higher (in points): oxides of point 1,5, 2,0 stroke oxides, silicates fragile 1,0, 1,0 silicates plastic, silicates, non-deformed 2,5, 2,5 sulfides, nitrides stroke and point 1,0.

Structural steel

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