Steel 25ХН3МФА (25ХН3МФАР)
Steel 35KhSN3M1A (VKS-8)
Steel 30Kh2GSN2VM (30Kh2GSN2M1; VL-1)
Steel 30Kh2GSNVM (VL-1D)
Steel 30Х2Н2СВМФА (VKS-3)
Steel 30KhGSN2A (30KhGSNA)
Steel 30KhGSN2MA (30KhGSNMA)
Steel 30ХН3М1ФА (30ХН3М1Ф)
Steel 30ХН3М2ФА (30ХН3М2Ф)
Steel 32KhN8M1FK5A (VKS-6)
Steel 34KhMA (34KhM)
Steel 34KhN3MA (0KhN3M)
Steel 35KhMA (35KhMAR)
Steel 35KhN1M2FA
Steel 35KHN3MFA (35KHN3MFAR)
Steel 35ХС2Н3М1ФА (VKS-9)
Steel 28ХНН3МФА (28ХН3МФ)
Steel 36KHN3MFA (36KHN3MF)
Steel 38Kh3SNMVFA (SP38)
38KhMFYUA steel
38KhN3MFA steel (38KhN3MF)
40GMFR steel
Steel 40KhN2SVA (EI643)
Steel 40KhN2SMA (EI643M)
Steel 42Kh2GSNM (VKS-1)
43Kh3SNMVFA steel (SP43)
Steel 45Г15Н9Х2ЮФ (EP769)
45Kh3NM2FA steel
Steel АЦ28ХГН2АФБ
Steel АЦ28ХГН3ФТ
B2G steel
X11MNAFB steel
20KhGSNM steel
Steel 01N17K12M5T (EP845; VKS-240)
Steel 02N18K9M5T (EP637A; VKS-210)
Steel 03N18K8M5T (VKS-170; EK21)
Steel 03N19K6M5TR (EP631)
Steel 03Cr14H7V
Steel 08Х15Н25Т2МФР (EP674)
Steel 09Х16НМ2Д (EP887; VNS28)
Steel 120G13 (EI256)
12Kh3GNMFBA steel
Steel 15Х16Н3КАМФ2 (VNS-47; EK81)
15Kh2GMF steel
15Kh2NMFA steel
Steel 16X16H3MAD (EP811; VSN21)
Alloy 20ХГСН2МФА (DI107)
Steel 28Kh3SNMVFA (SP28; EP326A)
Steel 25Х12Н2В2М2Ф (EP311; VNS-6)
Steel 25Х20Н9В2М (EP466)
Steel 25Kh2GNTA
Steel 25Х2ГНТРА
Steel 25Х2Н4МФА
Steel 25Kh2NMF (25Kh2NMFA)
Steel 25KhGSNMA
Steel 25KhN3MFA (25KhN3MFAR)
Steel 25ХСНВФА (VP25)
Steel 26ХН3М2ФА (26ХН3М2ФАA)
Steel 26KhN3MF (26KhN3MFA)
Steel 26KhN4MF (26KhN4MFA)
Steel 27ХН3М2ФА (27ХН3М2Ф)
Steel 27ХН3МФА (27ХН3МФ)
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 25ХН3МФА |
| Designation GOST Latin | 25XH3MFA |
| Transliteration | 25HN3MFA |
| The chemical elements | 25CrН3MoV |
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 25ХН3МФАР |
| Designation GOST Latin | 25XH3MFAP |
| Transliteration | 25HN3MFAR |
| The chemical elements | 25CrН3MoVNB |
Description
25ХН3МФА steel is used: for the manufacture of forgings of various parts of General engineering; billets of shafts of gas turbine rotors and turbine generators; backup rolls of rolling mills.
Standards
| Name | Code | Standards |
|---|---|---|
| Bulls. Blanks. Slabs | В31 | TU 108.11.943-87, TU 108.11.945-87 |
| Metal forming. Forgings | В03 | TU 3-896-78, TU 108.11.931-87, TU 108-11-38-76, TU 108.11.917-87 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | V | Mo |
|---|---|---|---|---|---|---|---|---|---|---|---|
| TU 3-896-78 | 0.22-0.3 | ≤0.025 | ≤0.025 | 0.25-0.5 | 1.4-1.8 | 0.17-0.37 | 3-3.75 | The rest | ≤0.2 | 0.08-0.15 | 0.3-0.5 |
| TU 108.11.917-87 | 0.2-0.25 | ≤0.02 | ≤0.02 | 0.25-0.5 | 1.4-1.8 | ≤0.37 | 3-3.75 | The rest | ≤0.3 | 0.08-0.15 | 0.3-0.5 |
Fe is the basis.
According to TU 3-896-78 the chemical composition is given for the rotary grade steel 25ХН3МФАР.
According to TU 108.11.917-87 the chemical composition is given for steel grade 25ХН3МФА. The total content of phosphorus and sulfur should be ≤ 0.035%. According to TU 108.11.917-87, after processing the steel on the OSRV, a limitation on the sulfur content ≤ 0.015% and phosphorus ≤ 0.015% is introduced. The total content of sulfur and phosphorus after OSRV ≤ 0.020%.
According to TU 3-896-78 the chemical composition is given for the rotary grade steel 25ХН3МФАР.
According to TU 108.11.917-87 the chemical composition is given for steel grade 25ХН3МФА. The total content of phosphorus and sulfur should be ≤ 0.035%. According to TU 108.11.917-87, after processing the steel on the OSRV, a limitation on the sulfur content ≤ 0.015% and phosphorus ≤ 0.015% is introduced. The total content of sulfur and phosphorus after OSRV ≤ 0.020%.
Mechanical characteristics
| sT|s0,2, MPa | σB, MPa | d5, % | y, % | kJ/m2, кДж/м2 |
|---|---|---|---|---|
| Forged billet rotors of turbine generators, thermal power plants up to 500 MW III-VI categories on the other 3-896-78 (indicate the cutting direction of sample) | ||||
| ≥540 | ≥687 | ≥19 | ≥55 | ≥1177 |
| ≥540 | ≥687 | ≥17 | ≥45 | ≥785 |
| ≥638 | ≥785 | ≥18 | ≥55 | ≥981 |
| ≥638 | ≥785 | ≥17 | ≥45 | ≥687 |
Description mechanical marks
| Name | Description |
|---|---|
| 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 |
