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Steel 15KH12VNMF (ЭИ802)

Steel 1Х14Н14В2М (ЭИ257) Steel 13Х15Н4АМ3 (EP310; VNS-5) Steel 15X11MF (1X11MF) Steel 15Х12ВНМФ (ЭИ802) Steel 15Х12Н2МВФАБ (EP517) Steel 15Х16К5Н2МВФАБ (EP866; VNS-30) Steel 16Х11Н2В2МФ (ЭИ962А) Steel 16Х12ВМСФ5Р Steel 16X12MVSFBR (EP823) 18X11MNFB steel (EP291) Steel 18Х12ВМБФР (ЭИ993) Steel 18Х14Н4АМ3 (VNS-43) 18Kh15N3M steel (DI1) Steel 13Х11Н2В2МФ (ЭИ961; ВНС-33) Steel 20X12VNMF (EP428; 20X12VNMF-S (EP427-S)) Steel 25Х13Н2ВМФ (EP65; 2Х13НВМФ) Steel 25Х18Н10В2 (EP610) Steel 25Х18Н8В2 (ЭИ946) Steel 31Х19Н9МВБТ (ЭИ572) Steel 37Х12Н8Г8МФБ (ЭИ481) Steel 40Х15Н7Г7Ф2МС (ЭИ388) Steel 42Х11М3Ф (EP890) Steel 45Х14Н14В2М (ЭИ69) Steel 45Х14Н14СВ2М (ЭИ240) Steel X12H20T2P (EI696A) X14H8M2 steel (EP509) Cr18N13C2AMVF5P steel Steel 09Х14Н19В2БР1 (ЭИ726) Steel 01X19Yu3Bch (EP904; 02X18Yu3B) Steel 04Х15Н11С3МТ Steel 06X14H5MF Steel 06Х16Н15М3Б (ЭИ847; 06Х16Н15М3Б) 06X16H15M3K steel Steel 07Х25Н16АГЦ (EP781) Steel 08X14MF Steel 08Х15Н24В4ТР (EP164) Steel 08Х15Н25М3ТЮБ Steel 08Х15Н5Д2Т (EP410; VNS-2; EP225) Steel 08Х16Н13М2Б (ЭИ680) Steel 09X14H16B (EI694) Steel 09X14H19V2BR (EI695R) Steel 13Х14Н3В2ФР (ЭИ736; 513Л) Steel 09Х16Н13М3 (ЭИ592) Steel 09Х16Н15М3Б Steel 09Х16Н16МВ2БР (ЭП184; Х16Н16МВ2БР) Steel 09Х16Н7М2Ю (ЗИ65) 10GN2MFA steel Steel 10Х11Н20Т3Р (ЭИ696) Steel 10Х11Н23Т3МР (ЭП33; ЭЦ696) Steel 10Х12Н22Т3МРУ (EP33U) Steel 10Х15Н28В2М4Б (EP485) Steel 10Х15Н9С3Б1 (EP302) 10Х9НСМФБ steel Steel 11Х11Н2В2МФ (ЭИ962)

Designation

Name The value
Designation GOST Cyrillic 15Х12ВНМФ
Designation GOST Latin 15X12BHMF
Transliteration 15H12VNMF
The chemical elements 15Cr12WНMoV
Name The value
Designation GOST Cyrillic ЭИ802
Designation GOST Latin EI802
Transliteration EhI802
The chemical elements -

Description

15KH12VNMF steel is used: for the manufacture of steam turbine blades operating at temperatures up to +580 °C; rotors, disks, blades, bolts, bands, nuts, pins and other parts operating at temperatures up to +780 °C.

Note

Steel high-temperature martensite-ferritic class.
The recommended maximum operating temperature for a long time — up to 780 °C. the Temperature of beginning of intensive scaling in air +950 °C.

Standards

Name Code Standards
Sheets and stripes В23 GOST 103-2006
Sectional and shaped rolling В22 GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Sheets and stripes В33 GOST 4405-75
Classification, nomenclature and general norms В30 GOST 5632-72
Sectional and shaped rolling В32 GOST 5949-75, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, GOST 18968-73, GOST 19442-74, TU 14-11-245-88
Bulls. Blanks. Slabs В31 OST 108.020.03-82, OST 3-1686-90

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo W
GOST 5632-72 0.12-0.18 ≤0.025 ≤0.03 0.5-0.9 11-13 ≤0.4 0.4-0.8 The rest ≤0.3 0.15-0.3 ≤0.2 0.5-0.7 0.7-1.1
Fe is the basis.

Mechanical characteristics

Section, mm sT|s0,2, MPa σB, MPa d5, % y, % kJ/m2, кДж/м2 Brinell hardness number, MPa
Bars and strip hot rolled and forged GOST 18968-73. Normalization or quenching at 1010-1060 °C, cooling in oil + Leave in 660-770 °C, air cooling
590-735 ≥740 ≥15 ≥50 ≥588 229-269
Disc diameter 750-1020 mm, height 300 mm. Forging rotor diameter 1140 mm. Quenching in oil from 1050 °C to + Vacation at 720 °C (sample tangential). At 20 °C NV=228-248
- 600-650 750-810 14-23 41-55 - -
Disk with a diameter of 700 mm, a height of 300 mm (indicated temperature and time of heat exposure)
- ≥600 ≥790 ≥21 ≥57 - ≥241
Bars hot rolled and forged according to GOST 5949-75. Annealing at 900-950 °C, cooling in furnace + Quenching in oil from 1000-1020 °C + Vacation at 600-700 °C, air cooling
≥590 ≥740 ≥15 ≥45 ≥588 -
Disc diameter 750-1020 mm, height 300 mm. Forging rotor diameter 1140 mm. Quenching in oil from 1050 °C to + Vacation at 720 °C (sample tangential). At 20 °C NV=228-248
- 580-610 720-760 16-18 45-53 - -
Disk with a diameter of 700 mm, a height of 300 mm (indicated temperature and time of heat exposure)
- ≥580 ≥750 ≥21 ≥49 - ≥241
Rolled steel. Quenching in oil from 1050 °C + Vacation at 740 °C, air cooling
≤60 ≥510 ≥690 ≥18 ≥57 ≥686 -
Disc diameter 750-1020 mm, height 300 mm. Forging rotor diameter 1140 mm. Quenching in oil from 1050 °C to + Vacation at 720 °C (sample tangential). At 20 °C NV=228-248
- 540-570 690-710 13-17 37-54 - -
The forging of a rotor with a diameter of 1000 mm (provided the temperature and time of heat exposure)
- ≥660 ≥810 ≥17 ≥44 - ≥262
Contoured rods (g/K, x/K and x/t for steam turbine blades; x/a and x/t for coupling blades of steam turbines) according to GOST 19442-74. Quenching in oil with 1010-1060 °C to + Leave in 660-770 °C, air cooling (specified strength)
588-735 735-931 ≥15 ≥50 ≥588 229-269
Disc diameter 750-1020 mm, height 300 mm. Forging rotor diameter 1140 mm. Quenching in oil from 1050 °C to + Vacation at 720 °C (sample tangential). At 20 °C NV=228-248
- 520-540 640-680 13-17 46-51 - -
The forging of a rotor with a diameter of 1000 mm (provided the temperature and time of heat exposure)
- ≥630 ≥780 ≥14 ≥42 - ≥255
Disc diameter 750-1020 mm, height 300 mm. Forging rotor diameter 1140 mm. Quenching in oil from 1050 °C to + Vacation at 720 °C (sample tangential). At 20 °C NV=228-248
- 500-510 610-630 - 45-51 - -
The forging of a rotor with a diameter of 1000 mm (provided the temperature and time of heat exposure)
- ≥480 ≥660 ≥21 ≥40 - ≥207
Disc diameter 750-1020 mm, height 300 mm. Forging rotor diameter 1140 mm. Quenching in oil from 1050 °C to + Vacation at 720 °C (sample tangential). At 20 °C NV=228-248
- 440-460 510-530 15-19 52-61 - -
The forging of a rotor with a diameter of 1000 mm (provided the temperature and time of heat exposure)
- ≥440 ≥630 ≥26 ≥51 - ≥196
Disc diameter 750-1020 mm, height 300 mm. Forging rotor diameter 1140 mm. Quenching in oil from 1050 °C to + Vacation at 720 °C (sample tangential). At 20 °C NV=228-248
- 330-350 340-360 21-31 83-85 - -
Bars with a diameter of 40-120 mm. Quenching in oil from 1050 °C to + Vacation at 700 °C. At 20 °C NV=255-271
- 700-730 830-870 15-18 55-59 - -
- 600-620 720-730 14-15 59-63 - -
- 570-590 670-680 13-14 55-62 - -
- 520-570 550-570 14-15 59-78 - -
- 455-470 500-520 18-19 78-79 - -
- 350-370 370-395 20-23 79-88 - -
- 275-315 295-340 26 87 - -

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

Physical characteristics

Temperature Е, ГПа r, кг/м3 l, Вт/(м · °С) a, 10-6 1/°С С, Дж/(кг · °С)
0 212 7850 - - -
20 216 7850 - - -
100 207 7830 25 105 477
200 202 7800 25 108 498
300 196 7780 26 111 545
400 190 7760 26 114 625
500 181 7730 27 116 741
600 167 7700 27 118 896
700 - 7670 272 119 -
800 - - 276 12 -
1000 - - - 107 -
1200 - - - 116 -

A description of the physical symbols

Name Description
Е The normal elasticity modulus
r Density
l Coefficient of thermal conductivity
R UD. the resistivity

Technological properties

Name The value
Weldability difficult weldability. For welding use electrode KTN-10, to welding full heat treatment after welding - vacation at 700 °C for 5 h or at 680 °C for 10 h, cooling with the furnace.
Forging temperature Start - 1230 °C, the end of - 900 °C. the cross Sections up to 250 mm is subjected to annealing, one hypothermia. Sections from 250 to 400 mm - annealing and two hypothermia.
Workability by cutting when HB 230 Kn TV.SPL.=1.1 Kn b.St.=0.5.

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