Steel 76 (M76)
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 | 76 |
| Designation GOST Latin | 76 |
| Transliteration | 76 |
| The chemical elements | 76 |
| Name | The value |
|---|---|
| Designation GOST Cyrillic | М76 |
| Designation GOST Latin | M76 |
| Transliteration | M76 |
| The chemical elements | Mo76 |
Description
76 steel is 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; for the production of grooved tram rails of types Тв60 Тв65 and high quality.
Note
M76 — the steel open-hearth rail.
K76 — steel rail of the Converter.
Eh76 — electric furnace steel rail.
Standards
| Name | Code | Standards |
|---|---|---|
| Rails. Lining. Lining. Crutches | В42 | GOST 8161-75, GOST 16210-77, GOST 18267-82, GOST 24182-80, GOST Р 51045-97, GOST Р 51685-2000, TU 14-2-751-87 |
Chemical composition
| Standard | C | S | P | Mn | Si | Fe | Al |
|---|---|---|---|---|---|---|---|
| GOST 24182-80 | 0.71-0.82 | ≤0.045 | ≤0.035 | 0.75-1.05 | 0.18-0.4 | The rest | - |
| GOST Р 51685-2000 | 0.71-0.82 | ≤0.04 | ≤0.035 | 0.75-1.05 | 0.25-0.45 | The rest | ≤0.025 |
| GOST Р 51045-97 | 0.71-0.84 | ≤0.045 | ≤0.035 | 0.75-1.25 | 0.18-0.55 | The rest | - |
Fe is the basis.
According to GOST 24182-80 in the rails made of Kerch ores, the phosphorus content is not more than 0.040%, sulfur is not more than 0.050%, arsenic is not more than 0.15%. The rails of Group II must be made of calm open-hearth steel, deoxidized with aluminum or manganese-aluminum alloy.
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 M76. In the steel grade K76 phosphorus ≤ 0.030%, sulfur ≤ 0.035%. In steel grade E76 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 TU 14-2-751-87 the chemical composition for steel M76 is given. In the mark designation the letter "M" indicates the method of steel smelting (open-hearth), and the figures - the average carbon content in hundredths of a percent.
According to GOST 24182-80 in the rails made of Kerch ores, the phosphorus content is not more than 0.040%, sulfur is not more than 0.050%, arsenic is not more than 0.15%. The rails of Group II must be made of calm open-hearth steel, deoxidized with aluminum or manganese-aluminum alloy.
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 M76. In the steel grade K76 phosphorus ≤ 0.030%, sulfur ≤ 0.035%. In steel grade E76 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 TU 14-2-751-87 the chemical composition for steel M76 is given. In the mark designation the letter "M" indicates the method of steel smelting (open-hearth), and the figures - the average carbon content in hundredths of a percent.
Mechanical characteristics
| Section, mm | sT|s0,2, MPa | σB, MPa | d5, % | y, % | kJ/m2, кДж/м2 | Brinell hardness number, MPa |
|---|---|---|---|---|---|---|
| Mechanical properties of steel for rails type R65 and R75 GOST 24182-80 on delivery | ||||||
| - | ≥900 | ≥4 | - | - | - | |
| 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 |
| Rails type R65 and R75 GOST 18267-82. Bulk quenching in oil + Furnace vacation | ||||||
| ≥794 | ≥1176 | ≥6 | ≥25 | ≥245 | 341-388 | |
| Types of rails RP50, RP65 and РП75 according to GOST R 51045-97 on delivery | ||||||
| - | ≥780 | ≥3 | - | - | - | |
| - | ≥1080 | ≥5 | - | ≥147 | 311-420 | |
| Tram rails grooved high-quality on the other 14-2-751-87 | ||||||
| - | ≥820 | - | - | - | - | |
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 |
Technological properties
| Name | The value |
|---|---|
| Macrostructure and contamination | The macrostructure of the rails is guaranteed by the manufacturer. Not permitted residue shrinkage and delamination. |
