Steel 25Х18Н8В2 (ЭИ946)
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 | 25Х18Н8В2 |
| Designation GOST Latin | 25X18H8B2 |
| Transliteration | 25H18N8V2 |
| The chemical elements | 25Cr18Н8W2 |
| Name | The value |
|---|---|
| Designation GOST Cyrillic | ЭИ946 |
| Designation GOST Latin | EI946 |
| Transliteration | EhI946 |
| The chemical elements | - |
Description
25Х18Н8В2 steel is used: for the manufacture of nitride precision parts operating at temperatures up to +600 °C (continuous) and +650 °C (short-term).
Note
Steel 25Х18Н8В2 more technologically advanced than steel 4Х14Н14В2М: 25−40 hours of nitriding a layer with a depth of 0.12…0.25 mm.
Standards
| Name | Code | Standards |
|---|---|---|
| Sectional and shaped rolling | В32 | TU 14-1-204-72 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | W |
|---|---|---|---|---|---|---|---|---|---|
| TU 14-1-204-72 | 0.21-0.28 | ≤0.03 | ≤0.03 | ≤0.7 | 17-19 | 0.3-0.8 | 7.5-8.5 | The rest | 2-2.5 |
Fe is the basis.
According to TU 14-1-204-72, the chemical composition is given for steel grades 25Х18Н8В2 (EI946) and 25Х18Н8В2-Ш (EI946-Ш). Deviations from the chemical composition are permissible: silicon ± 0.050%, chromium -0.50%, nickel + 0.50%, tungsten ± 0.10%, carbon + 0.010%. The presence of titanium up to 0.050%, aluminum up to 0.10%, copper to 0.25%, vanadium to 0.10%, molybdenum to 0.30%, niobium to 0.10%, cobalt to 0.50% sign.
According to TU 14-1-204-72, the chemical composition is given for steel grades 25Х18Н8В2 (EI946) and 25Х18Н8В2-Ш (EI946-Ш). Deviations from the chemical composition are permissible: silicon ± 0.050%, chromium -0.50%, nickel + 0.50%, tungsten ± 0.10%, carbon + 0.010%. The presence of titanium up to 0.050%, aluminum up to 0.10%, copper to 0.25%, vanadium to 0.10%, molybdenum to 0.30%, niobium to 0.10%, cobalt to 0.50% sign.
Mechanical characteristics
| Section, mm | sT|s0,2, MPa | σB, MPa | d5, % | y, % | kJ/m2, кДж/м2 | Brinell hardness number, MPa |
|---|---|---|---|---|---|---|
| Bars on the other 14-1-204-72. The longitudinal samples. The untreated or after annealing 800-840 °C (exposure 2 hours), air cooling | ||||||
| ≥313 | ≥735 | ≥20 | ≥35 | ≥690 | ≤302 | |
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 |
