Steel К76 products

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Steel grade K76 characteristics

Steel grade K76 – steel for the production of railway rails that meets the requirements of DSTU 4344 and GOST R 51685.

Classification: Rail steel.

Products: Wide-gauge railway rails of the P75, P65, P50, P65K type, rails for other purposes.

 

Chemical composition of steel grade K76 (ladle analysis) according to the requirements of DSTU 4344, %

С Si Mn Al S P
0.71 - 0.82            0.25 - 0.45     0.80 - 1.30 ≤ 0.025  ≤0.040                ≤ 0.035

 

Mechanical properties of rails from steel grade K76 according to the requirements of DSTU 4344

 Rail category   Tensile strength, N/mm2 (min) Yield strength, N/mm2 (min) Elongation, % (min) Reduction of area, % (min) Impact strength KCU, J/cm2 (min)
Highest 1290 850 10.0 30.0 15
I 1196 800 8.0 25.0 25
II 1137 740 6.0 25.0 15
III 900 - 5.0 - -

   

Application

Steel grade K76 is used in the production of railway rails of the P75, P65, P50 type and other steel rail products.

 

Welding

Due to its high carbon content, steel K76 belongs to the class of hard-to-weld steels. Therefore, only some types of welding can be used to bond rails – aluminothermal welding, oxyacetylene pressure welding, electrocontact welding, and electric arc welding.

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