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GOST 75 Details

Spring carbon and alloy steel bars. Specifications

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75 Application:Spring carbon and alloy steel bars. Specifications
Category Type Grade Designations
Grades Structural Steel 75 Russia - GOST , GOST 14959 - Spring carbon and alloy steel bars. Specifications
Chemical composition(mass fraction)(wt.%)
Elements Min.(≥) Max.(≤)
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
Mechanical properties of grade 75
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)
542 (≥) 586 (≥) 11 43 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 214
Physical properties of grade 75
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
544 (≥) 619 (≥) 14 31 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 434
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
337 432 341
75 Range of products
Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED
Cross Reference Table(Equivalent Grade)
Grade Standard Country Application
75 GOST Russia
Spring carbon and alloy steel bars. Specifications

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