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America SAE EX9 Former SAE Standard and Former SAE Ex-Steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: EX9 / EX 9
Category Grade Standard Region/Area Standard Content
Metals EX 9 SAE J 1249 America Former SAE Standard and Former SAE Ex-Steels

Chemical composition(mass fraction)(wt.%) of the EX 9

Element Min Max Similar
Si - 0.0500 -
S - 0.0400 -
P - 0.0350 -
Ni 0.2000 0.4000 -
Mo 0.0500 0.1000 -
Mn 0.9500 1.2500 -
Cr 0.2500 0.4000 -
C 0.1900 0.2400 -

Mechanical Properties of steel grade EX 9

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)
114 (≥) 663 (≥) 14 34 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 211

Physical Properties of steel grade EX 9

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
44 - -     0.34 -  
139 236 - 12.3 443   -  
449 - 34 22.2   423 232

Heat Treatment of steel grade EX 9

Heat treated : 1139°C - 1683°C

Technological Curves of steel grade EX 9

Cross Reference Table (Equivalent Grade) of EX 9

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