|Designation GOST Cyrillic||76Ф|
|Designation GOST Latin||76F|
|By chemical elements||76V|
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.
M76 °F — hearth rail steel with vanadium.
K76 °F — Converter rail steel with vanadium.
EH76 °F — rail electric furnace steel with vanadium.
|Rails. Lining. Lining. Crutches||В42||GOST Р 51045-97, GOST Р 51685-2000|
|GOST Р 51045-97||0.71-0.87||≤0.045||≤0.035||0.75-1.25||0.18-0.55||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||Rest||≤0.02||0.03-0.15|
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.
|Section, mm||sT|s0,2, MPa||σU, MPa||d5, %||y, %||KCU, kJ/m2||HB, 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)|
|Types of rails RP50, RP65 and РП75 according to GOST R 51045-97 on delivery|
Description mechanical marks
|sT|s0,2||Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%|
|σU||Limit short-term strength|
|d5||Elongation after rupture|
|y||The relative narrowing|
|HB||Brinell hardness number|