Steel 37KH12N8G8MFB (ЭИ481)
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 | 37Х12Н8Г8МФБ |
| Designation GOST Latin | 37X12H8G8MFB |
| Transliteration | 37H12N8G8MFB |
| The chemical elements | 37Cr12Н8Mn8MoVNb |
| Name | The value |
|---|---|
| Designation GOST Cyrillic | ЭИ481 |
| Designation GOST Latin | EI481 |
| Transliteration | EhI481 |
| The chemical elements | - |
Description
37KH12N8G8MFB steel is used: for the manufacture of turbine disks, fasteners and other components; parts operating under high voltage.
Note
Steel complexly alloyed heat-resistant austenitic class.
The recommended maximum operating temperature for a long time +630 °C.
The temperature of beginning of intensive scaling in air +750 °C.
Standards
| Name | Code | Standards |
|---|---|---|
| Sectional and shaped rolling | В32 | GOST 18907-73, TU 14-1-1923-76, TU 14-1-3957-85, TU 14-11-245-88 |
| Classification, nomenclature and general norms | В30 | GOST 5632-72 |
| Bulls. Blanks. Slabs | В21 | OST 1 90176-75 |
| Bulls. Blanks. Slabs | В31 | OST 3-1686-90, OST 1 90162-74, TU 14-1-1213-75, TU 14-1-226-72 |
| Thermal and thermochemical treatment of metals | В04 | STP 26.260.484-2004 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | V | Ti | Mo | Nb |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TU 14-1-1213-75 | 0.35-0.4 | ≤0.015 | ≤0.035 | 7.5-9.5 | 11.5-13.5 | 0.3-0.7 | 7-9 | The rest | ≤0.2 | 1.25-1.55 | ≤0.12 | 1.1-1.4 | 0.35-0.45 |
| TU 14-1-1923-76 | 0.35-0.4 | ≤0.03 | ≤0.035 | 7.5-9.5 | 11.5-13.5 | 0.3-0.7 | 7-9 | The rest | ≤0.2 | 1.25-1.55 | ≤0.12 | 1.1-1.4 | 0.35-0.45 |
| GOST 5632-72 | 0.34-0.4 | ≤0.03 | ≤0.035 | 7.5-9.5 | 11.5-13.5 | 0.3-0.8 | 7-9 | The rest | ≤0.3 | 1.3-1.5 | ≤0.2 | 1.1-1.4 | 0.25-0.45 |
Fe is the basis.
According to TU 14-1-1923-76 the chemical composition is given for steel grades 37Х12Н8Г8МФБ (ЭИ481). In steel 37Х12Н8Г8МФБ-Ш (ЭИ481-Ш) electroslag remelting the sulfur content should not be more than 0,015% with an allowable deviation of + 0,0050%. Deviations in chemical composition are allowed in both grades: niobium + 0.15%, vanadium + 0.10%, carbon + 0.020%, molybdenum -0.020%. The content of copper and titanium is indicated as residual.
According to TU 14-1-1213-75 the chemical composition is given for steel grades 37Х12Н8Г8МФБ-Ш (ЭИ481-Ш). In the finished product, deviations in niobium + 0.15%, vanadium + 0.10%, carbon + 0.020% are allowed. At the consumer's request, a deflection on carbon may not be tolerated. For other elements, deviations are allowed in accordance with GOST 5632. The mass fraction of residual copper should not exceed 0.20%, titanium - 0.12%. The mass determines the mass fraction of nitrogen, the results are recorded in the certificate.
According to TU 14-1-1923-76 the chemical composition is given for steel grades 37Х12Н8Г8МФБ (ЭИ481). In steel 37Х12Н8Г8МФБ-Ш (ЭИ481-Ш) electroslag remelting the sulfur content should not be more than 0,015% with an allowable deviation of + 0,0050%. Deviations in chemical composition are allowed in both grades: niobium + 0.15%, vanadium + 0.10%, carbon + 0.020%, molybdenum -0.020%. The content of copper and titanium is indicated as residual.
According to TU 14-1-1213-75 the chemical composition is given for steel grades 37Х12Н8Г8МФБ-Ш (ЭИ481-Ш). In the finished product, deviations in niobium + 0.15%, vanadium + 0.10%, carbon + 0.020% are allowed. At the consumer's request, a deflection on carbon may not be tolerated. For other elements, deviations are allowed in accordance with GOST 5632. The mass fraction of residual copper should not exceed 0.20%, titanium - 0.12%. The mass determines the mass fraction of nitrogen, the results are recorded in the certificate.
Mechanical characteristics
| Section, mm | sT|s0,2, MPa | σB, MPa | d5, % | y, % | kJ/m2, кДж/м2 | Brinell hardness number, MPa |
|---|---|---|---|---|---|---|
| Rods made of steel 37KH12N8G8MFB (ЭИ481) TU 14-1-1923-76. Quenching with 1140-1160 °C, exposure for 1 h 20 min. (for workpieces up to ø 45 mm) and 1 hour 45 minutes (for workpieces ø 45-90 mm), full cooling in water | ||||||
| ≥590 | ≥880 | ≥15 | ≥20 | ≥294 | 277-311 | |
| Disks. Quenching in water from 1140-1150 °C + Aging at 670 °C (16 h exposure) + Aging at 720 °C (exposure 12 h) At 20 °C NV=354 | ||||||
| - | ≥910 | ≥1100 | ≥10 | ≥32 | - | - |
| Bars with cross-section 90 mm. Quenching in water from 1145 °C (exposure 2.5 h) + Aging at 670 °C (16 h exposure) + Aging at 780 °C (the aging 16 hours) (provided the temperature and duration of heat exposure) | ||||||
| - | 650-760 | 1010 | 19-22 | 30 | - | - |
| Rods made of steel 37KH12N8G8MFB-sh (ЭИ481-W) on the other 14-1-1923-76. Aging at 670 °C, exposure time of 12-14 h, temperature rise up to 770-800 °C, exposure time 10-12 hours, air cooling | ||||||
| ≥590 | ≥880 | ≥18 | ≥22 | ≥294 | 277-311 | |
| Disks. Quenching in water from 1140-1150 °C + Aging at 670 °C (16 h exposure) + Aging at 720 °C (exposure 12 h) At 20 °C NV=354 | ||||||
| - | ≥820 | ≥960 | ≥9 | ≥36 | - | - |
| Bars with cross-section 90 mm. Quenching in water from 1145 °C (exposure 2.5 h) + Aging at 670 °C (16 h exposure) + Aging at 780 °C (the aging 16 hours) (provided the temperature and duration of heat exposure) | ||||||
| - | 490-540 | 560 | 10-19 | 31-47 | - | - |
| Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water from 1130-1150 °C to + First aging at 660-680 °C, exposure for 12 to 14 h, air cooling + ageing at the Second 770-800 °C, exposure time 10-12 h, air cooling | ||||||
| ≥600 | ≥900 | ≥15 | ≥20 | - | - | |
| Disks. Quenching in water from 1140-1150 °C + Aging at 670 °C (16 h exposure) + Aging at 720 °C (exposure 12 h) At 20 °C NV=354 | ||||||
| - | ≥810 | ≥930 | ≥8 | ≥31 | - | - |
| Bars with cross-section 90 mm. Quenching in water from 1145 °C (exposure 2.5 h) + Aging at 670 °C (16 h exposure) + Aging at 780 °C (the aging 16 hours) (provided the temperature and duration of heat exposure) | ||||||
| - | 660-700 | 980 | 19-22 | 28 | - | - |
| Rolled steel. Heating 1140-1160 °C (aging for 1 h), cooling in water + Aging at 660-790 °C (aging 10-16 h), air cooling | ||||||
| ≤60 | ≥600 | ≥1000 | ≥20 | ≥25 | ≥343 | - |
| Disks. Quenching in water from 1140-1150 °C + Aging at 670 °C (16 h exposure) + Aging at 720 °C (exposure 12 h) At 20 °C NV=354 | ||||||
| - | ≥780 | ≥900 | ≥9 | ≥24 | - | - |
| Bars with cross-section 90 mm. Quenching in water from 1145 °C (exposure 2.5 h) + Aging at 670 °C (16 h exposure) + Aging at 780 °C (the aging 16 hours) (provided the temperature and duration of heat exposure) | ||||||
| - | 495 | 570 | 15-18 | 38-45 | - | - |
| Forming at OST 1 90176-75. Quenching in water from 1140-1160 °C (extract 1,75-2,50 h), complete cooling in water + Aging at 670 °C (16 h exposure) + Heating to 770-790 °C (aging from 16 to 20 h), air cooling | ||||||
| ≥589 | ≥883 | ≥15 | ≥20 | ≥245 | 277-311 | |
| Disks. Quenching in water from 1140-1150 °C + Aging at 670 °C (16 h exposure) + Aging at 720 °C (exposure 12 h) At 20 °C NV=354 | ||||||
| - | ≥710 | ≥830 | ≥9 | ≥30 | - | - |
| Bars with cross-section 90 mm. Quenching in water from 1145 °C (exposure 2.5 h) + Aging at 670 °C (16 h exposure) + Aging at 780 °C (the aging 16 hours) (provided the temperature and duration of heat exposure) | ||||||
| - | 500 | 880 | 25 | 30 | - | - |
| Forming at OST 1 90176-75. Quenching in water from 1140-1160 °C (extract 1,75-2,50 h), complete cooling in water + Aging at 670 °C (16 h exposure) + Heating to 770-790 °C (aging from 16 to 20 h), air cooling | ||||||
| ≥589 | ≥912 | ≥18 | ≥22 | ≥294 | 277-311 | |
| Disks. Quenching in water from 1140-1150 °C + Aging at 670 °C (16 h exposure) + Aging at 720 °C (exposure 12 h) At 20 °C NV=354 | ||||||
| - | ≥650 | ≥710 | ≥6 | ≥28 | - | - |
| Bars with cross-section 90 mm. Quenching in water from 1145 °C (exposure 2.5 h) + Aging at 670 °C (16 h exposure) + Aging at 780 °C (the aging 16 hours) (provided the temperature and duration of heat exposure) | ||||||
| - | 390 | 510 | 13 | 42 | - | - |
| Disks. Quenching in water from 1140-1150 °C + Aging at 670 °C (16 h exposure) + Aging at 720 °C (exposure 12 h) At 20 °C NV=354 | ||||||
| - | ≥630 | ≥710 | ≥5 | ≥18 | - | - |
| Bars with cross-section 90 mm. Quenching in water from 1145 °C (exposure 2.5 h) + Aging at 670 °C (16 h exposure) + Aging at 780 °C (the aging 16 hours) (provided the temperature and duration of heat exposure) | ||||||
| - | 450 | 810 | 24-29 | 30 | - | - |
| A sample with a diameter of 10 mm and a length of 50 mm, laminated and annealed. The rate of deformation of 20 mm/min strain Rate 0,007 1/C | ||||||
| - | ≥245 | ≥350 | ≥12 | ≥22 | - | - |
| Bars with cross-section 90 mm. Quenching in water from 1145 °C (exposure 2.5 h) + Aging at 670 °C (16 h exposure) + Aging at 780 °C (the aging 16 hours) (provided the temperature and duration of heat exposure) | ||||||
| - | 280 | 440-470 | 16-20 | 43 | - | - |
| A sample with a diameter of 10 mm and a length of 50 mm, laminated and annealed. The rate of deformation of 20 mm/min strain Rate 0,007 1/C | ||||||
| - | ≥165 | ≥180 | ≥22 | ≥59 | - | - |
| - | ≥83 | ≥92 | ≥38 | ≥78 | - | - |
| - | ≥47 | ≥49 | ≥45 | ≥88 | - | - |
| - | ≥24 | ≥26 | ≥51 | ≥79 | - | - |
| - | ≥20 | ≥21 | ≥21 | ≥41 | - | - |
| Bars section 20-90 mm. Quenching in water from 1140 °C (exposure for 1.5-2.5 h) + Aging at 670 °C (delay of 12-16 h) + Aging 780 °C (delay of 12-16 h). At 20 °C NV=275-302 | ||||||
| - | 590-780 | 920-1060 | 16-24 | 24-43 | - | - |
| - | 540 | 750 | 15 | 37 | - | - |
| - | 520 | 730 | 12 | 36 | - | - |
| - | 490 | 710 | 15 | 36 | - | - |
| - | 480-570 | 670-750 | 13-17 | 32-42 | - | - |
| - | 450-560 | 590-690 | 10-16 | 36-44 | - | - |
| - | 420-530 | 550-630 | 11-19 | 34-45 | - | - |
| - | 370-520 | 490-580 | 10-18 | 23-39 | - | - |
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) | R, НОм · м | a, 10-6 1/°С |
|---|---|---|---|---|---|
| 0 | 171 | 7850 | - | 740 | - |
| 20 | 174 | 7850 | - | 740 | - |
| 200 | 157 | - | 18 | 900 | 171 |
| 300 | 147 | - | 20 | 950 | 158 |
| 400 | 140 | - | 21 | 1010 | 192 |
| 500 | 133 | - | 23 | 1100 | 203 |
| 600 | 125 | - | 25 | 1150 | 212 |
| 700 | 115 | - | 26 | 1200 | 222 |
| 100 | - | - | 17 | 850 | 159 |
| 800 | - | - | 27 | - | 232 |
| 900 | - | - | 29 | - | 242 |
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 | limited weldability. Welding methods: SMAW (electrodes DH-10), ESW. Recommended subsequent heat treatment. |
| Forging temperature | Beginning - 1220 °C, the end of - 900 °C. the cross Sections up to 350 mm cooled in air. |
| Workability by cutting | In the heat treated condition while HB 269 Kn TV.SPL.=0.4 Kn b.St.=0.2 |
| Features of heat treatment | Steel products 37KH12N8G8MFB for equipment chemical industry should termoobrabotki regime - hardening with 1130-1150 °C water + aging at first 660-680 °C with an exposure 12-14 hours, and air cooling + ageing at the second 770-800 °C with a delay of 10-12 hours and air cooling. |
