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Poland PN 55S2 Steel for springs -- Grades and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 55S2 / 55 S 2
Category Grade Standard Region/Area Standard Content
Metals 55 S 2 PN H84032 Poland Steel for springs -- Grades

Chemical composition(mass fraction)(wt.%) of the 55 S 2

Element Min Max Similar
C 0.5200 0.6000 -
Mn 0.6000 0.9000 -
P - 0.0400 -
S - 0.0400 -
Si 1.5000 1.8000 -
Ni - 0.4000 -
Cr - 0.3000 -
Cu - 0.2500 -
As - 0.0800 -

Mechanical Properties of steel grade 55 S 2

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)
364 (≥) 416 (≥) 24 11 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 324

Physical Properties of steel grade 55 S 2

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
44 - -     0.22 -  
198 164 - 33.3 431   -  
211 - 11 12.2   211 233

Heat Treatment of steel grade 55 S 2

Heat treated : 1296°C - 1173°C

Technological Curves of steel grade 55 S 2

Cross Reference Table (Equivalent Grade) of 55 S 2

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