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America SAE 550 Automotive Steel Castings and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 550 / 550
Category Grade Standard Region/Area Standard Content
Metals 550 SAE J 435 America Automotive Steel Castings

Chemical composition(mass fraction)(wt.%) of the 550

Element Min Max Similar
S - 0.0450 -
P - 0.0400 -

Mechanical Properties of steel grade 550

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)
168 (≥) 986 (≥) 31 34 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 424

Physical Properties of steel grade 550

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
11 - -     0.14 -  
487 131 - 22.3 432   -  
162 - 33 22.2   123 234

Heat Treatment of steel grade 550

Heat treated : 1962°C - 1968°C

Technological Curves of steel grade 550

Cross Reference Table (Equivalent Grade) of 550

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