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America SAE NV4 Engine poppet valve information report and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: NV4 / NV 4
Category Grade Standard Region/Area Standard Content
Metals NV 4 SAE J 775 America Engine poppet valve information report

Chemical composition(mass fraction)(wt.%) of the NV 4

Element Min Max Similar
Si 0.1500 0.3000 -
S - 0.0400 -
P - 0.0400 -
Ni 1.1000 1.4000 -
Mn 0.7000 0.9000 -
Cr 0.5500 0.6500 -
C 0.3800 0.4300 -

Mechanical Properties of steel grade NV 4

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)
589 (≥) 511 (≥) 41 31 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 413

Physical Properties of steel grade NV 4

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
33 - -     0.42 -  
979 438 - 11.3 221   -  
771 - 22 23.2   224 242

Heat Treatment of steel grade NV 4

Heat treated : 1857°C - 1128°C

Technological Curves of steel grade NV 4

Cross Reference Table (Equivalent Grade) of NV 4

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