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PN 75 Details

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75 Application:Steel for springs — Peeled bars, cold drawn bars and wires

Category Type Grade Designations
Grades Structural Steel 75 Poland - PN , PN-H-84032 (1974) - Steel for springs - Grades
PN-H-93005 (1996) - Steel for springs — Peeled bars, cold drawn bars and wires

Chemical composition(wt.%) of 75 grade: PN-H-84032 (1974)

Elements Min.(≥) Max.(≤) Similar Remarks
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
Steel for springs — Peeled bars, cold drawn bars and wires

Mechanical properties of grade 75 PN-H-84032 (1974)

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)
232 (≥) 387 (≥) 32 11 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 243

Physical properties of grade 75 PN-H-84032 (1974)

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
534 (≥) 389 (≥) 44 34 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 431
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
711 262 817

75 - Form of Supply

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 PN Poland
Steel for springs — Peeled bars, cold drawn bars and wires

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