75 Structural Steel to GOST 14959

75 - Specification & Application

  • GOST 14959 - Spring carbon and alloy steel bars. Specifications

Spring carbon and alloy steel bars. Specifications

Chemical composition(wt.%) of 75 grade: to GOST 14959

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.72 0.80
Si 0.17 0.37
Mn 0.50 0.80
P - 0.035
S - 0.035
Cr - 0.25
Ni - 0.25
Cu - 0.20

75 - Detail

Spring carbon and alloy steel bars. Specifications

Mechanical properties of grade 75 GOST 14959

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
859 (≥) 884 (≥) 12 23 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 131

Physical properties of grade 75 GOST 14959

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
568 (≥) 551 (≥) 42 13 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 312
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
763 544 264

Equivalent Grade

Equivalent Products

We can customize the production of 75 grade, contact us for the best solution.
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