Steel 40ХН2СМА (EI643M)
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 | 40ХН2СМА |
| Designation GOST Latin | 40XH2CMA |
| Transliteration | 40HN2SMA |
| The chemical elements | 40CrН2СMo |
| Name | The value |
|---|---|
| Designation GOST Cyrillic | ЭИ643М |
| Designation GOST Latin | EI643M |
| Transliteration | EhI643M |
| The chemical elements | - |
Description
40ХН2СМА steel is used: for the manufacture of seamless tubes and components for chemical engineering and special equipment.
Note
High-strength steel. The replacement of molybdenum vanadium steel marked 40ХН2СВА (ЭИ643).
Standards
| Name | Code | Standards |
|---|---|---|
| Classification, nomenclature and general norms | В20 | OST 1 90005-91 |
| Norms of calculation and design | В02 | PI 1.2.053-78 |
| Bulls. Blanks. Slabs | В31 | TU 1-92-156-90 |
| Sectional and shaped rolling | В32 | TU 14-1-1885-85, TU 14-1-313-72 |
| Pipes steel and connecting parts to them | В62 | TU 14-3-170-73, TU 14-3-674-78, TU 14-3-463-2005 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | Mo | W |
|---|---|---|---|---|---|---|---|---|---|---|---|
| TU 14-1-1885-85 | 0.36-0.42 | ≤0.011 | ≤0.015 | 0.5-0.8 | 0.8-1.1 | 0.7-1 | 2.5-3 | The rest | ≤0.25 | 0.3-0.4 | - |
| TU 14-1-313-72 | 0.36-0.42 | ≤0.025 | ≤0.025 | 0.5-0.8 | 0.8-1.1 | 0.7-1 | 2.5-3 | The rest | - | 0.3-0.4 | ≤0.2 |
| TU 14-3-674-78 | 0.36-0.44 | ≤0.005 | ≤0.025 | 0.25-0.5 | 0.8-1.1 | 0.9-1.2 | 1.8-2.1 | The rest | - | 0.35-0.45 | - |
Fe is the basis.
According to TU 14-3-674-78 the chemical composition is given for steel 40ХН2СМА-ВД (ЭИ643М-ВД).
According to TU 14-1-313-72 the chemical composition is given for steel 40ХН2СМА (ЭИ643М). The mass fraction of residual copper in steel should not exceed 0.25%. In bars and forgings, subject to other requirements, deviations from the chemical composition standards for carbon are allowed - + 0.010%, for manganese - ± 0.050%, for chromium ± 0.10%, for nickel ± 0.10%, for tungsten - ± 0.10%, molybdenum - + 0.050%.
According to TU 14-1-1885-85 the chemical composition is given for steel 40ХН2СМА-ВД (ЭИ643М-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%, titanium to 0.030% is not a rejection sign. In the steel, partial replacement of molybdenum with tungsten is allowed. The total content of molybdenum and tungsten converted to molybdenum from the calculation: three parts by weight of tungsten replace one part by weight of molybdenum, should correspond to the content of molybdenum indicated in the table. In this case, the content of tungsten in steel should not exceed 0.30%. The permissible deviation in the content of manganese in steel is + 0.010 / -0.020%, in carbon content + 0.010%, in sulfur and phosphorus content, provided that their total content is not more than 0.022%.
According to TU 14-3-674-78 the chemical composition is given for steel 40ХН2СМА-ВД (ЭИ643М-ВД).
According to TU 14-1-313-72 the chemical composition is given for steel 40ХН2СМА (ЭИ643М). The mass fraction of residual copper in steel should not exceed 0.25%. In bars and forgings, subject to other requirements, deviations from the chemical composition standards for carbon are allowed - + 0.010%, for manganese - ± 0.050%, for chromium ± 0.10%, for nickel ± 0.10%, for tungsten - ± 0.10%, molybdenum - + 0.050%.
According to TU 14-1-1885-85 the chemical composition is given for steel 40ХН2СМА-ВД (ЭИ643М-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%, titanium to 0.030% is not a rejection sign. In the steel, partial replacement of molybdenum with tungsten is allowed. The total content of molybdenum and tungsten converted to molybdenum from the calculation: three parts by weight of tungsten replace one part by weight of molybdenum, should correspond to the content of molybdenum indicated in the table. In this case, the content of tungsten in steel should not exceed 0.30%. The permissible deviation in the content of manganese in steel is + 0.010 / -0.020%, in carbon content + 0.010%, in sulfur and phosphorus content, provided that their total content is not more than 0.022%.
Mechanical characteristics
| Section, mm | σB, MPa | d5, % | y, % | kJ/m2, кДж/м2 | Brinell hardness number, MPa | HRC |
|---|---|---|---|---|---|---|
| Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91 | ||||||
| - | 1770-1960 | - | - | - | - | 49.5-52.5 |
| Bars of steel 40ХН2СМА (EI643M) TU 14-1-1885-85. Quenching in oil with 890-910 °C + Vacation at 200-260 °C, air cooling. In the graph KCU KCU values are shown along the fiber/KCU across the grain | ||||||
| ≥1860 | ≥9 | ≥40 | ≥490/106 | ≤514 | - | |
| Long products and forgings on the other 1-92-156-90 (TU 14-1-313-72). Quenching in oil with 890-910 °C + Vacation at 200-260 (200-300) °C, air cooling | ||||||
| ≥1860 | ≥8 | ≥35 | ≥590 | ≤514 | - | |
Description mechanical marks
| Name | Description |
|---|---|
| Section | Section |
| σB | Limit short-term strength |
| d5 | Elongation after rupture |
| y | The relative narrowing |
| kJ/m2 | Toughness |
| HRC | Rockwell hardness (indenter diamond spheroconical) |
Technological properties
| Name | The value |
|---|---|
| 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. |
| Features of heat treatment | Bars and forgings on the other 14-1-313-72 put after the heat treatment (low annealing), hardness Brinell hardness no more than 269НВ (indentation diameter not less than 3.7 mm). Recommended low mode annealing: heating to a temperature of 650-680 °C, exposure time 12 hours, air cooling. Forgings to low annealing subjected to preliminary normalization with a temperature of 900 °C. |
