Characteristics of steel grade 65

Steel grade 65 is a structural carbon spring steel produced to the requirements of DSTU 8429 and GOST 14959.

Classification: Structural carbon steel.

Products: Flat steel and rolled sections including shapes, ingots, forgings, stamped parts.


Chemical composition of steel grade 65 based on heat analysis, %

С Si Mn S P Cr
0,62 - 0,70      0,17 - 0,37 0,50 - 0,80 ≤0,025 ≤0,025 ≤0,25


Approximate conditions for thermal treatment and mechanical properties of steel grade 65 (GOST 14959)

Quenching temperature, ºС Quenching media Tempering temperature, ºС Yield strength, N/mm2 (min) Tensile strength, N/mm2 (min) Elongation, % (min) ОReduction of area, % (min)
830 Oil 470 785 980 10 35


Equivalents of steel grade 65

USA 1064, 1065, G10640, G10650, G10690
Japan S58C, SUP2
European Union С67, C66D
China 65



Steel grade 65 is used for the manufacture of different parts, which, after quenching and tempering, obtain higher strength, elasticity and wear resistance at friction and vibration, e.g. shocks and springs.



Not used for welded structures.

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