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America SAE 4718 Estimated mechanical properties and machinability of steel bars and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 4718 / 4718
Category Grade Standard Region/Area Standard Content
Metals 4718 SAE J 1397 America Estimated mechanical properties and machinability of steel bars

Chemical composition(mass fraction)(wt.%) of the 4718

Element Min Max Similar
Si 0.1500 0.3500 -
S - 0.0400 -
P - 0.0350 -
Ni 0.9000 1.2000 -
Mo 0.1500 0.2500 -
Mn 0.5000 0.7000 -
Cu - 0.3500 -
Cr 0.3500 0.5500 -
C 0.1700 0.2200 -

Mechanical Properties of steel grade 4718

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)
255 (≥) 595 (≥) 11 41 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 143

Physical Properties of steel grade 4718

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
43 - -     0.43 -  
945 395 - 11.3 121   -  
715 - 41 32.2   214 321

Heat Treatment of steel grade 4718

Heat treated : 1264°C - 1897°C

Technological Curves of steel grade 4718

Cross Reference Table (Equivalent Grade) of 4718

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