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Spain UNE F.3221 Valve steel for internal combustion engines and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: F.3221 / F.3221
Category Grade Standard Region/Area Standard Content
Metals F.3221 UNE 36022 Spain Valve steel for internal combustion engines

Chemical composition(mass fraction)(wt.%) of the F.3221

Element Min Max Similar
Si 2.0000 3.0000 -
S - 0.0300 -
P - 0.0400 -
Mo 0.8000 1.3000 -
Mn - 0.8000 -
Cr 9.0000 11.0000 -
C 0.3500 0.4500 -

Mechanical Properties of steel grade F.3221

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)
321 (≥) 375 (≥) 22 14 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 313

Physical Properties of steel grade F.3221

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
41 - -     0.24 -  
944 192 - 21.3 243   -  
798 - 12 32.2   223 321

Heat Treatment of steel grade F.3221

Heat treated : 1458°C - 1238°C

Technological Curves of steel grade F.3221

Cross Reference Table (Equivalent Grade) of F.3221

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