Steel 76F
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 | 76Ф |
| Designation GOST Latin | 76F |
| Transliteration | 76F |
| The chemical elements | 76V |
Description
Steel 76 °F used: for the manufacture of rails types of RP50, RP65 and РП75 broad gauge for the tracks of industrial railway transport for railway tracks and turnouts of industrial enterprises; types of rails R50, R65, R65K and R75 designed for ribbon and continuous Railways and for the production of turnouts.
Note
M76 °F — hearth rail steel with vanadium.
K76 °F — Converter rail steel with vanadium.
EH76 °F — rail electric furnace steel with vanadium.
Standards
| Name | Code | Standards |
|---|---|---|
| Rails. Lining. Lining. Crutches | В42 | GOST Р 51045-97, GOST Р 51685-2000 |
Chemical composition
| Standard | C | S | P | Mn | Si | Fe | Al | V |
|---|---|---|---|---|---|---|---|---|
| GOST Р 51045-97 | 0.71-0.87 | ≤0.045 | ≤0.035 | 0.75-1.25 | 0.18-0.55 | The rest | - | 0.03-0.1 |
| GOST Р 51685-2000 | 0.71-0.82 | ≤0.04 | ≤0.035 | 0.75-1.05 | 0.25-0.45 | The rest | ≤0.02 | 0.03-0.15 |
Fe is the basis.
According to GOST R 51685-2000, the mass fraction of residual elements - chromium, nickel and copper, is not more than 0.15% of each, with a total mass fraction of these elements not exceeding 0.40%. The mass fraction of sulfur and phosphorus is indicated for steel M76F. In the steel grade K76F phosphorus ≤ 0.030%, sulfur ≤ 0.035%. In steel grade E76F phosphorus ≤ 0.025%, sulfur ≤ 0.030%.
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 - chromium, nickel and copper, is not more than 0.15% of each, with a total mass fraction of these elements not exceeding 0.40%. The mass fraction of sulfur and phosphorus is indicated for steel M76F. In the steel grade K76F phosphorus ≤ 0.030%, sulfur ≤ 0.035%. In steel grade E76F phosphorus ≤ 0.025%, sulfur ≤ 0.030%.
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
| Section, mm | 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 |
| - | - | ≥900 | ≥5 | - | - | - |
| - | ≥800 | ≥1180 | ≥8 | ≥25 | ≥245 | 341-401 |
| - | ≥750 | ≥1100 | ≥6 | ≥25 | ≥147 | 321-401 |
| Types of rails RP50, RP65 and РП75 according to GOST R 51045-97 on delivery | ||||||
| - | ≥780 | ≥3 | - | - | - | |
| - | ≥1080 | ≥5 | - | ≥147 | 311-420 | |
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 |
