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Poland PN 75 Steel for springs -- Grades and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 75 / 75
Category Grade Standard Region/Area Standard Content
Metals 75 PN H84032 Poland Steel for springs -- Grades

Chemical composition(mass fraction)(wt.%) of the 75

Element Min Max Similar
As - 0.0800 -
Si 0.1700 0.3700 -
S - 0.0400 -
P - 0.0400 -
Ni - 0.3000 -
Mn 0.5000 0.8000 -
Cu - 0.2500 -
Cr - 0.3000 -
C 0.7200 0.8000 -

Mechanical Properties of steel grade 75

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
424 (≥) 328 (≥) 22 33 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 224

Physical Properties of steel grade 75

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
32 - -     0.42 -  
595 413 - 12.3 121   -  
662 - 12 32.2   213 424

Heat Treatment of steel grade 75

Heat treated : 1196°C - 1544°C

Technological Curves of steel grade 75

Cross Reference Table (Equivalent Grade) of 75

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