|Designation GOST Cyrillic||ОС|
|Designation GOST Latin||OC|
|By chemical elements||ОС|
OS steel is used: for the manufacture of rolled billets of square or circular cross-section designed for the production of axes of wheel pairs of locomotives, electric trains, disulphoton, cars Railways and subway trains, special railway rolling stock of 1520 mm.
Blanks of axles of rolling stock are manufactured from steel obtained by the open-hearth, basic oxygen or electric arc method.
The steel must be subjected to secondary treatment by blowing an inert gas. By agreement with consumer it is allowed manufacture of the blanks from steel without secondary treatment with an inert gas.
|Bandages. Wheels. Axis||В41||GOST 6143-78, GOST 30272-96, GOST 31334-2007, GOST 4008-89, GOST 4728-2010|
According to GOST 4728-2010 the casting composition for the ladle sample of steel grade OS is given. The mass fraction of aluminum should not be more than 0.035%. As agreed by the manufacturer with the consumer, it is allowed to set the lower value of the aluminum content. The total content of sulfur and phosphorus in steel cast in ingots is no more than 0.065%, and for continuous casting - no more than 0.045%. The maximum deviations in the mass fraction of chemical elements in the finished axial billets are: for carbon + 0.030 / -0.020%, manganese + 0.100 / -0.050%, silicon ± 0.050%, sulfur and phosphorus ± 0.0050% for each.
|sT|s0,2, MPa||σU, MPa||d5, %||KCU, kJ/m2|
|Billet axis for tram cars according to GOST 6143-78. Normalizing or hardening + Vacation|
|Billet oseeva (190-350 mm) of rolling stock in the state of delivery according to GOST 4728-2010|
|Draft-axis according to GOST 31334-2007. Normalizing or Normalizing + Tempering (samples of wheel seat of axle)|
|Draft-axis according to GOST 31334-2007. Normalizing or Normalizing + Tempering (samples from the axle or extra thickness)|
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|
|Weldability||Does not apply to welded structures.|
|The tendency to temper brittleness||tend not|
|Flock-sensitive sensitivity||not sensitive|