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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PN 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.
Steel for springs — Peeled bars, cold drawn bars and wires
  • Steel Garde:75
  • Type:Structural Steel
  • Country:Poland
  • Standard:PN
  • Standard Number:
    ITEM Standard Number Descriptions
    1 PN-H-84032 (1974) Steel for springs - Grades
    2 PN-H-93005 (1996) Steel for springs — Peeled bars, cold drawn bars and wires
  • Application:Steel for springs — Peeled bars, cold drawn bars and wires

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤)
C 0.72  0.80
Si 0.17  0.37
Mn 0.50  0.80
P   0.040
S   0.040
Cr   0.35
Ni   0.30
Cu   0.25

Mechanical Properties

Tensile strength 309~093 σb/MPa
Yield Strength 103 σ 0.2 ≥/MPa
Elongation 37 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 779~287 -
HRC 30 -

Physical Properties

Thermal expansion 42-52 e-6/K
Thermal conductivity 37-24 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 9225-4095 째C
Density 5053-9303 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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