75 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 75

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GOST 75

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This page is mainly introduced the 75 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 75,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Spring carbon and alloy steel bars. Specifications
  • Steel Garde:75
  • Type:Structural Steel
  • Country:Russia
  • Standard:GOST
  • Standard Number:
    ITEM Standard Number Descriptions
    1 GOST 14959 Spring carbon and alloy steel bars. Specifications
  • Application: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

Tensile strength 711~552 σb/MPa
Yield Strength 128 σ 0.2 ≥/MPa
Elongation 02 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 345~628 -
HRC 30 -

Physical Properties

Thermal expansion 48-88 e-6/K
Thermal conductivity 77-80 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 9861-0529 째C
Density 1667-9326 kg/m3
Resistivity 0.50-0.60 Ohm.mm2/m
     

Heat Treatment Regime

Annealing

Quenching

Tempering

Normalizing

Q & T

Size Availability

Steel Grade Specification Processing range(mm)
75 Structural Steel Round Bar and Hollow Bar Φ1 to Φ2000
Square and Flat Steel Φ10 to Φ100
Plate and Sheet 0.08-800(Thickness)*10-1500(Width)*Length
Tube or Pipe OD:Φ4-410; WT:1-35 mm; Lenght:10-12000
Coil and Strip Steel THK:0.1mm Width:1500mm
Forged Ring/Cylindrical/Disk

Technical specification/standard for download

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