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Poland PN 25 Unalloyed wrought steel for case hardening and for quenching and tempering -- Grades and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 25 / 25
Category Grade Standard Region/Area Standard Content
Metals 25 PN H84019 Poland Unalloyed wrought steel for case hardening and for quenching and tempering -- Grades

Chemical composition(mass fraction)(wt.%) of the 25

Element Min Max Similar
C 0.2200 0.2900 -
Mn 0.4000 0.7000 -
P - 0.0400 -
S - 0.0400 -
Si 0.1000 0.4000 -
Ni - 0.3000 -
Cr - 0.3000 -
Mo - 0.1000 -
Cu - 0.3000 -
As - 0.0800 -

Mechanical Properties of steel grade 25

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)
151 (≥) 881 (≥) 13 34 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 424

Physical Properties of steel grade 25

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
42 - -     0.24 -  
464 532 - 12.3 311   -  
769 - 41 32.2   132 113

Heat Treatment of steel grade 25

Heat treated : 1537°C - 1421°C

Technological Curves of steel grade 25

Cross Reference Table (Equivalent Grade) of 25

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