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America SAE HEV8 Engine poppet valve information report and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: HEV8 / HEV 8
Category Grade Standard Region/Area Standard Content
Metals HEV 8 SAE J 775 America Engine poppet valve information report

Chemical composition(mass fraction)(wt.%) of the HEV 8

Element Min Max Similar
Ti 2.1000 2.4000 -
Si - 0.2000 -
S - 0.0150 -
P - 0.0150 -
Ni 55.0000 58.0000 -
Nb 0.7000 1.0000 -
Mo 1.7000 2.3000 -
Mn - 0.2000 -
Fe - - -
Cu - 0.5000 -
Cr 22.3000 22.9000 -
Co - 1.0000 -
C - 0.2000 -
B - 0.0080 -
Al 1.1000 1.4000 -

Mechanical Properties of steel grade HEV 8

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)
173 (≥) 422 (≥) 32 22 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 224

Physical Properties of steel grade HEV 8

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
12 - -     0.11 -  
283 848 - 32.3 224   -  
246 - 33 14.2   321 132

Heat Treatment of steel grade HEV 8

Heat treated : 1117°C - 1351°C

Technological Curves of steel grade HEV 8

Cross Reference Table (Equivalent Grade) of HEV 8

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