Steel 78ХСФ
A4 steel
Steel 76F
76KhSF steel
Steel 76C (M76C)
78KhSF steel
Steel 90AF (E90AF)
Steel A1 (A0)
A2 steel
A3 steel
Steel 76VT (M76VT)
Steel wheel 1
Steel wheel 2
Steel wheel 3
Steel M75
Steel H50
OS Steel
PT70 steel
T60 steel
Steel 70 (M70)
Steel 2
Steel 3
3Gps steel
Steel 4
Steel 54 (M54)
5Gps steel
Steel 63 (K63)
Steel 68 (M68)
76T steel
Steel 73B (M73B)
Steel 73T (M73T)
Steel 73C (M73C)
Steel 74 (M74)
Steel 74T (M74T)
Steel 74C (M74C)
Steel 76 (M76)
Steel 76B (M76B)
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 78ХСФ |
| Designation GOST Latin | 78XCF |
| Transliteration | 78HSF |
| The chemical elements | 78CrСV |
Description
78ХСФ steel is used: for the manufacture of railroad rail types R50, R65, R65K and R75 designed for ribbon and continuous Railways and for the production of turnouts.
Note
K78KHSF Converter rail steel.
EH78KHSF — rail electric furnace steel.
Standards
| Name | Code | Standards |
|---|---|---|
| Rails. Lining. Lining. Crutches | В42 | GOST Р 51685-2000 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Fe | Al | V |
|---|---|---|---|---|---|---|---|---|---|
| GOST Р 51685-2000 | 0.74-0.82 | ≤0.025 | ≤0.025 | 0.75-1.05 | 0.4-0.6 | 0.4-0.8 | The rest | ≤0.005 | 0.05-0.15 |
Fe is the basis.
According to GOST R 51685-2000, the mass fraction of residual elements - nickel and copper - not more than 0.15% of each is allowed, with a total mass fraction of these elements not exceeding 0.40%. For a rail type P65K, the mass fraction of carbon should be 0.83-0.87%. At the same time, the numbers in the steel brand were replaced by 85.
According to GOST R 51685-2000, the mass fraction of residual elements - nickel and copper - not more than 0.15% of each is allowed, with a total mass fraction of these elements not exceeding 0.40%. For a rail type P65K, the mass fraction of carbon should be 0.83-0.87%. At the same time, the numbers in the steel brand were replaced by 85.
Mechanical characteristics
| sT|s0,2, MPa | σB, MPa | d5, % | y, % | kJ/m2, кДж/м2 | Brinell hardness number, MPa |
|---|---|---|---|---|---|
| Rails under GOST R 51685-2000 (in the delivery condition specified by the category of quality, the hardness is indicated on the surface of rail head) | |||||
| ≥850 | ≥1290 | ≥12 | ≥35 | ≥147 | 363-401 |
| - | ≥920 | ≥5 | - | - | - |
| ≥800 | ≥1180 | ≥8 | ≥25 | ≥245 | 341-401 |
| ≥750 | ≥1100 | ≥6 | ≥25 | ≥147 | 321-401 |
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 |
