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America SAE EV12 Engine poppet valve information report and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: EV12 / EV 12
Category Grade Standard Region/Area Standard Content
Metals EV 12 SAE J 775 America Engine poppet valve information report

Chemical composition(mass fraction)(wt.%) of the EV 12

Element Min Max Similar
Si - 0.2500 -
S - 0.0300 -
P - 0.0500 -
Ni 1.5000 2.7500 -
N 0.2000 0.4000 -
Mn 7.0000 10.0000 -
Cr 19.2500 21.5000 -
C 0.5000 0.6000 -

Mechanical Properties of steel grade EV 12

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)
847 (≥) 318 (≥) 22 32 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 342

Physical Properties of steel grade EV 12

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
13 - -     0.43 -  
242 432 - 44.3 414   -  
425 - 21 34.2   112 231

Heat Treatment of steel grade EV 12

Heat treated : 1928°C - 1636°C

Technological Curves of steel grade EV 12

Cross Reference Table (Equivalent Grade) of EV 12

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